Anyone can cherry pick a few studies especially from the alternative type journals.
You have to look at the overall picture.
Sadly it seems supplements very rarely live up to the hype.
Vitamin supplements are very rarely needed
Antioxidants, pre and probiotics supplements are of no real proven benefit.
Even fish oil supplementation fails to live up to the huge hype.
Eat mostly good food and take a vitamin supplement if you have a diagnosed deficiency. otherwise your pissing a lot of money away.