1998;139(5):552-561 Giustina A, Veldhuis JD
The difference in chemical structure between this peptide and the original IGF-1 is the substitution of arginine at the third position, which significantly modifies the compound
This combination has shown potential in reducing visceral fat, improving body composition, and supporting overall metabolic health 10
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It's a relatively high amount for a supplement to have, but it shouldn't be a problem for most people since the maximum per-day allowance for adults is 400mcg.34 That said, you may want to avoid Doctor's Best Glutathione + Milk Thistle if you take another supplement that includes selenium or eat a lot of selenium-rich foods (e.g., Brazil nuts, tuna)
The Journal of Clinical Endocrinology and Metabolism, 91 (3), 799-805