For those with hair loss symptoms, how do you manage the crown area?

Lately, when I go to the bathroom and look in the light, I can see white patches of scalp on the top of my head.

My hair has gotten thinner and isn't as thick as it used to be, so I should use hair loss shampoo.

I'm thinking of switching to brewer's yeast shampoo or products like the Dr. Groot advertised in commercials. I'm wondering if they are effective.

Actually, I realized that products like this only provide improvement, not a cure. I'm scared to go to a hair loss clinic all of a sudden, so I'm conflicted.