Brain Wave Oscillations as an Objective Neurophysiological Biomarker of Homeopathic Subjective Well-Being.

BACKGROUND: Homeopathy uses the "similitude principle" to arouse a therapeutic reaction in the body against its own disorders. For this to occur optimally, the medicinal pathogenetic effects must present similarity with the totality of the individual's symptoms. To assess if this similarity has been successfully achieved, Hahnemann states that "improvement in the disposition and mind"-i.e., subjective well-being-is the most important parameter to consider. AIM: Our aim was to perform a narrative review of the literature, exploring what is known about subjective well-being as a marker of therapeutic action, and to formulate ways in which subjective well-being might be quantifiable and applied in future homeopathy research. RESULTS: The concept of subjective well-being has been extensively studied in the complementary and conventional medical literature. Improved well-being has been observed in clinical trials, including those in the fields of positive psychology and meditation. Positive subjective outcomes of this nature are supported by objective evidence through associated changes in brain oscillatory activity using electroencephalography and/or "brain mapping" by functional magnetic resonance imaging. Neurophysiological responses in the brain have been identified in subjects after they ingested a homeopathic medicine. CONCLUSIONS: The concept of subjective well-being is supported by a body of literature and is a measurable entity. When viewed from the perspective of electrophysiological changes, brain activity is an objective neurophysiological biomarker with a potential to quantify individual well-being in the context of homeopathy research.

Telomere and Telomerase: Biological Markers of Organic Vital Force State and Homeopathic Treatment Effectiveness.

BACKGROUND: Philosophical-scientific correlations described in previous studies suggest that the genome can be the biological representation of the vital force, whilst the disease-promoting epigenetic alterations would be the biological representation of the chronic miasmas. In this study, we expand the functional correlation between vital force and chromosomes, describing the mechanism of action of the telomere-telomerase complex in the context of physiological balance. AIMS: The aim of the work is to study the role of the telomere-telomerase complex in cell vitality, biological aging, and the health-disease process, with the goal of proposing the use of telomere length as a biomarker of the vital force state and the effectiveness of homeopathic treatment. RESULTS: Similar to the vital force, telomere length and telomerase enzyme activity play an important role in maintaining cellular vitality, biological longevity, and physiological homeostasis. Telomere shortening functions as a biomarker of vital imbalance and is associated with numerous diseases and health disorders. On the other hand, health-promotion practices neutralize the pathological shortening of the telomeres, acting therapeutically in diseases or age-dependent health disorders. CONCLUSIONS: As a hypothetical biomarker of the vital force state, an intra-individual analysis of the mean leukocyte telomere length before, during, and after homeopathic treatment can be used as a biomarker of therapeutic effectiveness.

Correlation between Vitalism and Genetics According to the Paradigm of Complexity.

BACKGROUND: In homeopathic philosophy, vital force is a non-material substrate that is responsible for maintaining the body's sensations and functions and where homeopathic medicines act. In genetics, the body's vital functions are controlled by biochemical information, which is contained in the cell genome and consists of a protein encoding portion (exome) and another that regulates this encoding scheme (epigenome). Both the philosophical vital force and the genome present properties of complex and dynamic self-organisation systems. AIMS: This study aimed to explore and develop a philosophical-scientific correlation between vitalism and genetics according to the complexity paradigm. RESULTS: Vital principle and genome present inseparable composition among distinct existing components that influence one another and form a network of connections that create complex and dynamic self-organisation behaviour. Described in both models, 'vortex' indicates the existence of a force coming from within the system that is externalised as an emergent, information-transmitting phenomenon. Supporting this correlation, some experimental studies show that homeopathic medicines act on the genome by modulating gene expression. CONCLUSIONS: In line with the similarity of existing characteristics and properties, the genome may be considered as hypothetical biological substrate of organic vital force.

Isopathic Use of Auto-Sarcode of DNA as Anti-Miasmatic Homeopathic Medicine and Modulator of Gene Expression?

