Effects of Flaxseed Oil on Serum Bone Turnover Markers in Hemodialysis Patients: a Randomized Controlled Trial.

INTRODUCTION: Chronic kidney disease-mineral and bone disorder is a common complication in hemodialysis patients. The present study was designed to investigate the effects of flaxseed oil, a rich source of plant omega-3 fatty acid alpha-linolenic acid, on serum markers of bone formation and resorption in hemodialysis patients. MATERIALS AND METHODS: In this randomized controlled trial, 34 hemodialysis patients were randomly assigned to either the flaxseed oil or the control group. The patients in the flaxseed oil group received 6 g/d of flaxseed oil for 8 weeks, whereas the control group received 6 g/d of medium chain triglycerides oil. At baseline and the end of the 8th week, 7 mL of blood was obtained from each patient after a 12- to 14-hour fast and serum concentrations of osteocalcin, osteoprotegerin, N-telopeptide, and receptor activator of nuclear factor kappa B ligand were measured. RESULTS: Serum N-telopeptide concentration decreased significantly up to 17% in the flaxseed oil group at the end of week 8, as compared to baseline (P < .01), and the reduction was significant in comparison with the control group. There were no significant differences between the two groups in the mean changes of serum osteocalcin, osteoprotegerin, or receptor activator of nuclear factor kappa B ligand. CONCLUSIONS: This study indicates that daily consumption of 6 g/d of flaxseed oil may reduce bone resorption in hemodialysis patients.

Flaxseed Oil Attenuates Intestinal Damage and Inflammation by Regulating Necroptosis and TLR4/NOD Signaling Pathways Following Lipopolysaccharide Challenge in a Piglet Model.

SCOPE: Flaxseed oil is a rich source of α-linolenic acid (ALA), which is the precursor of the long-chain n-3 polyunsaturated fatty acids (PUFAs), including docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). This study investigates the protective effect of flaxseed oil against intestinal injury induced by lipopolysaccharide (LPS). MATERIALS AND RESULTS: Twenty-four weaned pigs were used in a 2 × 2 factorial experiment with dietary treatment (5% corn oil vs 5% flaxseed oil) and LPS challenge (saline vs LPS). On day 21 of the experiment, pigs were administrated with LPS or saline. At 2 h and 4 h post-administration, blood samples were collected. After the blood harvest at 4 h, all piglets were slaughtered and intestinal samples were collected. Flaxseed oil supplementation led to the enrichment of ALA, EPA, and total n-3 PUFAs in intestine. Flaxseed oil improved intestinal morphology, jejunal lactase activity, and claudin-1 protein expression. Flaxseed oil downregulated the mRNA expression of intestinal necroptotic signals. Flaxseed oil also downregulated the mRNA expression of intestinal toll-like receptors 4 (TLR4) and its downstream signals myeloid differentiation factor 88 (MyD88), nuclear factor kappa B (NF-κB), and nucleotide-binding oligomerization domain proteins 1, 2 (NOD1, NOD2) and its adapter molecule, receptor-interacting protein kinase 2 (RIPK2). CONCLUSION: These results suggest that dietary addition of flaxseed oil enhances intestinal integrity and barrier function, which is involved in modulating necroptosis and TLR4/NOD signaling pathways.

Maternal flaxseed oil intake during lactation changes body fat, inflammatory markers and glucose homeostasis in the adult progeny: role of gender dimorphism.

We evaluated maternal flaxseed oil intake during lactation on body composition, lipid profile, glucose homeostasis and adipose tissue inflammation in male and female progeny at adulthood. Lactating rats were divided into the following: control 7% soybean oil (C), hyper 19% soybean oil (HS) and hyper 17% flaxseed oil+2% soybean oil (HF). Weaned pups received a standard diet. Offspring were killed in PN180. Male HF presented higher visceral adipose tissue (VAT) and triacylglycerol, and female HF showed insulin resistance. Both male and female HF had hyperleptinemia, and only male HF had hyperprolactinemia. In VAT, male HF presented lower PPAR-γ expressions and higher TNF-α, IL-6, IL-1ß and IL-10 expressions; in subcutaneous adipose tissue (SAT), they presented lower PPAR-γ and TNF-α expressions. Female HF presented higher leptin, as well as lower adiponectin, TNF-α, IL-6 and IL-1ß expressions in VAT and lower TNF-α in SAT. Flaxseed oil during lactation leads to gender-specific effects with more adiposity and dyslipidemia in male and insulin resistance in female. Higher prolactin and inflammatory cytokines in male could play a role in these gender differences. We suggest that the use of flaxseed oil during lactation increases metabolic syndrome risk in the adult progeny.

