The reason it became available to humans stems back to the benefits how the farmers found to their very skin once they were applying it to the cows.
This means for curing Psoriasis is not so great for decreases companies, as their revenue will plummet as no medicines are used. https://medium.com/@naturalskincare000/discover-the-best-plant-based-products-for-your-skin-ce89fe9c67aa