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Contaminated peptides can cause injection site infections, systemic immune reactions, fever, and other adverse effects

Some peptides are FDA approved for specific medical uses, but many of the peptides discussed for general inflammation, healing, and brain health remain investigational or are limited to compounding under shifting rules

One patented Chinese drug with two ingredients, Chenopodium ambrosioides L

Only medical professionals, doctors, dermatologists, plastic surgeons, and licensed aestheticians can place an order

Even if fragments survive digestion, they are typically too large and too hydrophilic to cross the blood-brain barrier from systemic circulation