Effect of Flaxseed Intervention on Inflammatory Marker C-Reactive Protein: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

Functional food-flaxseed and its derivatives (flaxseed oil or lignans) are beneficial for human health, possibly because of their anti-inflammatory effects. C-reactive protein (CRP), a sensitive marker of inflammation was chosen to evaluate the anti-inflammatory effects of flaxseed. We searched randomized controlled trials from PubMed and the Cochrane Library in October 2015 and conducted a meta-analysis to evaluate the effectiveness of flaxseed and its derivatives on CRP. The mean differences (net change) in CRP (mg/L) concentrations were pooled with a random- or a fixed-effects model depending on the results of heterogeneity tests. Overall, flaxseed interventions had no effects on reduction of CRP (p = 0.428). The null effects were consistent in the subgroup analysis with multiple studies and population characteristics. Significant heterogeneity was observed in most of the analyses. Meta-regression identified baseline body mass index (BMI) as a significant source of heterogeneity (P-interaction = 0.032), with a significant reduction in CRP of 0.83 mg/L (95% confidence interval -1.34 to -0.31; p = 0.002) among subjects with a BMI of ≥30 kg/m². In conclusion, our meta-analysis did not find sufficient evidence that flaxseed and its derivatives have a beneficial effect on reducing circulating CRP. However, they may significantly reduce CRP in obese populations.

Omega-3 polyunsaturated fatty acids in treating non-alcoholic steatohepatitis: A randomized, double-blind, placebo-controlled trial.

BACKGROUND: & aims: Few clinical trials have addressed the potential benefits of omega-3 polyunsaturated fatty acids (PUFAs) on non-alcoholic steatohepatitis (NASH). We evaluated the effects of supplementation with omega-3 PUFAs from flaxseed and fish oils in patients with biopsy-proven NASH. METHODS: Patients received three capsules daily, each containing 0.315 g of omega-3 PUFAs (64% alpha-linolenic [ALA], 16% eicosapentaenoic [EPA], and 21% docosahexaenoic [DHA] acids; n-3 group, n = 27) or mineral oil (placebo group, n = 23). Liver biopsies were evaluated histopathologically by the NASH activity score (NAS). Plasma levels of omega-3 PUFAs were assessed as a marker of intake at baseline and after 6 months of treatment. Secondary endpoints included changes in plasma biochemical markers of lipid metabolism, inflammation, and liver function at baseline and after 3 and 6 months of treatment. RESULTS: At baseline, NAS was comparable between the groups (p = 0.98). After intervention with omega-3 PUFAs, plasma ALA and EPA levels increased (p ≤ 0.05). However in the placebo group, we also observed increased EPA and DHA (p ≤ 0.05), suggesting an off-protocol intake of PUFAs. NAS improvement/stabilization was correlated with increased ALA in the n-3 group (p = 0.02) and with increased EPA (p = 0.04) and DHA (p = 0.05) in the placebo group. Triglycerides were reduced after 3 months in the n-3 group compared to baseline (p = 0.01). CONCLUSIONS: In NASH patients, the supplementation of omega-3 PUFA from flaxseed and fish oils significantly impacts on plasma lipid profile of patients with NASH. Plasma increase of these PUFAs was associated with better liver histology. (ID 01992809).

