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As an alternative, WS supplementation may also alter the activity of critical enzymes in physiological processes linked to the creation of testosterone, increasing levels in people with low cortisol levels [11, 12, 160], but not in people with high cortisol levels [29]

This classification significantly restricts legal compounding of these peptides in the United States

The American journal of the medical sciences

Same name, unrelated chemistry, different aisle

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It May Help Strengthen Nails Journal of Cosmetic Dermatology in December 2017, found a 12 percent increase in nail growth and 42 percent fewer broken nails than before the participants started using collagen peptides