Sodium bicarbonate is the main active ingredient along with fennel and dill.
The one I used with my son was ginger and fennel seeds. Absolutely amazing!
It's basically sugar, ginger and water. $10 at walmart. I get mommy's bliss brand. It's real helpful when baby is gassy.
I'm not sure all of them, but I believe it's all naturone. Ginger is the main one, it helps calm baby's tummy and helps with fussing. It's seriously a life savor. A mom on here recommend it when my baby was really fussy. I have been using it ever since. It gets rid of her hiccups immediately and I give it to her before bed, and she is just super calm. It's really great. It's like $12 at the store.