Lipídios estruturados obtidos por interesterificação da tributirina com óleo de linhaça e seu potencial quimiopreventivo durante a fase de promoção inicial da hepatocarcinogênese experimental em ratos / Structured lipids obtained from intersterification of tributyrin and flax seed oil and their chemopreventive potential during early promotion phase of experimental hepatocarcinogenesis in rats

A combinação de agentes quimiopreventivos com diferentes mecanismos de ação tem sido considerada uma estratégia promissora para a prevenção do câncer. Dentre os diversos compostos bioativos em alimentos, destacam-se a tributirina, um pró-fármaco do ácido butírico presente em laticínios e produzido pela fermentação de fibras dietéticas, e o óleo de linhaça, fonte de ácido alfa linolênico. Nesse contexto, foi avaliada a atividade quimiopreventiva de lipídios estruturados obtidos a partir da interesterificação enzimática de tributirina e óleo de linhaça durante a fase de promoção inicial da hepatocarcinogênese experimental. Ratos Wistar machos submetidos ao modelo do hepatócito resistente receberam diariamente, por via intragástrica (i.g), maltodextrina, óleo de linhaça, tributirina, a mistura não esterificada ou lipídios estruturados durante a fase de promoção inicial. O tratamento com lipídios estruturados demonstrou atividade quimiopreventiva comparável à da tributirina, mesmo resultando em menor concentração hepática de ácido butírico. Tanto a tributirina quanto os lipídios estruturados não inibiram a proliferação celular em lesões preneoplásicas, mas induziram a apoptose naquelas em remodelação. Os efeitos inibitórios da tributirina em fases iniciais da hepatocarcinogênese experimental estão relacionados ao aumento da acetilação de histonas e à modulação de processos de translocação nuclear da p53. No presente estudo, foi observado aumento substancial da razão nuclear/citoplasmática de p53 e importina-alfa em fígados de animais submetidos ao modelo e tratados com tributirina, mas não nos tratados com lipídios estruturados. Por outro lado, o tratamento com lipídios estruturados reduziu a expressão dos oncogenes Bcl2, Ccnd2, Pdgfa, Vegfa e aumentou a expressão dos genes supressores de tumor Cdh13, Fhit e Socs3. Assim, embora o potencial quimiopreventivo dos lipídios estruturados seja comparável ao da tributirina, os resultados sugerem que o novo composto não exibe atividade de HDACi, e que seus efeitos inibitórios na hepatocarcinogênese possam ser atribuídos à modulação da expressão de oncogenes e genes supressores de tumor

Combination of chemopreventive agents with different mechanisms of action has been considered a promising strategy to cancer prevention. Among several bioactive food compounds, tributyrin, a butyric acid prodrug obtained from dairy products and dietetic fiber fermentation, and flax seed oil, a rich source of alpha linolenic acid have shown chemopreventive potential. Here, we evaluated the chemopreventive activity of structured lipids obtained by enzymatic interesterification of tributyrin and flax seed oil during the early promotion phase of experimental hepatocarcinogenesis. Male Wistar rats subjected to the resistant hepatocyte model were treated daily, i.g, with maltodextrin, flax seed oil, tributyrin, non-sterified blend, or structured lipids. Treatment structured lipids showed similar chemopreventive activity compared to tributyrin, even when structured lipids yielded lower concentrations of butyric in the liver. Tributyrin and structured lipids did not inhibit cell proliferation in preneoplastic lesions, but both of them induced apoptosis in remodeling preneoplastic lesions. In addition, histone acetylation and p21 restored expression tributyrin molecular mechanisms were related to modulation of p53 nuclear shuttling mechanisms. In the present study, it was observed a substantial increase in p53 nuclear/cytoplasmic ratio and importin-alpha in preneoplastic livers of tributyrin treated rats, but not in those treated with structured lipids. In contrast, treatment structured lipids downregulated expression of major oncogenes Bcl2, Ccnd2, Pdgfa, and Vegfa; and upregulated expression of critical tumor suppressor genes, Cdh13, Socs3 and Fhit. Hence, although structured lipids and tributyrin show similar chemopreventive potential, the results suggest that the new compound does not exhibit HDACi activity, and that its inhibitory effects may be attributed to the modulation of oncogenes and tumor suppressor genes expression

Effects of abomasal infusion of flaxseed (Linum usitatissimum) oil on microbial ß-glucuronidase activity and concentration of the mammalian lignan enterolactone in ruminal fluid, plasma, urine and milk of dairy cows.

