Medication or food to prevent hair loss from worsening?

I've heard that black beans are good... do they really have benefits?

I've heard that beer yeast is good... does it really work?

I did buy it, but I don't really eat it well...

I'm not sure if it really has any effectiveness...

It's already fallen out hair, so there's nothing I can do, but I want to prevent it from falling out any more.

After having two children, my hair has fallen out and become very thin...

It's just that my hair can't be styled or grown out beyond a bob or short bob...

It's sad... ㅠㅠ