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Therapeutic peptides: Current applications and future directions
One study found that a 2% concentration of a glutathione cream improved the melanin index (a measure of melanin in skin) on dark spots when used twice a day for 10 weeks
The FDA only evaluates foods and drugs, not supplements like these products
They are not FDA-approved for weight loss
Q2: For stability questions, which is more stable in supplementation
Deficiency can mean there is absent or reduced enzyme activity, with variability in the degree of reduction in enzyme activity
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