The Mayo Clinic indicates high doses of vitamin B-12, such as those used to treat a deficiency, might cause: Headache Nausea and vomiting Diarrhea Fatigue or weakness Tingling sensation in hands and feet Healthline says: In very rare cases, some people can experience side effects caused by allergic reactions or sensitivity In addition to helping athletes build muscle, vitamin B12 plays a role in maintaining nervous system function and brain health
BPC-157 has been shown in research to promote angiogenesis (the growth of new blood vessels), protect organs, prevent gastric ulcers, and heal skin, muscle, bone, and tendon
They are slightly more expensive than "budget" vendors who don't provide COAs, but they are significantly more affordable than the legacy "medical-grade" research boutiques that charge a massive premium for their brand name
For those exploring peptide treatments for metabolic health, you might also want to read about Retatrutide benefits and how they compare to other options on the market