Key Takeaways Injectable GHK-Cu is not FDA-approved: do not treat research-use GHK-Cu like a prescribed medication
sticking to the schedule helps maintain optimal nutrient levels in your body
Some peptides are FDA-approved for specific indications (e.g., Emdogain for periodontal regeneration)
Contact your provider if you experience intractable vomiting (unable to keep down fluids for more than 24 hours), severe abdominal pain (particularly if constant or radiating to the back), or signs of dehydration including decreased urination, extreme thirst, dizziness, or confusion
Since the best sources are foods that are derived from animals, those who are vegan or on a plant-based diet may not consume enough vitamin B12
Their non-medical use carries health and legal risks