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When levels are low, you may feel tired or sluggish

This citation was included in letters for products such as hand sanitizer, hand soaps, and other topical drug products at high risk for diethylene glycol (DEG) or ethylene glycol (EG) contamination

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Gut symptoms may involve motility, inflammation, infection, immune reactions, microbiome changes, or medication effects

Beyond these, other peptides like Tesamorelin (a GHRH analog FDA-approved for HIV muscle wasting) or BPC-157 (a regenerative peptide for healing) can indirectly support muscle growth by optimizing hormones and speeding recovery from workouts