Been taking this supplement since 2017 (WOW - I was curious and looked up my first order - how time flies! I have maybe had 2 colds since I added this into my daily routine - and have never contracted Covid as of yet. I imagine this product plays into my immune system's health. Vitamin D is vital and most people are very low on it and for some reason doctors don’t even test Vit D levels in routine blood work...you have to specifically ask for it. The system is broken so we have to be our own advocates! I love that I can get the anti-inflammatory benefits of Turmeric along with my D3 and that it’s a fermented product that is more bioavailable as well.