Life Extension B12 500 mcg
Brand: Life Extension · Form: LOZENGE [E0174]
Our assessment
The evidence shows that Life Extension B12 500 mcg is a straightforward supplement. However, based on the data provided, the active ingredient is not vitamin B12 but calcium. Our assessment is that this product is intended to support bone health and nerve function through calcium, not B12. Data on vitamin B12 content is not available from the provided sources.
How it works
Think of calcium as a structural and signaling mineral. It supports bone mineralization and density, helping your skeleton stay strong. It also aids in neuromuscular relaxation and nerve signaling, which is essential for muscle function and communication between your brain and body [NIH ODS].
Safety profile
FDA has received a total of 592,059 adverse event reports across all supplements. For calcium specifically, high intakes may increase the risk of heart disease and prostate cancer. High levels in the blood and urine can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [FDA data] [NIH ODS].
Our recommendation
We recommend you verify the label before use, as the data provided identifies calcium, not B12, as the main ingredient. If your goal is B12 supplementation, this product may not meet that need. If you are taking calcium, be aware it can reduce absorption of bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Always check with your pharmacist about timing your doses.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Life Extension |
|---|---|
| Serving Size | |
| Contents | 100.0 Lozenge(s) |
| Market Status | Off Market |
How to Read This Label
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