Dr. Berg Maximum Strength 7-in-1 Vitamin D3 K2 5000 IU | Naturally Derived D3 | 4X Lab-Tested & Verified | High Absorption Formula | K2 D3 Vitamin Supplement | 60 Capsules

I’ve been taking the Dr. Berg Maximum Strength 2-in-1 Vitamin D3 K2 supplement, and overall I think it’s a solid product—especially if you’re specifically targeting vitamin D support along with bone and cardiovascular health. It provides a high dose of Vitamin D3 (10,000 IU) combined with Vitamin K2, which is important because K2 helps direct calcium to the bones rather than allowing it to build up in arteries. That combination is the main reason I chose this type of supplement instead of taking D3 alone. I do think it’s important to be careful with a high-dose product like this. Before starting, I had my vitamin D levels checked through blood work, and I would strongly recommend anyone else do the same. Vitamin D is one of those nutrients where more is not always better, and long-term overuse can lead to excessive levels if you’re not monitoring intake. In my case, I’m using it as part of a broader health routine focused on bone support and overall vitamin optimization, and it seems to fit well. Overall, this is a strong, high-potency supplement with a good D3 + K2 combination, but it should be used responsibly with attention to blood levels to avoid over-supplementation.

Amazing med, I have a low D problem so it’s a must have for me. I didn’t realize how important the K part works until I listened to Dr Berg on Facebook. I do notice a little less joint pain. Over Christmas I had a friend visiting, he’s a big guy post stomach staple surgery. He was acting like a jerk, very irritable and anxious. I’m a nurse so I started him on these pills and gave him a bottle to take home. When he followed up with his doctor he indeed have a very low vitamin D issue. His doctor gave him a script until his levels are better but want him to continue on these after. He is up to normal.

My doctor recommended this specific brand for my Vitamin D efficiency. She said it’s a quality product and well-tested. A couple of months after starting it my blood was retested and my vitamin D levels are now perfect!

Dr. berg knows his stuff. Great product. No side affects. All his products are good. I've have bought countless bottles.

I have been using this product for over a year now. It is by the best quality product on the market in term of vitamin D3 K2. I will continue to use this product as I found great relive from a should pain that used to make my life miserable.

Its a good product. But be careful. Chk your blood vit D level. Mine ckd a week ago was 140. Way too high bordering on dangerous. I have one kidney and low hematocrit. That can cause D3 to be raised by the body not the dosage of this supplement. Pls make sure you insist your Dr orders D3 and CMP. Very important. You most likely have to ASK your Dr to order this (sadly) !!

Dr. Berg's video on Vitamin D3 needing to be combined with K2 at a higher dosage was helpful. With health provider approval, my formerly insufficient D levels have been corrected. I feel this has supported my immune system (fewer and milder illness) to to my sense of well being. The pill is easy to swallow and easy to incorporate into my daily supplements.

Dr Berg's products are great supplements, third party tested. If you don't get much sunlight it's a great product and I take it at night time before I go to bed because that's when your body needs it to heal

I like this combined vitamin very much. First, 10.000 IU vit D3 per capsule (I never take a capsule but drop the powder in water and drink) and then the additional K2 you need as well. I take it now every day and feel the difference already.

Great

must try

Good Quality, I bought this for a friend of mine who came out of a very hard disease and she's taking this supplement daily and is so happy with it, also very fast delivery

my 1st purchase was on January 2025 and I feel significant healthier than before regarding my knee pain and overall ...I used to get this "insufficient level" result of Vit D before I consumed this. Then after 4 months consuming Dr.Berg Vit D3 10000iu +K2 , I had my Vit D level checked again and the result showed "sufficient level" on May 2025. I'm happy that this supplement actually works. For maintenance I consume 5000iu now.