I love these vitamin D3, they are easy to swallow and acts as an antibiotic. They does exactly what they say will do. I have been taking these now for a while and I have yet to catch a cold during the winter weather. I usually would get bad sinus infections all the time, since I've been taking these D3's I have not had a sinus infection. This is the truth, if you are not taking these you are missing out and if you are taking these and have not noticed a different your could be taking them wrong. I noticed that you have to get a very high dosage in your system in order for these to work right. If my review was helpful to you in any way, I would really appreciate if you would click the yes button below. Thanks