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Description
Beyond therapeutic potential, this review also identifies safety liabilities

Active peptides should appear in the upper third of the ingredient list, not buried at the bottom after fragrances and preservatives

Black or tarry stool, visible blood in the stool, vomiting blood, severe abdominal pain, unexplained weight loss, persistent fever, anemia, or progressive swallowing difficulty should be evaluated appropriately

The abdomen (avoiding the umbilicus), thighs, and upper outer arms are standard sites

Patel NS, et al
