Horse shampoo does not help human hair grow faster. Instead, it makes the hairs swell and appear like they have added depth, which can make it look like the hairs have grown.
Animal-related products like shampoo usually do not have any chemicals or manmade substances. As a result, the natural ingredients can have a positive impact on human and horse hair. Many people have reported differing results when using horse shampoo, with many claiming their hair feels thicker.
For people who are considering using horse shampoo on their own hair, experts recommend Mane 'n Tail, which also comes in a number of other products like conditioner and herbal hair treatments.