INTRODUCTION: In addition to the four pillars of homeopathy, vitalism and the miasmatic theory are often used to explain the health-disease process. According to Hahnemann's concepts, homeopathic miasms are the main obstacle to the cure of chronic diseases, with psora being the fundamental cause of all forms of diseases. According to modern genetics, the disease-promoting epigenetic alterations are the fundamental cause of the manifestation of chronic diseases. OBJECTIVE: This article develops a philosophical-scientific correlation between chronic miasms and disease-promoting epigenetic modifications, aiming to justify the isopathic use of auto-sarcode of an individual's DNA as homeopathic medicine. RESULTS: Based on the study of homeopathic doctrine and epigenetics, a conceptual and functional correlation is observed between homeopathic chronic miasms and disease-promoting epigenetic modifications. Additionally, several experimental studies suggest that homeopathy's mechanism of action may be by modulating gene expression. CONCLUSIONS: By the philosophical-scientific correlations described, it is inferred that disease-promoting epigenetic alterations are the biological representation of the chronic miasms, suggesting the isopathic use of auto-sarcode of DNA as homeopathic therapeutic modulator of gene expression for the management of chronic diseases.

Biological therapies (immunomodulatory drugs), worsening of psoriasis and rebound effect: new evidence of similitude.

BACKGROUND: Employing the secondary action or adaptative reaction of the organism as therapeutic response, homeopathy uses the treatment by similitude (similia similibus curentur) administering to sick individuals the medicines that caused similar symptoms in healthy individuals. Such homeostatic or paradoxical reaction of the organism is scientifically explained through the rebound effect of drugs, which cause worsening of symptoms after withdrawal of several palliative treatments. Despite promoting an improvement in psoriasis at the beginning of the treatment, modern biological therapies provoke worsening of the psoriasis (rebound psoriasis) after discontinuation of drugs. METHOD: Exploratory qualitative review of the literature on the occurrence of the rebound effect with the use of immunomodulatory drugs [T-cell modulating agents and tumor necrosis factor (TNF) inhibitors drugs] in the treatment of psoriasis. RESULTS: Several researches indicate the rebound effect as the mechanism of worsening of psoriasis with the use of efalizumab causing the suspension of its marketing authorization in 2009, in view of some severe cases. Other studies also have demonstrated the occurrence of rebound psoriasis with the use of alefacept, etanercept and infliximab. CONCLUSION: As well as studied in other classes of drugs, the rebound effect of biologic agents supports the principle of similitude (primary action of the drugs followed by secondary action and opposite of the organism).

Protocol of randomized controlled trial of potentized estrogen in homeopathic treatment of chronic pelvic pain associated with endometriosis.

BACKGROUND: Endometriosis is a chronic inflammatory disease that causes difficult-to-treat pelvic pain. Thus being, many patients seek help in complementary and alternative medicine, including homeopathy. The effectiveness of homeopathic treatment for endometriosis is controversial due to the lack of evidences in the literature. The aim of the present randomized controlled trial is to assess the efficacy of potentized estrogen compared to placebo in the treatment of chronic pelvic pain associated with endometriosis. METHODS/DESIGN: The present is a randomized, double-blind, placebo-controlled trial of a homeopathic medicine individualized according to program 'New Homeopathic Medicines: use of modern drugs according to the principle of similitude' (http://newhomeopathicmedicines.com). Women with endometriosis, chronic pelvic pain and a set of signs and symptoms similar to the adverse events caused by estrogen were recruited at the Endometriosis Unit of Division of Clinical Gynecology, Clinical Hospital, School of Medicine, University of São Paulo (Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - HCFMUSP). The participants were selected based on the analysis of their medical records and the application of self-report structured questionnaires. A total of 50 women meeting the eligibility criteria will be randomly allocated to receive potentized estrogen or placebo. The primary clinical outcome measure will be severity of chronic pelvic pain. Statistical analysis will be performed on the intention-to-treat and per-protocol approaches comparing the effect of the homeopathic medicine versus placebo after 24 weeks of intervention. DISCUSSION: The present study was approved by the research ethics committee of HCFMUSP and the results are expected in 2016. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: https://clinicaltrials.gov/ct2/show/NCT02427386.

Immunomodulatory drugs (natalizumab), worsening of multiple sclerosis, rebound effect and similitude.

