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[29] For example, a 2012 study published in Nutrients found that people with B12 deficiency can have elevated levels of inflammatory markers like TNF- and resistin

While the direct link between collagen peptides and accelerated hair growth requires more robust scientific validation, numerous anecdotal accounts and smaller studies suggest collagen supplementation may help reduce hair brittleness, improving strength and appearance

Zhang S, Hu W, Yuan L, Yang Q

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In sunny regions like San Diego, where UV exposure can increase oxidative stress, glutathione helps to neutralize free radicals, reducing cellular damage and inflammation