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Product Details Available sizes: 5 mg and 50 mg Form: Lyophilized powder Testing: Independent third-party testing COA: Available by lot Origin: Manufactured in the USA Packaging: Sealed vial Storage: Refrigerate between 2C and 8C
Summary: Excessive vitamin B12 intake rarely causes toxicity, but very high levels from supplements or injections may be associated with skin reactions such as acne-like eruptions, though serious adverse effects remain exceptionally uncommon
Nicotinamide (niacinamide) does not cause flushing and has fewer side effects, with nausea and liver toxicity reported only at very high intakes ~3 g/day)
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