Health Thru Nutrition Naturally Vitamin B12 1000 mcg

Our assessment

The evidence for this specific product is limited. Our assessment: Based on the data provided, this supplement contains calcium, not vitamin B12 as the label suggests. The primary role of calcium is bone mineralization and neuromuscular relaxation [NIH ODS]. For a general audience seeking a vitamin B12 supplement, this product does not match the intended ingredient.

How it works

Think of calcium as a structural builder for your skeleton. It supports bone density and mineral deposition, and it also helps your muscles relax and your nerves signal properly [NIH ODS]. However, this mechanism does not address vitamin B12 functions, such as red blood cell formation or neurological health. The product name and the ingredient data are mismatched.

Safety profile

Data not available for this specific product. The FDA has received a total of 592059 adverse event reports across all supplements, but no specific report count is available for this product [FDA data]. For calcium in general, high intakes might increase the risk of heart disease and prostate cancer. High blood and urine calcium levels 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 [NIH ODS]. Calcium can also reduce absorption of medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

We cannot recommend this product as a vitamin B12 supplement because the data shows it contains calcium. If you need vitamin B12, look for a product that specifically lists methylcobalamin or cyanocobalamin as the ingredient. If you need calcium, consult your healthcare provider about appropriate dosing and potential medication interactions [NIH ODS]. Always verify the ingredient list matches the product 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