Been using over a year now. Almost time to purchase another bottle. Not all vitamin d3 supplements are created equal for good results. In 2023 i was using another brand I thought I could trust. Vitamin d bloodwork test results are supposed to be between 30-100. On 12/2023 my level was 24. Too low. I switched to the Members Mark brand. 8/2024 bloodwork came back 32. And the latest test 8/2025 came back 41. Its gradually getting better and better. I also take a separate K2 supplement at the same time. It helps to deliver the d3 to the appropriate location, instead of turning into calcification in your veins and arteries. Which is not a good thing. This is a great proven product at a great price.

Have been taking these ever since have low Vitamin D level and have had normal readings so I guess they work.

I’ve used this for many years now & my 🩸 work always comes back 👀 perfect 👍🏼. I recommend this to all my friends.

Excellent price and value. Members mark is a trusted generic Samsclub brand that exceeds name brand quality at significant value. Easy to swallow gel caps.

My wife and I have taken these for a couple of years. We don't spend much time in the sun so these are our substitute. My blood tests indicate normal Vitamin D level.

Ive been using these D3 vitamins for about 8 years. My medical lab tests have constantly shown a good level of D in my system. Also, D3 is very helpful with reducing pain i experience from peripheral neuropathy.

Very good value for D3

Great price on a great item!

I am 82 and my doctor told me to take these several years ago.

good price quality product