A brand I trust
Spring Valley is a brand I trust.  When the Vitamin C I usually buy at Sam's Club was no longer available in 500 mg tablets, I decided to order these instead.  I have read that it's best to take 500 mg morning and night for the best results.  My doctor advised that Vitamin C is one of the supplements that does seem to be beneficial in boosting the immune system.
Rating: 5 stars