If you’re someone who regularly stays on top of their health and fitness, then you know how important vitamin D3 and K2 are. The two vitamins work symbiotically to improve bone health, vascular integrity and immune support.

Don’t just take my word for it, experts agree on the benefits of taking the two vitamins together. According to a study done in 2025, researchers conducted a double-blind trial of 142 postmenopausal women with osteopenia, a bone condition that causes lower bone density. At random, one group took either vitamin K2 or a placebo for 3 years. Both groups also took vitamin D3 and calcium.

The study found that the group who received vitamin D3 and calcium supplemented with vitamin K2 had increased levels of activated osteocalcin, a bone-building protein, compared to the placebo group which received only vitamin D3 and calcium.

Transparent Labs is a supplement company that takes it name seriously. All products go through third-party testing, ensuring high quality control and effectiveness of each supplement.

Delivered in softgel veggie tablets, get 60 servings of these D3 and K2 vitamins. Along with improving your bone health, taking these are a good way to improve your overall wellness helping your body get to peak condition. Made with clean and vegan ingredients, all dosages are clinically-validated for the best results.

Reviewers say that they’ve noticed a difference with these tablets, reporting that they’re “easy to swallow” and have experience no stomach issues if taken without food or drink.

“I’m a senior woman living in the subarctic and both of those things conspired to give me low Vitamin D levels. But even with the prescribed 5000 units I was not achieving optimal levels. Turns out K2 is the key! Now my levels are just where they need to be,” one reviewer shared.

Another review stated “I’ve been taking supplements since I first got into fitness in my early 20s. I’m in my late 40s now. During my fitness journey I have tried a lot of supplement brands but none have delivered like Transparent Labs. This brand is top notch. Their supplements are high quality.”

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