Ruminal microbiota plays an important role in the conversion of plant lignans into mammalian lignans. The main mammalian lignan present in the milk of dairy cows fed flax products is enterolactone (EL). The objectives of the present study were to investigate the effects of abomasal infusion of flax oil on the metabolism of flax lignans and concentrations of EL in biological fluids of dairy cows. A total of six rumen-cannulated dairy cows were assigned within a 2 × 3 factorial arrangement of six treatments utilising flax hulls (0 and 15·9 % of DM) and abomasal infusion of flax oil (0, 250 and 500 g/d). There were six periods of 21 d each. Samples were collected during the last 7 d of each period and subjected to chemical analysis. Flax hull supplementation increased concentrations of EL in ruminal fluid, plasma, urine and milk, while flax oil infusion had no effect. Post-feeding, ß-glucuronidase activity in the ruminal fluid of cows infused with 250 g flax oil was significantly lower for cows fed hulls than for those fed the control diet. The present study demonstrated that the presence of a rich source of n-3 fatty acids such as flax oil in the small intestine does not interfere with the absorption of the mammalian lignan EL and that lower ruminal ß-glucuronidase activity had no effect on the conversion of flax lignans into EL in the rumen of dairy cows.

Effect of dietary grape seed extract and Cistus ladanifer L. in combination with vegetable oil supplementation on lamb meat quality.

Thirty-six Merino Branco lambs were assigned to six dietary treatments: control diet (C) consisting of 90% dehydrated lucerne and 10% wheat bran; C with 6% of oil blend (CO); C with 2.5% of grape seed extract (GS); GS with 6% of oil blend (GSO); C with 25% of Cistus ladanifer (CL), and CL with 6% of oil blend (CLO). Meat lipid and colour stability was then evaluated during 7 days of storage. The effect of inclusion of grape seed extract and C. ladanifer in diets on meat sensory properties was also evaluated. Meat antioxidant potential, determined after oxidation induction by a ferrous/hydrogen peroxide system, decreased with oil supplementation (P<0.001), but inclusion of grape seed extract and C. ladanifer in diets protected the meat against lipid oxidation (P=0.036). Meat colour was not affected by diets. Inclusion of grape seed extract and C. ladanifer in diets did not change the sensory properties of meat.

Lipid and protein oxidation of α-linolenic acid-enriched pork during refrigerated storage as influenced by diet supplementation with olive leaves (Olea europea L.) or α-tocopheryl acetate.

The objective of this study was to evaluate the effect of diet supplementation with olive leaves or α-tocopheryl acetate on lipid and protein oxidation of raw and cooked n-3 enriched-pork during refrigerated storage. Enrichment of pork with α-linolenic acid through diet supplementation with linseed oil enhanced (p≤0.05) lipid oxidation in both raw and cooked chops but had no effect (p>0.05) on protein oxidation during refrigerated storage while decreasing (p≤0.05) the sensory attributes of cooked pork. Diet supplementation with olive leaves or α-tocopheryl acetate had no effect (p>0.05) on the fatty acid composition of pork but decreased (p≤0.05) lipid oxidation while exerting no effect (p>0.05) on protein oxidation in both raw and cooked α-linolenic acid-enriched chops stored and chilled for 9 days. Moreover, olive leaves and α-tocopheryl acetate supplemented at 10 g/kg and 200mg/kg diet, respectively, exerted (p≤0.05) a beneficial effect on the sensory attributes of cooked α-linolenic acid-enriched pork chops.

Effect of flaxseed oil fortified with vitamin E and phytosterols on antioxidant defense capacities and lipids profile in rats.

