Nutrient adequacy and supplementation

摘要: The lower limits for nutrient intakes are based on the observed consumption level of healthy populations, if data from functional investigations is lacking. This intake called adequate (AI) and assumed to cover needs people. Because current limitations scientific evidence, Food Nutrition Board established AIs applicable adults nutrients such as total fat, omega-6 fatty acids, omega-3 vitamin D, K, pantothenic acid, biotin, choline, calcium, chromium, fluoride, manganese. As information about requirements infants (under one year old) even more limited, only Als were set most nutrients. exceptions definite protein, iron, zinc 7–12-month-old infants. There little doubt that too much any can do harm. For some amounts might cause concerns so high they not likely be used. dietary reference DRI framework formally explores potential harm with relates them tolerable upper (UL). practice using concentrated sources specific prevention disease has a long history. discovery by James Lind in 1753 scurvy could prevented judicious use citrus fruits enabled British Navy greatly extend duration their missions build up domination seas. early ridicule notwithstanding, supplements exploded since now sustains major industry.