How much vitamin D should one take daily?

Answer 1

The FDA[Federal drug administration USA]recommended daily allowance[RDA] of vitaminD is- (a) 200 IU(International unit) per day for children and adults<50 years old,(b) 400IU per day for adults> 50 years old (c)600-800 IUper day for the elderly> 70years old scientists and nutritionists believe that the doses in the RDA are not high enough. Good studies show that up to 10 times the recommended daily allowance is safe.According to the FDA ,2000IU is a safe dose for everyone ,except children under 1 year old.Studies ,however,have shown that adults taking doses up to 10,000 IU per day for five months didnot have any evidence of vitaminD overdose. Most experts agree that children and adults who stay out of sun require 800 to 100 IU daily. ultimately , the best dose for anyone needs to be determind with your doctor, but if your are healthy adult and not preegnant or brestfeeding woman ,you have three options : there are two types of vitamin D -(1) vitamin D2- Ergocalciferol, which comes from plants, (2) vitamin D3- Cholecalciferol, which comes from exposure to UV radiation and certain foods. Some studies have shown that D3 raises vitamin D levels in the bloodstream higher than D2 ,but D2 has been shown to be effective at preventing vitamin D deficiency at the right doses .The goods news is that everyone can use vitamin D2 and vitamin D3 to getball the benefits of healthy vitamin D levels in the bloodstream.