I use apple 🍎 cider vinegar.
In my hot drink.
Hot water
Apple cider vinegar
Honey
Lemon 🍋

I do not use apple cider vinegar but drink regular apple cider for constipation. It seems to usually help

I only add about a teaspoon or just a bit more to my hot water drink.
You don't want it to overpowering the other ingredients.

I tried it a long time ago and never saw a difference. But it is worth a try. I don’t remember the dosage. They say to stick with the original Bragg brand if you are going to try it.