Personal use for research purposes occupies a different regulatory space than commercial distribution for therapeutic claims
According to the National Academies of Sciences, Engineering, and Medicine (NAP), a safe highest level is called the tolerable upper intake level. Assessment of what amount is too much is based on animal and human studies, published evidence of adverse events, and professional agreement based on a committee of experts
If you still have questions about the type of B12 to use, the dosage necessary, when/how you should use it, etc
You can expect: First consultation: full history, physical assessment, discussion of your goals and the procedures that might suit you
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Biotin Injection Biotin (Vitamin B7) is a water-soluble B vitamin that acts as an essential cofactor for carboxylase enzymes involved in fatty acid synthesis, gluconeogenesis, and amino acid metabolism