Please recommend a shampoo. I have hair loss, thinning hair, and fine hair.

It is exactly as the title says.

It’s a total disaster, from having a baby to getting gray hairs.

I don't know where all my thick hair went. I'm losing so much that it's really lowering my self-esteem. Is there a shampoo out there that makes my hair look voluminous? Please give me some recommendations.