BACKGROUND: Homeopathic treatment is based on the principle of similitude ('like cures like') administering to sick individuals substances that cause similar symptoms in healthy individuals, employing the paradoxical or biphasic action of the organism as therapeutic response. This homeostatic, vital or secondary action of the organism is scientifically explained by the rebound effect of drugs, resulting in worsening of symptoms after enantiopathic treatment withdrawal. Natalizumab reduces relapses in patients with active multiple sclerosis (MS), but recent studies report severe worsening of MS after suspension of treatment, as a consequence of the rebound effect. METHOD: Extending this source of evidence, this work reviews research that demonstrates secondary worsening of MS after discontinuation of natalizumab, a human monoclonal antibody that suppresses the disease inflammatory activity as primary action. RESULTS: Several studies refer to the immune reconstitution inflammatory syndrome (IRIS) as a plausible explanation of reactivation of MS after withdrawal of natalizumab: a rebound effect or secondary action of the organism in response to the primary immunosuppression caused by the drug. CONCLUSION: Relapses of MS after discontinuation of natalizumab treatment indicate rebound of disease activity, supporting the homeopathic principle and warning healthcare professionals about this serious iatrogenic event.

Antiresorptive drugs (bisphosphonates), atypical fractures and rebound effect: new evidence of similitude.

BACKGROUND: Homeopathy is based on treatment by similitude ('like cures like') administering to sick individuals substances that cause similar symptoms in healthy individuals, employing the secondary and paradoxical action of the organism as therapeutic response. This vital or homeostatic reaction of the organism can be scientifically explained by the rebound effect of drugs, resulting in worsening of symptoms after suspension of treatment. Bisphosphonates (BPs) reduce 'typical' fractures in patients with osteoporosis, but recent studies report 'atypical' fractures of the femur after stopping the BPs, a rebound effect may be the causal mechanism. METHOD: Review of the literature concerning the relationship between atypical femoral fractures and antiresorptive drugs (bisphosphonates), identifying the pathogenesis of this adverse event. RESULTS: Several studies have described multiple cases of 'atypical' low-impact subtrochanteric stress fractures or complete fractures of the femur. These fractures are often bilateral, preceded by pain in the affected thigh, may have a typical X-ray appearance, and may delayed healing. Rebound of osteoclastic activity after suspension of antiresorptive drugs is a plausible mechanism to explain this phenomenon. CONCLUSION: As for other classes of drugs, the rebound effect of antiresorptive drugs supports Hahnemann's similitude principle (primary action of the drugs followed by secondary and opposite action of the organism), and clarifies this 'unresolved' issue. Unfortunately, the rebound effect is little discussed among health professionals, depriving them of important knowledge ensure safe management of drugs.

Rebound acid hypersecretion after withdrawal of gastric acid suppressing drugs: new evidence of similitude.

BACKGROUND: Homeopathy is based on the principle of similitude (similia similibus curentur) using medicines that cause effects similar to the symptoms of disease in order to stimulate the reaction of the organism. Such vital, homeostatic or paradoxical reaction of the organism is closely related to rebound effect of drugs. METHOD: Review of the literature concerning the rebound effects of drugs used to suppress gastric acidity, particularly proton pump inhibitors (PPIs). RESULTS: The mechanism of action of these effects is discussed. Rebound in terms of clinical symptoms and physiological effects occur in about 40% of people taking PPIs, their timing depends on the half-life of the drug and the adaptation period of the physiological mechanisms involved. The wide use of PPIs may be linked to the rising incidence of carcinoid tumours. CONCLUSIONS: These findings support Hahnemann's concept of secondary action of drugs. We are developing a homeopathic materia medica and repertory of modern drugs on the basis of reported rebound effects.

New homeopathic medicines: use of modern drugs according to the principle of similitude.

BACKGROUND: The homeopathic method is based on the application of the principle of therapeutic similitude (similia similibus curentur), using medicines that cause effects similar to the symptoms of disease in order to stimulate the reaction of the organism against disturbances. Such vital, homeostatic or paradoxical reaction of the organism can be scientifically explained on the basis of the rebound effect of modern drugs. AIMS: This article presents the conclusion of a study aiming at a method to use modern drugs with homeopathic criteria. METHODS: Adverse effects as catalogued in United States Pharmacopoeia Dispensing Information Drug monographs were collected. RESULTS: A homeopathic materia medica and repertory comprising 1251 modern drugs to be employed according to the principle of therapeutic similitude was developed. CONCLUSION: Besides supplying a basis for homeopathy as a medical rationale related to scientific pharmacology, this study makes available a method that may broaden the scope of intervention of homeopathy in present day diseases.

Statins withdrawal, vascular complications, rebound effect and similitude.

