Here are the dosages you can expect from different B12 options
10.1186/s12915-014-0056-6 BMC Biol
Ning Y, Xiao Z, Weinmann M, Li Z (2019) Phosphate uptake is correlated with the root length of celery plants following the association between arbuscular mycorrhizal fungi, Pseudomonas sp
You also risk using a solvent with an altered pH, which can damage sensitive peptides and invalidate your research data
(RUO).
A few signs, however, mean something needs attention, and the faster you act, the better the outcome: At the IV site: spreading redness, warmth, major swelling, hardness, or pus Whole-body red flags: high fever, chills, shortness of breath, chest pain, confusion, or very low urine output These reactions are rare but non-negotiable