Daily consumption of Indian spinach (Basella alba) or sweet potatoes has a positive effect on total-body vitamin A stores in Bangladeshi men.
Am J Clin Nutr
; 80(3): 705-14, 2004 Sep.
Article
in En
| MEDLINE
| ID: mdl-15321812
ABSTRACT
BACKGROUND:
Recent evidence suggests that the vitamin A equivalency of beta-carotene from plant sources is lower than previously estimated.OBJECTIVE:
We assessed the effect of 60 d of daily supplementation with 750 microg retinol equivalents (RE) of either cooked, puréed sweet potatoes; cooked, puréed Indian spinach (Basella alba); or synthetic sources of vitamin A or beta-carotene on total-body vitamin A stores in Bangladeshi men.DESIGN:
Total-body vitamin A stores in Bangladeshi men (n = 14/group) were estimated by using the deuterated-retinol-dilution technique before and after 60 d of supplementation with either 0 microg RE/d (white vegetables) or 750 microg RE/d as sweet potatoes, Indian spinach, retinyl palmitate, or beta-carotene (RE = 1 microg retinol or 6 microg beta-carotene) in addition to a low-vitamin A diet providing approximately 200 microg RE/d. Mean changes in vitamin A stores in the vegetable and beta-carotene groups were compared with the mean change in the retinyl palmitate group to estimate the relative equivalency of these vitamin A sources.RESULTS:
Overall geometric mean (+/-SD) initial vitamin A stores were 0.108 +/- 0.067 mmol. Relative to the low-vitamin A control group, the estimated mean changes in vitamin A stores were 0.029 mmol for sweet potato (P = 0.21), 0.041 mmol for Indian spinach (P = 0.033), 0.065 mmol for retinyl palmitate (P < 0.001), and 0.062 mmol for beta-carotene (P < 0.002). Vitamin A equivalency factors (beta-caroteneretinol, wtwt) were estimated as approximately 131 for sweet potato, approximately 101 for Indian spinach, and approximately 61 for synthetic beta-carotene.CONCLUSION:
Daily consumption of cooked, puréed green leafy vegetables or sweet potatoes has a positive effect on vitamin A stores in populations at risk of vitamin A deficiency.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Vitamin A
/
Vitamin A Deficiency
/
Beta Carotene
/
Magnoliopsida
/
Ipomoea batatas
Type of study:
Clinical_trials
Limits:
Adolescent
/
Adult
/
Humans
/
Male
Country/Region as subject:
Asia
Language:
En
Journal:
Am J Clin Nutr
Year:
2004
Document type:
Article
Affiliation country:
United States