We dont know if its use has adverse side effects: research not done
HEALTH CANADA WARNING Unauthorized health products have not been approved by Health Canada, which means that they have not been assessed for safety, efficacy and quality and may pose a range of serious health risks
Here is a full list of B vitamins: thiamin (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), folate/folacin or folic acid (B9) and cobalamins (B12)
Park J R, Lee H, Kim S I, et al
Vitamin B 12 deficiency can lead to anemia, neurologic, and digestive dysfunctions