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Vitamin D3 (cholecalciferol)
Berlin, winter of 1919. A pediatrician wheels a mercury-vapor lamp beside a child with bowed legs; weeks later, the bones harden and straighten....
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Vitamin C (ascorbic acid)
Picture a sailor in 1747, gums bleeding, legs spotted, morale sinking. Six days after eating two oranges and a lemon, he's back on duty. Two centuries later, a...
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Elderberry (Sambucus nigra)
You're standing at a country hedge in late summer, fingers stained purple. For centuries, those glossy clusters were the village "medicine chest." In labs...
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Zinc
Zinc refused to give up its secrets. For centuries, metalworkers could smelt copper, tin, iron, and lead with a hot fire. Zinc wouldn't cooperate—it slipped...
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