Hahnemann considered the secondary action of medicines to be a law of nature and reviewed the conditions under which it occurs. It is closely related to the rebound effects observed with many modern drugs. I review the evidence of the rebound effect of statins that support the similitude principle. In view of their indications in primary and secondary prevention of cardiovascular diseases, statins are widely prescribed. Besides reducing cholesterol biosynthesis, they provide vasculoprotective effects (pleiotropic effects), including improvement of endothelial function, increased nitric oxide bioavailability, antioxidant properties, inhibition of inflammatory and thrombogenic responses, stabilisation of atherosclerotic plaques, and others. Recent studies suggest that suspension of statin treatment leads to a rebound imparing of vascular function, and increasing morbidity and mortality in patients with vascular diseases. Similarly to other classes of modern palliative drugs, this rebound effect is the same as a secondary action or vital reaction described by Samuel Hahnemann, and used in homeopathy in a therapeutic sense.

Antidepressants, suicidality and rebound effect: evidence of similitude?

BACKGROUND: Samuel Hahnemann noticed that palliative treatments for the symptoms of chronic diseases, after an initial improvement, provoked symptoms similar but stronger symptoms to those initially suppressed. He regarded this as a consequence of the vital reaction of the organism: an automatic and instinctive capacity to return to the initial health condition altered by medicines. Using this homeostatic conception of the organism as a treatment rationale, Hahnemann proposed the therapy of similarity, administering to the patients medicines capable of causing, in healthy individuals, similar symptoms to the natural disease. Based on experimental observations, he proposed that the primary action of the drug was followed by the secondary and opposite action of the organism, inaugurating homeopathic pharmacology, and alerting to the harmful consequences of palliative medicines in susceptible individuals. Such iatrogenic events can be observed in contemporary medicine, after the withdrawal of modern enantiopathic medicines, according to the study of the rebound effect or paradoxical reaction of the organism. METHOD: This study reviews the recent studies which describe suicidality after the suspension or discontinuation of second generation antidepressants according to the hypothesis of the paradoxical reaction of the organism. CONCLUSIONS: Rebound and withdrawal effects, including suicidality occur with antidepressant drugs. They are relatively rare but more intense than the primary action of the drug. The probability of such effects is influenced by patient factors including age and diagnosis, and drug factors including half-life.

Bases científicas del principio de curación homeopática en la farmacología moderna / Scientific bases of the homeopathic healing principle in modern pharmacology

La homeopatía emplea el denominado 'principio de similares' como método terapéutico ­ el cual consiste en administrar medicamentos que provocan ciertos síntomas en individuos sanos para tratar síntomas similares en individuos enfermos (similia similibus curantur) - para inducir una reacción curativa secundaria del cuerpo en contra de sus propios trastornos. Esta reacción secundaria (vital, homeostática o paradójica) del cuerpo se basa en el 'efecto de rebote' de los fármacos modernos, un tipo de evento adverso que se produce después de interrumpir varias clases de fármacos prescritos según el 'principio de los contrarios' (contraria contrariis curantur). Objetivo: La presente revisión ha buscado justificar científicamente el principio de curación homeopática frente a la farmacología clínica y experimental a través de un estudio sistemático del efecto de rebote de los fármacos modernos o reacción paradójica del cuerpo. Métodos: Empleando como referencia estudios y revisiones sobre el tema publicados a partir de 1998, actualizamos los datos añadiendo estudios recientes incluidos en la base de datos PubMed. Resultados: El efecto de rebote se produce después de interrumpir varias clases de fármacos con acción contraria a los síntomas de las enfermedades, exacerbándolos a niveles superiores a aquellos previos al tratamiento. Independientemente de la enfermedad, fármaco, dosis y duración del tratamiento, el fenómeno del rebote se manifiesta en una pequeña proporción de los individuos susceptibles. Siguiendo las premisas homeopáticas, los fármacos modernos también podrían usarse según el principio de la similitud terapéutica, empleando entonces el efecto de rebote (reacción paradójica) con propósito curativo. Conclusiones: Evidenciado por cientos de estudios que constatan la similitud de conceptos y manifestaciones, el efecto de rebote de los fármacos modernos justifica científicamente el principio de la cura homeopática. Aunque el fenómeno de rebote es un evento adverso estudiado por la farmacología moderna, no es conocido por los profesionales de la atención médica, lo cual priva a los médicos de un conocimiento indispensable para el manejo seguro de los fármacos.

