Vitamin C维生素 C

Fresh food

Stop 1/6

新鲜食物

Ascorbic acid is destroyed by three things: heat, oxygen, water.

Cut fruit left in air for 24 hours loses 30–50%Vegetables (especially leafy greens) boiled 10 minutes lose ~50%Shredded and soaked in water — you're literally washing the water-soluble C away
Highest food sources (mg / 100g):

Bell peppers 130–190 mgKiwi 90 mgBroccoli, Chinese kale 80–90 mg (raw)Strawberries 60 mgCitrus 50 mg
Humans, primates, and guinea pigs are among the few mammals unable to synthesize vitamin C. Other mammals have L-gulono-lactone oxidase in liver and kidney, which makes C directly from glucose; in humans this gene (GULO) has degraded into a pseudogene, so vitamin C must come from food daily. This is why ancient sailors began dying of scurvy around week 8 of food rationing — once the body pool burned out, there was no buffer left.

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本站提供科普与一般性建议，不替代医师诊断或处方；有症状或正在服药请咨询合格医师。 Educational content, not medical advice — consult a clinician for diagnosis or treatment.

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Vitamin C维生素 C

Fresh food

Stop 1/6

新鲜食物

Ascorbic acid is destroyed by three things: heat, oxygen, water.

Cut fruit left in air for 24 hours loses 30–50%Vegetables (especially leafy greens) boiled 10 minutes lose ~50%Shredded and soaked in water — you're literally washing the water-soluble C away
Highest food sources (mg / 100g):

Bell peppers 130–190 mgKiwi 90 mgBroccoli, Chinese kale 80–90 mg (raw)Strawberries 60 mgCitrus 50 mg
Humans, primates, and guinea pigs are among the few mammals unable to synthesize vitamin C. Other mammals have L-gulono-lactone oxidase in liver and kidney, which makes C directly from glucose; in humans this gene (GULO) has degraded into a pseudogene, so vitamin C must come from food daily. This is why ancient sailors began dying of scurvy around week 8 of food rationing — once the body pool burned out, there was no buffer left.

Read story

本站提供科普与一般性建议，不替代医师诊断或处方；有症状或正在服药请咨询合格医师。 Educational content, not medical advice — consult a clinician for diagnosis or treatment.