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Sources Ref Links: Vitamin B12- National Institutes of Health Breakfast cereal fortified with folic acid- Pub Med LARGE FLAKE NUTRITIONAL YEAST- USDA Soy milk- USDA Milk, whole, 3.25% milkfat, with added vitamin D- USDA Lamb, variety meats and by-products, liver, cooked, pan-fried- USDA Mollusks, clam, mixed species, cooked, moist heat- USDA Fish, trout, mixed species, cooked, dry heat- USDA Fish, sardine, Atlantic, canned in oil, drained solids with bone- USDA Fish, salmon, Atlantic, farmed, cooked, dry heat- USDA Egg, whole, cooked, hard-boiled- USDA Vitamin B12-Containing Plant Food Sources for Vegetarians- NLM Vitamin B12- National Institutes of Health Effect of Folic Acid, Betaine, Vitamin B6, and Vitamin B12- NLM If high folic acid aggravates vitamin B12 deficiency- NLM

Tiaminal B12 Injection and International Variations Outside the US, theres Tiaminal B12 injection

3 Panthenol, Niacinamide, Sodium Hyaluronate and Allantoin power scalp comfort and hydration

Graham, Otto M

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The difference here is that B12 analogues are not bioavailable and so wont improve your B12 intake