Brittle and breakage
Dreads Hair and Scalp Health
Absolutely use ACV every time. it doesn't have to be much. But baking soda is a base. That means it is raising the pH of your scalp and hair above what it's normal range is. In organic material, a change in pH of anything over .05 is HUGE. BS changes your pH by around 2-3. This makes your hair much drier and more brittle. It'll also make your scalp itch like crazy in between washes. The ACV is used to reset your pH back to normal. if you don't use it, then you are leaving your hair dry and brittle for long periods. This will effect it, making it brittle and break.
Oils are not 100% needed, but they do help with keeping you from itching in between washes. Some of them, like teatree and rosemary, have properties that are good for the health of your scalp. I'd recommend you add these to your wash every time