Homeopathy employs the so-called 'principle of similars' as therapeutic method - which consists in administering medicines that cause certain symptoms in healthy individuals to treat similar symptoms in sick individuals (similia similibus curantur) - to induce a secondary and healing reaction by the body against its own disorders. This secondary (vital, homeostatic or paradoxical) reaction of the body is based on the 'rebound effect' of modern drugs, a type of adverse event that occurs following discontinuation of several classes of drugs prescribed according to the 'principle of contraries' (contraria contrariis curantur). Aim: The present review sought to scientifically substantiate the homeopathic healing principle vis-à-vis experimental and clinical pharmacology through a systematic study of the rebound effect of modern drugs or paradoxical reaction of the body. Methods: Employing as reference studies and revisions on the subject published since 1998, we updated the data adding recent studies included in database PubMed. Results: The rebound effect occurs after discontinuation of several classes of drugs with action contrary to the symptoms of diseases, exacerbating them to levels above the ones before treatment. Regardless of disease, drug, dose and duration of treatment, the rebound phenomenon manifests in a small proportion of susceptible individuals. Following the homeopathic premises, modern drugs might also be used according to the principle of therapeutic similitude, thus employing the rebound effect (paradoxical reaction) with curative intent. Conclusions: Evidenced by hundreds of studies that attest to the similarity of concepts and manifestations, the rebound effect of modern drugs scientifically substantiates the principle of homeopathic cure. Although the rebound phenomenon is an adverse event studied by modern pharmacology, it is not known by health care professionals, thus depriving doctors of knowledge indispensable for safe management of drugs.

Formación médica en la terapéutica no convencional en el mundo (homeopatía y acupuntura) / Medical training in non-conventional therapeutics in the world (homeopathy and acupuncture)

Utilizadas de forma complementaria, alternada o integrada con la medicina convencional, la demanda de la población por las terapias no convencionales se ha incrementado considerablemente en las últimas décadas, requiriendo de los médicos un conocimiento de las nociones básicas de tales enfoques terapéuticos para orientar a sus pacientes en relación con tratamientos distintos a aquellos que suelen prescribir. Entre las mismas, la homeopatía y la acupuntura se han considerado especialidades médicas en Brasil durante varias décadas. Objetivo: Describir el estado actual de la formación médica en terapias no convencionales (homeopatía y acupuntura) alrededor del mundo. Métodos: Actualizamos los datos relacionados con los estudios y revisiones publicados hasta 2013 a través de una revisión de los estudios más recientes incluidos en la base de datos PubMed. Resultados: En todos los países, la enseñanza de terapias no convencionales se considera un tema relevante para la formación de médicos como una función del creciente interés de la población en su uso, con un amplia variedad de enfoques dirigidos a los estudiantes de licenciatura y posgrado, médicos residentes y profesionales con otras especialidades médicas. Conclusiones: Las escuelas brasileñas de medicina deben proporcionar a los estudiantes de licenciatura y posgrado, así como a los médicos residentes, un conocimiento preciso de los supuestos teóricos y enfoques clínico-terapéuticos propios de la homeopatía y la acupuntura, entre otras terapias no convencionales.

Used as complementary to, alternating or integrated with mainstream medicine, the population's demand for non-conventional therapies has substantially increased in the past decades, requiring from doctors knowledge on the basic notions of such therapeutics to orient their patients regarding treatments different to the ones they usually prescribe. Among them, homeopathy and acupuncture are considered medical specialties in Brazil for various decades. Aim: To describe the current state of medical education in non-conventional therapies (homeopathy and acupuncture) around the world. Methods: We updated data resulting from studies and reviews published until 2013 through a review of more recent studies included in database PubMed. Results: In all countries the teaching of non-conventional therapies is considered a relevant topic for the training of doctors as a function of the increasing interest of the population in their use, with a broad range of approaches targeting undergraduate and graduate students, medical residents and doctors from other medical specialties. Conclusions: The Brazilian medical schools must provide undergraduate and graduate students and medical residents accurate knowledge on the theoretical assumptions and clinical-therapeutic approaches proper to homeopathy and acupuncture, among other non-conventional therapies.