UNLABELLED: The main proposal of this study was to evaluate in vivo whether flaxseed oils fortified with micronutrients would have beneficial effects on lipid profile and antioxidant status in high-fat fed rats. Male Wistar rats were fed synthetic diets containing 10% of flaxseed oil (FO), phytosterols (PS) fortified FO (PS-FO), vitamin E (V(E)) fortified FO (V(E)-FO), V(E) , and PS fortified FO (V(E)-PS-FO), respectively, for 4 wk. The results showed that V(E) fortified FO enhanced the enzymatic (SOD and GPX) and nonenzymatic (GSH and V(E)) antioxidant system, lowered the lipid peroxide (TBARS) concentration compared with FO (P < 0.05). And FO fortified with PS significantly reduced the plasma TG, TC and LDL-C levels, and hepatic TG and TC levels of rats compared with FO (P < 0.05), but had no significant effect on antioxidant defense capacities. Combined addition of V(E) and PS in FO had a synergetic effect. These results indicated that flaxseed oils fortified micronutrients V(E) and PS may contribute to reduce the risk factors of cardiovascular disease (CVD) by improving plasma antioxidant defenses and lipids profiles. PRACTICAL APPLICATION: Flaxseed oil usually contains greater than 50% of alpha-linolenic acid (ALA) and is a desire origin for n-3 PUFA. But consuming high dose of n-3 PUFA could lead to oxidative damage through free radical-chain reaction in cellular and subcellular membranes. Our studies showed that a regular intake of V(E) and PS fortified flaxseed oils increased antioxidant defenses and ameliorated lipids profile in high-fat fed rats, and these indicated that the flaxseed oil fortified with these micronutrients might reduce the incidence of CVD.

Safety and efficacy of antioxidants-loaded nanoparticles for an anti-aging application.

The aim of this work was to perform a pilot study on the safety and efficacy of nanoparticle formulation for cosmetic application. The encapsulated actives in the nanoparticles were a blend of coenzyme Q10, retinyl palmitate, tocopheryl acetate, grape seed oil and linseed oil. The nanoparticle suspension was characterized in terms of pH and particle size. For the safety assessment, alternative methods as cytotoxicity and HET CAM were used. The clinical skin compatibility tests were also performed. The efficacy was evaluated in healthy volunteers presenting different degrees of periorbital wrinkles. Skin hydration was performed by corneometry. The nanoparticles presented narrow size around 140 nm and pH close to neutral and were suitable to cutaneous application. The alternative tests demonstrated that the nanoparticles did not present potential to induce skin irritant effects, cytotoxicity or generate oxidative stress. The clinical assays confirmed the in vitro results, demonstrating the safety of the nanoparticles, which were not irritant, sensitizing and comedogenic. Furthermore, the exposure to UVA light did not cause photoxicity. Regarding the efficacy, nanoparticles presented significant reduction in wrinkle degree after 21 days of application compared to the control. The volunteers could differentiate the nanoparticles and the control product by means of subjective analyses. In conclusion, the nanoparticles containing antioxidant actives were safe for topical use and presented anti-aging activity in vivo and are suitable to be used as cosmetic ingredient.

Linseed oil: an investigation of its antiarthritic activity in experimental models.

Food sources rich in omega-3 fatty acids have been valued for their beneficial effect in the management of inflammatory disorders. The present study evaluates the antiarthritic and immunomodulatory activity of Linum usitatissimum fixed oil (LUFO) in experimental models. The LUFO produced a dose-dependent reduction in joint swelling and circulating TNF-α levels in both preventive and curative protocols of arthritis induced by complete Freund's adjuvant (CFA). Expression of TNF-R1 and Interleukin (IL) 6 proteins in the arthritic paw was also significantly reduced in the LUFO-treated animals. In the cotton pellet induced granuloma model, LUFO treatment significantly reduced the dry granuloma weight as compared with the control group. Results of our present study thus demonstrate the antiarthritic and disease modifying activity of LUFO. We believe that dietary incorporation of LUFO may be beneficial in the prevention and management of rheumatoid arthritis and other chronic inflammatory disorders.

High-fat diets affect energy and bone metabolism in growing rats.

