A total of 2 reviews of this product on Reddit.
Yes, vitamin D3. My vit d levels were very low so I went ahead and got these vitamin D3 supplements from Amazon. After about two weeks my energy levels were a LOT better and I didn’t need a nap every afternoon 😀
I just take pills every day and my vitamin d is fine. Most people need to supplement in the United States.
These are the ones I take and they raised my vitamin D levels, so they must work, plus they’re very small.