First, acid in your stomach separates B12 from the protein its attached to
42 Another RCT studied cyano-B12, 1500 g three times per day for 2 weeks (route not reported), in patients with seasonal affective disorder and found no improvements in either the B12 or the placebo group
Before you can use a compound, you have to truly understand it

Ingredients Maltodextrin, Bulking Agent: Microcrystalline Cellulose, Vitamin C (Ascorbic Acid [Hydroxypropylmethylcellulose & Tartaric Acid]), Magnesium Oxide, L-Carnitine Tartrate, Inositol (Carrier: Acacia Gum) Vitamin E (D-Alpha Tocopheryl Acid Succinate) (from Soya ), Maca Extract, Zinc Sulphate, Tablet Coating: (Hydroxypropylmethylcellulose, Glycerin, Colours [Iron Oxides]), Crosslinked Cellulose Gum, Pine Bark Extract, Anti-Caking Agents: Stearic Acid, Magnesium Stearate & Silicon Dioxide, Thiamin (Vitamin B1 as Mononitrate [Carrier: Hydroxypropylmethylcellulose]), Niacin (as Nicotinamide), Ferrous Fumarate, Citrus Bioflavonoids, Pantothenic Acid (as Calcium Salt), Vitamin B6 (Pyridoxine HCl), L-Arginine, Vitamin A (as Acetate [Carriers: Acacia, Starch, Maltodextrin, Antioxidants: DL-Alpha Tocopherol]), Vitamin D3 (Cholecalciferol [Carriers: Acacia, Sucrose, Corn Starch, Medium Chain Triglycerides, Antioxidant: DL-Alpha Tocopherol]), Siberian Ginseng Extract, Riboflavin, Octacosanol (Rice Bran), Copper Sulphate, L-Glutathione, Coenzyme Q10 (CoQ10), Manganese Sulphate, Lycopene Extract, Folic Acid (as Pteroylmonoglutamic Acid), Sodium Selenate, Chromium Trichloride, Biotin, Vitamin B12 (Cyanocobalamin)

[v] Schnepp R