“What astonished me was the very low toxicity of a substance that has such very great physiological power.”

— Linus Pauling

Statement about vitamin B3, (either niacin or niacinamide), in How to Live Longer and Feel Better (1986), Avon Books, , p. 24.
1990s
Context: What astonished me was the very low toxicity of a substance that has such very great physiological power. A little pinch, 5 mg, every day, is enough to keep a person from dying of pellagra, but it is so lacking in toxicity that ten thousand times as much can be taken without harm.

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Linus Pauling 19

American scientist 1901–1994

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