what is b12 injections good for The Truth About B12 Injections:

How do you use Cyanocobalamin (Vitamin B12) Injection

Preparing these solutions, of course, requires careful handling and the use of high-quality diluents like Bacteriostatic Reconstitution Water (bac) to ensure sterility and stability

PubMed PMID: 33645410

Allergic reactions to proprietary preparations of vitamin B12 might be due to substances added to the solutions as preservatives or for other reasons, to impurities from the production, or to the vitamin B12 itself

However, a well-formulated 2 %3 % topical serum applied consistently over 12+ weeks produces excellent facial results without the needle

Freeze/thaw cycles degrade peptides, so aliquot the reconstituted solution if you plan to run assays over several weeks