I would like to get a recommendation for a scalp care ampoule^^

These days, I'm concerned about scalp health, but I'm worried about my hair loss. I'm careful with shampoo, conditioner (treatment), and even hair packs, but the hair loss is still stressful.

So, I'm thinking about getting a scalp care ampoule. I'd like some recommendations on which one would be good for oily scalps.

Can anyone recommend some good ingredients for hair loss?

Brewer's yeast doesn't work well for me. And I'd like a recommendation for a non-irritating ingredient.

Or, if you have any recommendations for scalp care ampoules, I think that would be good too. If you have found any effective products, please let me know.^^