Key Takeaways

Many injectable peptides are unregulated and have not been reviewed for safety by the FDA.

Users have reported side effects such as injection site reactions, fatigue, headaches, and gastrointestinal issues.

Experts say dosing, safety, and long-term risks remain unclear, especially when products come from unregulated compounding pharmacies.

Injectable peptides have surged in popularity as a wellness trend promoted by celebrities and fitness influencers. Peptides are short chains of amino acids that form the building blocks of proteins, and they're marketed as being able to speed injury recovery, build muscle, slow signs of aging, and even support weight loss.

However, many injectable peptides are not approved by the Food and Drug Administration (FDA), and they could be ri

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