Lets first start with B12, in and of itself
Lung Cancer In 2017, a study found that men taking B12 supplements appeared to have an increase in lung cancer risk

Home Products Veterinary Injections Vitamin B2 - B6 And B12 Injection Vitamin B2 - B6 And B12 Injection Product Details: Medicine Type Veterinary Injectables Physical Form Liquid Ingredients Other Treatments & Functions Nervine tonic & anorexia Recommended For Cattle, Horse, Sheep, Goat, Dogs, Cats Storage Instructions Normal Click to view more Vitamin B2 - B6 And B12 Injection Price And Quantity 3000 Pack 2.7 USD ($)/Pack Vitamin B2 - B6 And B12 Injection Product Specifications Veterinary Injectables Normal Cattle, Horse, Sheep, Goat, Dogs, Cats Liquid Nervine tonic & anorexia Other Vitamin B2 - B6 And B12 Injection Trade Information Mumbai Letter of Credit at Sight (Sight L/C), Cash Advance (CA) 1 Pack Per Week 1 Week Yes Contact us for information regarding our sample policy Available in 30ml & 100ml Western Europe, Australia, North America, Eastern Europe, Middle East, South America, Asia, Central America, Africa All India GMP, WHO GMP, Free sales certified Product Description Vitamin B2 - B6 And B12 Injection Vitamin B2 - B6 And B12 Injection contains water-soluble vitamins that are required for glucose and fat metabolism as well as protein building

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The following chart maps the complete titration protocol from week 1 through maintenance, showing both the milligram dose and the corresponding syringe units for the two most practical reconstitution concentrations