Is it okay to use it as a preventive measure with hair loss shampoo?

I'm not experiencing hair loss yet, so I'm not using any hair loss products.

Everyone says it's better to prevent hair loss in advance.

These days, there are really many shampoos for hair loss, and they all seem good.

Is it okay to use it in advance even if I don't have hair loss? There shouldn't be any side effects like overnutrition, right? Haha.

If there are people using hair loss shampoo even though they don't have hair loss yet, I'm curious about their reviews.

I'm curious if there might also be a preventive effect when used.