The benefits are in the acidity. When a person eats too much sugar and starches the body chemistry gets alkaline. The vinegar returns the body back to a more neutral chemical make up.
This can help hair growth and the elimination of toxins, amongst many other things.
Apple cider vinegar is also a natural anti-inflamitory, both internal and external. Native americans used this vinegar to dampen clothes and wrapped it around swollen or deeply bruised areas.
When apple cider vinegar is combined with comfry root powder as an external poultice, the reduction of swelling is increased by 3 times. It heals twisted ankles and pulled muscles in 2-3 days as compared to 2-3 weeks with traditional oral medications.