fda warning peptides bpc-157 not approved for human use An advisory committee is looking at lifting a ban and widening access to seven popular peptides., Some are by the FDA and widely used, like insulin and GLP-1s. Three years ago, What to Know About Peptides

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Keep all medicines away from children and pets

Before taking, speak with your doctor if you are allergic to vitamin b12, have a genetic condition called optic atrophy, have blood in your urine, polycythemia, an ongoing infection, low iron or folate levels, are pregnant or plan to become pregnant, are breastfeeding or plan to breastfeed

Here is a more specific review of those issues

the other son dabbles (pretty successfully) in the drug trade

Vitamin B12 shots may not be suitable for people with a history of: sensitivity to vitamin B12 Lebers disease, which affects the optic nerve kidney problems hypokalemia (low potassium levels) deficiencies in other nutrients, particularly folic acid and iron Vitamin B12 injections typically begin to work straight away