Conclusion Although , serum 25(OH)D concentrations after supplementation reached sufficiency was observed , muscle strength did not significantly improve at this point of current meta- analysis .
Background The purpose of this systematic review and meta- analysis is to investigate the effects of vitamin D3 supplementation on skeletal muscle strength in athletes .
Vitamin D3 supplements or vitamin D3 fortified foods always have cl aims for bringing people health benefits including bone and muscle health .
An up-to- date rigorous systematic review and meta- analysis is important to better underst and the effect of vitamin D3 supplementation on muscle strength .
Ergocalciferol from mushrooms or supplements consumed with a standard meal increases 25-hydroxyergocalciferol but decreases 25-hydroxycholecalciferol in the serum of healthy adults.
Few foods contain ergocalciferol or cholecalciferol . Treatment of mushrooms with UV light increases ergocalciferol content and could provide a dietary source of vitamin D. We evaluated the impact of consuming UV-treated white button mushrooms ( Agaricus bisporus ) on the vitamin D status of healthy adults . Thirty-eight volunteers were r and omized to 4 treatments consumed with a st and ard meal for 6 wk : the control ( C ) group received untreated mushrooms providing 0.85 μg/d ergocalciferol ( n = 10 ) ; groups M1 and M2 received UV-treated mushrooms providing 8.8 ( n = 10 ) and 17.1 μg/d ( n = 9 ) , respectively ; and the supplement ( S ) group received purified ergocalciferol plus untreated mushrooms , providing a total of 28.2 μg/d ( n = 9 ) . Serum total 25-hydroxyvitamin D [ 25(OH)D ] and 25-hydroxyergocalciferol [ 25(OH)D2 ] were 83 ± 38 and 2.4 ± 2.0 nmol/L , respectively , at baseline ( mean ± SD ) . At wk 6 , 25(OH)D2 had increased and was higher in all treatment groups than in the C group , whereas 25-hydroxycholecalciferol [ 25(OH)D3 ] had decreased and was lower in the M2 and S groups than in the C group . Increases in 25(OH)D2 for groups C , M1 , M2 , and S were 1.2 ± 5.2 , 13.8 ± 7.3 , 12.7 ± 3.7 , and 32.8 ± 3.3 nmol/L and decreases in 25(OH)D3 were -3.9 ± 16.3 , -10.4 ± 6.4 , -20.6 ± 14.6 , and -29.5 ± 15.9 nmol/L , respectively . Concentrations did not change in group C. In summary , ergocalciferol was absorbed and metabolized to 25(OH)D2 but did not affect vitamin D status , because 25(OH)D3 decreased proportionally
Conclusion Although , serum 25(OH)D concentrations after supplementation reached sufficiency was observed , muscle strength did not significantly improve at this point of current meta- analysis .
Background The purpose of this systematic review and meta- analysis is to investigate the effects of vitamin D3 supplementation on skeletal muscle strength in athletes .
Vitamin D3 supplements or vitamin D3 fortified foods always have cl aims for bringing people health benefits including bone and muscle health .
An up-to- date rigorous systematic review and meta- analysis is important to better underst and the effect of vitamin D3 supplementation on muscle strength .