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A systematic review of resveratrol clinical trials to highlight gaps and opportunities

It can become itchy, swollen, sore, or slightly painful, but usually just goes away on its own

Most are animal sources (milk, egg yolks, yogurt, salmon, tuna, beef) which is why vegetarians and vegans have a higher risk of being deficient (3)

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Topical copper peptide serums usually don't but benefit from it

For severe deficiency, clinicians typically prescribe loading doses daily or every other day for one to two weeks followed by monthly maintenance injections