7 of the Best Vitamin D3 Supplements for 2019
The emphasis here is on vitamin D3 because this is the most bioavailable form of vitamin D (14,15). Research consistently shows that taking vitamin D3 is more effective at increasing serum 25(OH)D levels, which is how we measure vitamin D in the blood (16,17,18). As such, D3 is the best form of vitamin D - and is the one you should always look for.
DA: 90 PA: 18 MOZ Rank: 14