Is there a point of no return for hair growth?

I had a good head of hair till I was 38 but the it started receding on the sides and now it’s thinning down the middle. I’ve been taking fin for almost two years now, prolly too late. Not seeing any improvement. I bought a case of minox and tried some around almost bald areas around forehead but it only removed the existing hair. I feel I will go bald by 42

We are not 100% sure if there is a point of no-return for hair loss, but if there is, it certainly happens in older men (greater than 40, possibly 50). A family friend went on finasteride for his prostate at age 70 and much to his surprise, his frontal hair partly regrew which he proudly showed to me. So maybe there is no point of no-return.

I believe that since your started losing hair at 38, now at 40 you have an excellent chance of reversing it because the time interval between the loss and now is relatively short.