参考
- ↑ https://health.clevelandclinic.org/why-hair-turns-gray/
- ↑ https://www.health.harvard.edu/blog/hair-turn-gray-2017091812226
- ↑ https://ods.od.nih.gov/factsheets/VitaminB12-Consumer/
- ↑ https://pubmed.ncbi.nlm.nih.gov/21979243/
- ↑ https://lpi.oregonstate.edu/mic/minerals/copper
- ↑ https://pubmed.ncbi.nlm.nih.gov/21979243/
- ↑ https://www.hsph.harvard.edu/nutritionsource/zinc/
- ↑ https://www.nhs.uk/conditions/vitamins-and-minerals/iron/
- ↑ https://pubmed.ncbi.nlm.nih.gov/19322028/
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