Hi @floridaricvk, I usedto be one of those well meaning types that subscribed to emails from every health practioner that was selling miracle cures. Now, I don't bother.
What I find useful is information posted by companies that review studies and summarize them, Examine.com is free, and you can subscribe for additional services if you wish. They don't name the actual brand of supplement/food.
There is also an independent third party lab that test products to see what is really in them and also publishes study results of various supplements, foods, etc. I wish I had subscribed to this service earlier. It is very helpful and I consult it now before purchasing any supplement.
@sueinmn made some excellent points so I won't repeat them.