I'm a 59 year old male & receding hair in front of head and one spot in the back of the head. Can anyone tell me the best ingredient on the market to re-grow or will I be wasting my time and money??

Minoxidil (Rogaine). Other than that, it's probably hopeless.

What about the store brand ? CVS, Duane Reade, Etc.?

The product is sold as Rogaine (U.S. and Canada) and Regaine (Europe and elsewhere). Rogaine is manufactured by Upjohn. Upjohn's patents expired in 1996. I googled "Minoxidil" and I see that there are other brands on the market: Kirkland Minoxidil Walgreens Men's Minoxidil; Follicare Minoxidil; CVS Minoxidil. It appears to be available in 2%, 5%, and 15%.

Check at your nearby pharmacy. It's available Over The Counter in the U.S.