Is Vitamin D3 better than D2?
We understand there is a lot of misinformation on the market about Vitamin D, and it is our mission to provide only the best Science -Backed info! That is why we back all of our products up with research and dose them at the amounts found in the research too!
Here's what we found regarding D2 vs. D3:
When considering supplementing with Vitamin D for all of its many health benefits, vitamin D2 may be good but D3 is certainly better. The simple explanation is that your skin has a form of cholesterol in it that acts as a precursor to Vitamin D. When bare skin is exposed to the UVB rays of the sun, the energy converts the cholesterol to Vitamin D3 - not D2. This makes D3 not only the most potent form of D, but the only form of the vitamin that is synthesized in the human body. Which means it is better at assisting with calcium.
It's important to know that D2 (ergocalciferol) is derived from plants while only D3 (cholecalciferol) is produced by the body. D3 is more effective because it is better able to raise serum levels of 25(OH)D -- the major circulating form of vitamin D -- and better able to bind to vitamin D-binding protein in plasma, which transports vitamin D to tissues.(1) 1. Houghton LA, Vieth R. The case against ergocalciferol (vitamin D2) as a vitamin supplement. Am J Clin Nutr. 2006;84(4):694-697. PMID: 17023693.
Research also shows that D3 is 87% more potent than D2, which results in 2 – 3 times more storage of Vitamin D. This is critical for those who might struggle with the ability to produce, absorb, or store the necessary amounts of Vitamin D for good health. Also, D3 is less toxic in higher concentrations and has a longer half life in the body, as well as a longer shelf life in the store.
We've provided research to back all this up in our article here: http://blog.realdosenutrition.com/vitamin-d2-versus-d3-5-things-know-buy/