Cost per day: $0.03-0.04 Annual cost: $10-15 Best value if: Budget is tight and you have no genetic issues Methylcobalamin: $15-25 per 120 capsules (1,000mcg) Cost per day: $0.13-0.20 Annual cost: $50-75 Best value if: You want optimal absorption and neurological support Hydroxocobalamin (injection): $15-30 per vial (1,000mcg) Monthly cost: $15-30 (one injection/month maintenance) Annual cost: $180-360 Best value if: You have malabsorption or pernicious anemia (no point paying for oral that wont absorb) Adenosylcobalamin: $25-40 per 60 capsules (1,000mcg) Cost per day: $0.40-0.65 Annual cost: $150-240 Best value if: You need mitochondrial/energy support beyond what methylcobalamin provides Combination formulas: $20-40 per 60 capsules (500mcg each of 2-3 forms) Cost per day: $0.35-0.65 Annual cost: $130-240 Best value if: You want comprehensive coverage and dont mind the premium The value calculation: Cyanocobalamin to Methylcobalamin = 5x price increase for better absorption/activity Methylcobalamin to Injections = 3-4x price increase for 100% absorption Is it worth it

There might be some discomfort from the injection, not much different from getting a vaccination, says Miller
Liver disease represents one of the most frequent causes of elevated B12
If you have had neurological symptoms that affect your nervous system, such as numbness or tingling in your hands and feet, caused by a vitamin B12 deficiency, youll be referred to a haematologist and may need to have injections every 2 months
While they can complement a routine and help support healthier-looking hair, theyre not a replacement for clinically-proven hair loss treatments