I wanted to take a Vitamin C supplement that would be powerful during this time of the COVID-19 pandemic. I have a low immune system to begin with, having suffered two bouts of pneumonia in the past three years with a very severe hacking cough both times. Right before the COVID-19 pandemic was announced, I broke my foot so my immunity is probably even lower than normal and I am still in a cast. I also have an Ulcer history so I cannot take ascorbic acid. All these medical issues meant I had to be careful. So I bought this Immune Support because it is Ester-C, so I knew it would be gentle on my stomach. I liked what I read about it, and the fact that it works for 24 hours, which I guess means it may be time-released. Not sure about that part. However, I take two per day for extra protection. I do know I feel much better when I take it, more energy, and I did not develop a cough during the past month. The tablets are large. I think they are coated and for me they are not difficult to swallow, but just thought I'd mention it because that may be of concern to some. Otherwise, considering I am lying in bed with a cast on my leg, I feel good. The expiration date is also excellent. I love this product and recommend