How to fix stringy ends??

Hello! (24f) I have a lot of problems with my hair lol but this is about stringy ends...how do you fix them? I just got it cut a month ago so thats not the solution I know a lot of people would recommend. I feel like a better question maybe is how to get my hair healthier and fuller?

Im currently taking prenatal vitamins, I use oil and serum, moisturizing products, heat protectant...

Is there anything in particular that helped you?