Ergocalciferol
"This D2 saved my life; I was having so many problems with my digestive issues, acids, bloating, constipation, IBS, nausea and pass-out feelings, fatigue-anemia symptoms, etc.. and now everything is gone. At first I was worried about 50,000iu pill for being too strong, but please trust me, the first 24hrs of the very first pill was the best day of my life in 4 years; it was a good decision to take this pill and I recommend everyone to go for it. I am not an expert, but definitely there is a very good reason why our doctors prescribing D2 instead of over the counter D3 supplements, and I am enjoying it and thanking my doctor in my prayer every night."