AOR Advanced Orthomolecular Research Advanced Methyl B12 - 15mg

Our assessment

The evidence shows that this product contains a very high dose of vitamin B12 (15 mg per serving). For most people, this is far beyond the body’s daily needs. While B12 is generally considered safe, such high doses are typically only used under medical supervision for specific conditions like pernicious anemia or absorption disorders. For general wellness, lower doses are usually sufficient [NIH ODS].

How it works

Think of vitamin B12 as a critical building block for your nerves and blood cells. It supports the formation of the myelin sheath that protects your nerves and helps your body produce red blood cells and DNA [NIH ODS]. At the 15 mg level, the goal is to ensure that even if your gut has trouble absorbing B12, enough gets into your bloodstream to support these essential functions.

Safety profile

FDA received 592,059 total adverse event reports across all supplements, though specific data for this exact product is not available. For B12 itself, side effects are rare at high doses, but can include mild diarrhea, itching, or a feeling of swelling. Data on long-term safety at the 15 mg level from the provided sources is limited. Interactions with other medications are not listed in the data provided for this specific ingredient [FDA data].

Our recommendation

Our assessment: This product is best suited for individuals with a confirmed B12 deficiency or those with absorption issues, such as older adults or people with digestive conditions. If you are a healthy adult, you likely do not need 15 mg daily. Start by checking your B12 blood levels with your doctor. If you choose this product, take it exactly as directed and watch for any unusual symptoms. For general wellness, a standard 1,000 mcg (1 mg) dose is often adequate [NIH ODS].

Supplement labels contain several key sections regulated by the FDA:

• Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
• Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
• % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
• Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
• Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.

Source: FDA Dietary Supplement Labeling Guide