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Sentinel Vitamin B-12 is a dietary supplement containing 500 micrograms of vitamin B-12 per tablet, with 100 tablets per bottle. This essential nutrient supports red blood cell formation, DNA synthesis, and proper nervous system function while helping maintain healthy energy levels. This supplement comes in a dark amber bottle to protect the vitamin from light degradation and maintain potency. The 500 mcg dosage is commonly recommended for those with B-12 deficiency, vegetarians/vegans, older adults, or individuals with absorption issues. The sealed safety cap ensures product freshness and integrity. As with any supplement, consult with a healthcare provider before use.