For severe deficiencies, especially those with neurological symptoms, a full resolution of symptoms might take several weeks or even months of consistent treatment
If your Vitamin B12 levels are low, we recommend 8-10 Vitamin B12 injections over the first two to three months and then one per month for maintenance after that
Because it acts on a different pathway than GLP-1 drugs, the National Institute of Diabetes and Digestive and Kidney Diseases describes how prescription medications treat overweight and obesity by changing appetite signaling rather than relying on willpower

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)

Combination protocols pairing metabolic peptides with other interventions show promise
The peptide protocol described above is prescribed by me, sourced through a US cGMP-certified compounding pharmacy, dosed for the patient and the procedure, and integrated into a recovery plan I have built operating on local, national, and international patients for the last fifteen years