Though this answer could depend on who you ask, yes, salon supplies are usually better than store-bought spa products. Many beauty products that you find in drugstores are diluted and not nearly as effective as their salon product counterparts. These lesser quality products are mixed with water, fillers, and chemicals, making them not just less effective, but potentially unsafe, too.
At the very least, they are not nearly as healthy as they claim. For instance, hair care products found in salons are made with high-quality ingredients that are concentrated and work together to hydrate and nourish your hair. Drugstore products simply can’t compete.