Not many supplement companies manage to combine high quality with low cost, but NOW Foods is well known for that. It's very difficult to get the vitamin D you need from your diet; oily fish and fortified dairy products are the only important sources. That's why supplements are recommended for most adults. The form known as vitamin D3 is usually recommended, but vitamin D2 is also effective; for best results, take vitamin D with a meal that contains a little fat.
If you want to make sure you need this supplement, request a blood test; levels of at least 30 nanograms per milliliter are considered to be the best. The following are ten of the most notable mentions of trustworthy supplement brands; five of which are premium professional brands and the other five are slightly more affordable.