Pauling L
Proc Natl Acad Sci U S A. 1970 Dec;67(4):1643-8. doi: 10.1073/pnas.67.4.1643.
Ascorbic acid differs from other vitamins in that an exogenous source is required by only a few animal species. It is pointed out that this fact indicates that the amount contained in a diet of raw natural plant food is less than the optimum intake, corresponding to the best health. This argument leads to the conclusion that the optimum daily intake is about 2.3 g or more, for an adult with energy requirement 2500 kcal day(-1).
抗坏血酸与其他维生素的不同之处在于，只有少数动物物种需要外源抗坏血酸。有人指出，这一事实表明，天然植物性生食中的抗坏血酸含量低于对应最佳健康状态的最佳摄入量。由此得出的结论是，对于能量需求为2500千卡/天的成年人来说，最佳每日摄入量约为2.3克或更多。
