vitamin b12 injection serum available in us Methylcobalamin (Vitamin B12) It is administered by injection and is suitable for use in cats Serum Collagen Vitamin B12 Bottle

So you're really not getting accurate readings there

High-Quality Methylcobalamin B12 Injections at Supplements4YouAll At Supplements4YouAll, we provide high-quality methylcobalamin B12 injections designed for reliable and effective supplementation

This guideline was developed by the Guidelines and Protocols Advisory Committee in collaboration with the Provincial Laboratory Medicine Services, and adopted under the Medical Services Act and the Laboratory Services Act

B12 primarily supports energy metabolism and nerve health

With no further research available at the moment, there is insufficient evidence to recommend B12 for sleep rhythm disorders