Vitamin World Natural Vitamin K-2 Bioactive Form

Our assessment

Our assessment: The evidence shows that vitamin K-2 plays a specific role in directing calcium to your bones and teeth, rather than allowing it to deposit in your arteries. However, for this product specifically, key data is missing. The exact dosage of vitamin K-2 (menaquinone) per serving is not provided, making it impossible to determine if this supplement meets a clinically effective level. Without this crucial number, we cannot confirm its potency or value for your health goals.

How it works

Think of vitamin K-2 as a traffic director for calcium in your body. It activates proteins that help bind calcium to your bone matrix, while simultaneously inhibiting calcium from building up in your blood vessels [NIH ODS]. This mechanism supports both bone density and cardiovascular health. Because the exact amount of K-2 in this product is not listed, you cannot know if you are receiving a dose that would meaningfully activate these proteins.

Safety profile

Data not available. The FDA adverse event report data provided does not include specific side effect counts or reports for Vitamin World Natural Vitamin K-2 Bioactive Form. Because the dosage is also missing, we cannot evaluate risk based on typical safety thresholds for vitamin K supplements. Vitamin K-2 generally has a low toxicity profile, but without specific data, we cannot offer a detailed safety analysis for this product.

Our recommendation

Our recommendation: Do not purchase this product until the manufacturer provides the exact microgram (mcg) amount of vitamin K-2 per serving. A standard, evidence-based dose for supporting bone health is typically 45 to 100 mcg daily [NIH ODS]. Look for a supplement that clearly lists the specific form (e.g., MK-4 or MK-7) and the precise dosage on the label so you can make an informed choice.

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