Nature’s Bounty Vitamin D3 K2 Supplement

Our verdict

Nature’s Bounty Vitamin D3 K2 Supplement works out to $0.26 per serving of vitamin d3, at 4000IU per serving in capsule form. That puts it above the median of the 290 vitamin d3 products we can price per dose, where the typical serving costs $0.11, a Value Index of 0.4 where the median product is 1.0. One container lasts 30 days at the label dose of 1 serving a day, about $7.94 a month. We could not verify a third-party certification for Nature's Bounty in a public registry. Worked out from the current retail price as of 2026-11-13; confirm the live price on Amazon.com before buying.