So, No Side Effects to B12 Injections
Besides, in vitro cytotoxicity with HaCaT keratinocytes and human in vivo data was well- correlated 22,32,33
Scalp irritation from microneedling or topicals Irritation from the microneedling component usually responds to reducing frequency or needle depth
Low B12 can cause tiredness, nerve problems, depression, and increased heart disease risk from high homocysteine
If you must freeze (to preserve excess), accept that some potency loss will occur and that portion should be used more quickly once thawed
For a deeper look at formulation and absorption, the article How to Use Glutathione for Maximum Wellness Support expands on why delivery systems matter so much