BACKGROUND: High-fat diets are usually associated with greater weight (W) gain and body fat (BF). However, it is still unclear whether the type and amount of fat consumed influence BF. Additionally, dietary fat intake may also have consequences on skeletal health. OBJECTIVE: To evaluate in healthy growing rats the effects of high-fat diets and type of dietary fat intake (saturated or vegetable oils) on energy and bone metabolism. METHODS: At weaning, male Wistar rats (n = 50) were fed either a control diet (C; fat = 7% w/w) or a high-fat diet (20% w/w) containing either: soybean oil, corn oil (CO), linseed oil (LO), or beef tallow (BT) for 8 weeks. Zoometric parameters, BF, food intake and digestibility, and total and bone alkaline phosphatase (b-AP) were assessed. Total skeleton bone mineral density (BMD) and content (BMC), BMC/W, spine BMD, and bone volume (static-histomorphometry) were measured. RESULTS: Animals fed BT diet achieved lower W versus C. Rats fed high-fat vegetable oil diets showed similar effects on the zoometric parameters but differed in BF. BT showed the lowest lipid digestibility and BMC. In contrast, high vegetable oil diets produced no significant differences in BMC, BMC/W, BMD, spine BMD, and bone volume. Marked differences were observed for LO and BT groups in b-AP and CO and BT groups in bone volume. CONCLUSION: BT diet rich in saturated fatty acids had decreased digestibility and adversely affected energy and bone metabolisms, in growing healthy male rats. There were no changes in zoometric and bone parameters among rats fed high vegetable oil diets.

Randomized, placebo-controlled trial of flax oil in pediatric bipolar disorder.

OBJECTIVES: This clinical trial evaluated whether supplementation with flax oil, containing the omega-3 fatty acid alpha-linolenic acid (alpha-LNA), safely reduced symptom severity in youth with bipolar disorder. METHODS: Children and adolescents aged 6-17 years with symptomatic bipolar I or bipolar II disorder (n = 51), manic, hypomanic, mixed, or depressed, were randomized to either flax oil capsules containing 550 mg alpha-LNA per 1 gram or an olive oil placebo adjunctively or as monotherapy. Doses were titrated to 12 capsules per day as tolerated over 16 weeks. Primary outcomes included changes in the Young Mania Rating Scale, Child Depression Rating Scale-Revised, and Clinical Global Impressions-Bipolar ratings using Kaplan-Meier survival analyses. RESULTS: There were no significant differences in primary outcome measures when compared by treatment assignment. However, clinician-rated Global Symptom Severity was negatively correlated with final serum omega-3 fatty acid compositions: %alpha-LNA (r = -0.45, p < 0.007), % eicosapentaenoic acid (EPA) (r = -0.47, p < 0.005); and positively correlated with final arachidonic acid (AA) (r = 0.36, p < 0.05) and docosapentaenoic acid (DPA) n-6 (r = 0.48, p < 0.004). The mean duration of treatment for alpha-LNA was 11.8 weeks versus 8 weeks for placebo; however, the longer treatment duration for alpha-LNA was not significant after controlling for baseline variables. Subjects discontinued the study for continued depressive symptoms. CONCLUSIONS: Studies of essential fatty acid supplementation are feasible and well tolerated in the pediatric population. Although flax oil may decrease severity of illness in children and adolescents with bipolar disorder who have meaningful increases in serum EPA percent levels and/or decreased AA and DPA n-6 levels, individual variations in conversion of alpha-LNA to EPA and docosahexaenoic acid as well as dosing burden favor the use of fish oil both for clinical trials and clinical practice. Additionally, future research should focus on adherence and analysis of outcome based on changes in essential fatty acid tissue compositions, as opposed to group randomization alone.