Para aquellos que demandan evidencias científicas de la homeopatía [Editorial] / For those who demand scientific evidence of homeopathy [Editorial]

El dossier comienza con una revisión titulada "Homeopatía: una breve descripción de esta especialidad médica", que aborda los aspectos históricos, sociales y políticos de la institucionalización de la homeopatía en Brasil y su inclusión en los sistemas de atención médica. Además, describe las razones por las que los pacientes buscan este enfoque terapéutico. La revisión "Formación médica en la terapéutica no convencional en el mundo (homeopatía y acupuntura)" enfatiza la relevancia de la inclusión de la homeopatía y la acupuntura en el plan de estudios de las escuelas de medicina en muchos países alrededor del mundo. Tal inclusión ­ actualizada a través de distintas modalidades específicas para estudiantes de licenciatura y posgrado, médicos residentes y médicos en ejercicio ­ es resultado del creciente interés de los pacientes, el cual conduce a un interés similar entre los médicos por aprender sobre tales formas de medicina. Con el objetivo de proporcionar fundamentos científicos al principio de similitud terapéutica a través del estudio sistemático del efecto de rebote de los fármacos modernos, la revisión titulada "Bases científicas del principio de curación homeopática en la farmacología moderna" aborda cientos de estudios publicados en revistas científicas de alto impacto que demuestran una similitud conceptual y fenomenológica entre el efecto de rebote y la reacción vital (o acción secundaria) que desencadena el tratamiento homeopático. Para ampliar las implicaciones de dicha similitud, el autor describe el uso de los fármacos modernos con base en el principio de similitud terapéutica, conduciendo a la aplicación del efecto de rebote (reacción paradójica del cuerpo) con intención curativa. Para dar cuenta de la plausibilidad del uso homeopático de las diluciones altas (HD), el presente dossier incluye tres revisiones que describen los avances realizados en investigación fundamental a lo largo de las últimas décadas: "La solidez de la investigación homeopática fundamental", "Efectos de las diluciones homeopáticas altas sobre los modelos in vitro: revisión de la literatura" y "Efectos de las diluciones homeopáticas altas sobre las plantas: revisión de la literatura". Tales revisiones abordan cientos de experimentos y docenas de líneas de investigación que demuestran en conjunto los efectos de las diluciones altas (HD) en los modelos físico-químicos y biológicos (in vitro, en plantas y animales).

Efectos de las diluciones homeopáticas altas sobre las plantas: revisión de la literatura / Effects of high homeopathic dilutions on plants: a review of the literature

Entre los supuestos no convencionales de la homeopatía, el uso de medicamentos en diluciones altas (HD, por sus siglas en inglés) es una causa de objeciones y escepticismo entre la comunidad científica, formada dentro del paradigma de la dependencia de la dosis de la farmacología clásica. La investigación que busca evidenciar los efectos de las HD homeopáticas recurre a varios modelos experimentales (in vitro, plantas y animales). Objetivo: Describir los resultados de estudios con alta calidad metodológica que han demostrado los efectos positivos de las HD homeopáticas sobre las plantas. Métodos: Tomando como fuente de referencia las revisiones publicadas hasta 2015, actualizamos la información añadiendo datos de estudios recientes incluidos en la base de datos PubMed. Resultados: De los 167 estudios experimentales analizados, 48 cumplieron los criterios mínimos de calidad metodológica, de los cuales 29 detectaron efectos específicos de las diluciones homeopáticas altas sobre las plantas mediante la comparación con controles adecuados. Conclusiones: A pesar de que la mayor parte de los experimentos presentaba una calidad metodológica por debajo del estándar, los estudios que emplearon sistemáticamente reproducibilidad y controles negativos demostraron indiscutibles efectos significativos de las HD homeopáticas sobre las plantas.

Among the non-conventional assumptions of homeopathy, the use of medicines in high dilutions (HD) is a cause for objections and skepticism among the scientific community, trained within the dose-dependency paradigm of classic pharmacology. Research aiming at evidencing the effects of homeopathic HD has resource to several experimental models (in vitro, plants and animals). Aim: To describe the results of studies with high methodological quality that demonstrated positive effects of homeopathic HD on plants. Methods: Taking reviews published until 2015 as reference source, we updated the information through addition of data from recent studies included in database PubMed. Results: From 167 experimental studies analyzed, 48 met the minimum criteria of methodological quality, from which 29 detected specific effects of homeopathic high dilutions on plants through comparison to adequate controls. Conclusions: Despite the substandard methodological quality of most experiments, studies with systematic use of negative controls and reproducibility demonstrated significant indisputable effects of homeopathic HD on plants.