| Vitamin B12 Drops | A.N. Tyler Holdings Ltd. | 1,000 mcg | Canada | 液体 |
| Vitamin B12 500 mcg | AN Amazing Nutrition Amazing Formulas | 500 mcg | United States | 片剂 |
| Vit B12 1,000 mcg | Biomed Pharma | 1,000 mcg | Canada | 片剂 |
| Vitamin B12 5000 mcg Raspberry Flavor | Bluebonnet EarthSweet Chewables | 5,000 mcg | United States | 片剂 |
| Vitamin B12 100 mcg | Bountiful Canada Vitamins ULC | 100 mcg | Canada | 片剂 |
| Vitamin B12 1% (Cyanocobalamin) 1000 mcg | BulkSupplements.com | 1,000 mcg | United States | 胶囊 |
| Vitamin B12 1000 mcg Softgels | BulkSupplements.com | 1,000 mcg | United States | 胶囊 |
| Vitamin B12 Softgels 1000 mcg | BulkSupplements.com | 1,000 mcg | United States | 胶囊 |
| Vitamin B12 Softgels 5000 mcg | BulkSupplements.com | 5,000 mcg | United States | 胶囊 |
| Vitamin B12 1000 mcg Timed Release | CellChem Pharmaceuticals Inc. | 1,000 mcg | Canada | 片剂 |
| Vitamin B 12, 1000 mcg | Cherish Nutrition Canada | 1,000 mcg | Canada | 片剂 |
| Vitamin B12 1000 mcg | Country Life | 1,000 mcg | United States | 片剂 |
| Vitamin B12 500 mcg | Country Life | 500 mcg | United States | 片剂 |
| Vitamin B12 | Douglas Laboratories | 2,500 mcg | United States | 片剂 |
| Vitamin B12 1000mcg Tablets | Exzell Pharma Inc. | 1,000 mcg | Canada | 片剂 |
| Vitamin B12 500mcg Tablets | Exzell Pharma Inc. | 500 mcg | Canada | 片剂 |
| Vitamin Code Raw B-12 NP | Garden of Life Canada | 1,000 mcg | Canada | 胶囊 |
| Vitamin B12 Raspberry Flavor | Gummiology | 3,000 mcg | United States | 软糖 |
| Pure-le Natural Vitamin B12 | Health4All Products Ltd. | 500 mcg | Canada | 粉剂 |
| Vitamin B12 | Holista Health (Canada) Inc. | 250 mcg | Canada | 片剂 |
| Vitamin B12 | Holy Land Traditional Medications Inc. | 1,000 mcg | Canada | 胶囊 |
| Vitamin B 12 25 mcg | Jamieson Laboratories Ltd./ Nutricorp International | 25 mcg | Canada | 片剂 |
| IronKids Gummies Vitamin B12 250 mcg | Life Science Nutritionals Inc. | 250 mcg | Canada | 软糖 |
| IronKids Gummies Vitamin B12 500 mcg | Life Science Nutritionals Inc. | 500 mcg | Canada | 软糖 |
| Shot-O-B12 (Liquid) | Natural Organics Inc. | 1,000 mcg | Canada | 液体 |
| Energy B12 Adult Gummies 1000 mcg | Nature Made | 1,000 mcg | United States | 软糖 |
| Vitamin B12 1000 mcg | Nature Made | 1,000 mcg | United States | 胶囊 |
| Vitamin B12 1000 mcg | Nature Made | 1,000 mcg | United States | 胶囊 |
| Vitamin B12 1000 mcg | Nature Made | 1,000 mcg | United States | 胶囊 |
| Vitamin B12 1000 mcg Cherry Flavor | Nature Made | 1,000 mcg | United States | 含片 |
| Vitamin B12 3000 mcg | Nature Made | 3,000 mcg | United States | 胶囊 |
| Vitamin B12 3000 mcg Cherry Flavor | Nature Made | 3,000 mcg | United States | 含片 |
| Vitamin B12 3000 mcg Cherry Flavor | Nature Made | 3,000 mcg | United States | 含片 |
| Vitamin B12 3000 mcg Cherry Flavor | Nature Made | 3,000 mcg | United States | 含片 |
| NATURE'S BOUNTY VITAMIN B-12 500mcg tablets | Nature's Bounty | 50,000 mcg | Malaysia | 片剂 |
| Vitamin B12 1000 mcg | Nature's Plus | 1,000 mcg | United States | 片剂 |
| B-12 1,000 mcg | Nature's Truth | 1,000 mcg | United States | 片剂 |
| B-12 1,000 mg | Nature's Truth | 1,000 mcg | United States | 片剂 |
| B-12 500 mcg | Nature's Truth | 2,500 mcg | United States | 片剂 |
| Timed Release B-12 1,000 mcg | Nature's Truth | 1,000 mcg | United States | 片剂 |
| Trophic - B12 Sublingual | Nestle Canada Inc. dba (Atrium Innovations/Genestra Brands/Pure Encapsulations/Garden of Life Canada/Trophic Canada/SISU/Wobenzym/Bountiful Canada Vitamins/Nature's Bounty/Vital Proteins Canada) | 500 mcg | Canada | 片剂 |
| Vitamin B12 | Nestle Canada Inc. dba (Atrium Innovations/Genestra Brands/Pure Encapsulations/Garden of Life Canada/Trophic Canada/SISU/Wobenzym/Bountiful Canada Vitamins/Nature's Bounty/Vital Proteins Canada) | 1,000 mcg | Canada | 胶囊 |
| Vitamin B12 | Nutricorp International | 250 mcg | Canada | 片剂 |
| Vitamin B12 | Nutricorp International | 1,200 mcg | Canada | 片剂 |
| Vitamin B12 100 mcg | Nutricorp International | 100 mcg | Canada | 片剂 |
| Brain Power Gummies Raspberry Flavor | Phytoral | 4,500 mcg | United States | 软糖 |
| Vegan Vitamin B-12 500 mcg | PlantFusion | 500 mcg | United States | 片剂 |
| Prime Health Vitamin B-12 500 mcg | Prime Health Ltd. (Canada Global Life Sciences) | 500 mcg | Canada | 片剂 |
| Vitamin B12 100 Mcg | Rhema Health Products Limited | 100 mcg | Canada | 片剂 |
| Adrien Gagnon Vitamine B12 1000 mcg/Vitamin B12 1,000 mcg | Santé Naturelle (A.G.) Ltée | 1,000 mcg | Canada | 片剂 |
| Megasorb Vitamin B12 2500 mcg | Solgar | 5,000 mcg | United States | 其他剂型 |
| Vitamin B12 2500 mcg | Solgar | 5,000 mcg | United States | 其他剂型 |
| B12 5000 mcg | Sundown Naturalist | 5,100 mcg | United States | 含片 |
| Vitamin B12 1000 mcg | The Vitamin Shoppe | 1,000 mcg | United States | 含片 |
| Vitamin B12 1000 mcg | The Vitamin Shoppe | 1,000 mcg | United States | 含片 |
| Vitamin B12 3000 mcg | The Vitamin Shoppe | 3,000 mcg | United States | 含片 |
| Vitamin B12 500 mcg | The Vitamin Shoppe | 500 mcg | United States | 胶囊 |
| Vitamin B12 500 mcg | The Vitamin Shoppe | 500 mcg | United States | 胶囊 |
| Vitamin B12 Gummies 1000 mcg Raspberry | The Vitamin Shoppe | 1,000 mcg | United States | 软糖 |
| Dr. Tahir's Vitamin B12 1000 mcg capsules | Toronto College of Naturopathic Medicine Inc. | 1,000 mcg | Canada | 胶囊 |