Efeito do consumo de óleo de linhaça e de vitamina E no desempenho e nas características de carcaças de frangos de corte / Effect of linseed oil and vitamin E consumption on poultry performance and carcass traits

Foi avaliado o efeito da utilização de óleo de linhaça na ração, em substituição ao óleo de soja em diferentes proporções, e de vitamina E, até o nível de 400mg/kg de ração, sobre o desempenho e a composição de carcaça de frangos de corte. O desempenho produtivo foi avaliado com base em pesagens das aves e da ração aos 21 e 49 dias de idade. No 49º dia, as aves foram abatidas, e os rendimentos de carcaça e dos principais cortes comerciais e a porcentagem de vísceras e de gordura abdominal foram avaliados. A composição da fração oleosa da ração, de forma geral, não interferiu nos parâmetros de desempenho avaliados (P>0,05). Os machos consumiram mais ração e ganharam mais peso que as fêmeas (P<0,01). As fêmeas apresentaram, em geral, pior conversão alimentar, associada à maior deposição de gordura abdominal. Os machos apresentaram maior porcentagem de coxa com sobrecoxa em relação ao peso da carcaça eviscerada, e as fêmeas apresentaram maior porcentagem de peito. A porcentagem de asas e vísceras não diferiu entre os sexos.

The effect of the utilization of linseed oil at different concentrations in poultry feed instead of soy oil and the effect of vitamin E administration up to 400mg/kg feed on performance and carcass traits of broilers was investigated. Productive parameters were determined by weighting birds and rations at 21 and 49 days of experiment. Broilers were slaughtered on the 49th day of the experiment for the evaluation of yields of carcass and main cuts, percentages of viscera and abdominal fat. The oil composition of rations did not influence the performance of the broilers (P>0.05). Male broilers had higher feed consumption and weight gain (P<0.05). Female broilers showed worse feed conversion and higher deposition of abdominal fat (P<0.05). Male broilers also had higher percentages of legs and forelegs in relation the weight of the eviscerated carcass while females showed higher breast percentage (P<0.05). Percentages of wings and viscera did not differ between genders (P>0.05).

Effect of baseline plasma fatty acids on eicosapentaenoic acid levels in individuals supplemented with alpha-linolenic acid.

We previously reported a >50% increase in mean plasma eicosapentaenoic acid levels in a general medicine clinic population after supplementation with alpha-linolenic acid. In the current analysis, we evaluate the variability of changes in eicosapentaenoic acid levels among individuals supplemented with alpha-linolenic acid and evaluated the impact of baseline plasma fatty acids levels on changes in eicosapentaenoic acid levels in these individuals. Changes in eicosapentaenoic acid levels among individuals supplemented with alpha-linolenic acid ranged from a 55% decrease to a 967% increase. Baseline plasma fatty acids had no statistically significant effect on changes in eicosapentaenoic levels acid after alpha-linolenic acid supplementation. Changes in eicosapentaenoic acid levels varied considerably in a general internal medicine clinic population supplemented with alpha-linolenic acid. Factors that may impact changes in plasma eicosapentaenoic acid levels after alpha-linolenic acid supplementation warrant further study.

Flax and flaxseed oil (Linum usitatissimum): a review by the Natural Standard Research Collaboration.

The objective of this study was to evaluate the scientific evidence on flaxseed, including expert opinion, folkloric precedent, history, pharmacology, kinetics/dynamics, interactions, adverse effects, toxicology, and dosing. Electronic searches were conducted in 9 databases, 20 additional journals (not indexed in common databases), and bibliographies from 50 selected secondary references. No restrictions were placed on the language or quality of the publications. All literature collected pertained to efficacy in humans, dosing, precautions, adverse effects, use in pregnancy/lactation, interactions, alteration of laboratory assays, and mechanisms of action. Standardized inclusion/exclusion criteria are used for selection. Grades were assigned using an evidence-based grading rationale. A review of the literature on flaxseed yielded 13 categories for which flaxseed had been studied in humans, including constipation/laxative, attention-deficit hyperactivity disorder, hyperlipidemia, atherosclerosis/coronary artery disease, breast cancer, cyclic mastalgia (breast pain), menopausal symptoms, hyperglycemia/diabetes, hypertension, lupus nephritis, human immunodeficiency virus/acquired immune deficiency syndrome (HIV/AIDS), and prostate cancer. Most of the available evidence investigates the efficacy of alpha-linoleic acid found in flaxseed compared with fish oil, and almost all of the available studies are poor quality. Although flaxseed and flaxseed oil have several promising future uses, the available literature does not support recommendation for any condition at this time.