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Many people expect it to whiten skin quickly
The concern isn't usually the collagen itself, but the biotin (Vitamin B7) that is often added to collagen supplements
The ingredients they use are carefully researched and sourced in order to make sure that they are high quality
Dosing is typically the same
This means most people get the recommended amounts of these vitamins through diet alone
common reactions include transient pain, erythema, or pruritus at the administration site, along with mild diarrhea, headache, or nausea in a minority of recipients
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