Overcame a cold very quickly with this, amazing. Feel healthier in general, not getting sick at all after overcoming the cold and have been on this supplement for one whole bottle now. My skin is getting clearer as well as I've had some skin issues, some scaling, itching and blemishes. I also have chronic sinusitis all year around but I'm starting to notice a difference in this condition as well. I don't know if it's all attributable to this supplement but I'm sure it has continued due to the fact these changes happened the more I took this vitamin. I will continue taking this supplement as I feel it has had a positive effect. Liposomal version is the most effective form, don't believe me, research it yourself. Hope this helps.