Mediators Inflamm
The puncture would cause chest pain and make it difficult to breathe
Others take longer, and if B12 wasnt the cause, you may notice little change

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)

You should always consult with a health care practitioner before relying on any information in this article or on this website
The day of surgery: Oral and sublingual B12 are paused on the morning of surgery as part of standard fasting, since you are not eating