: This is the most consistent source for the entire product line. You can find the for dry hair and the Thickening Shampoo for fine hair in multiple sizes, such as 16 oz and 32 oz.

: Useful for finding travel sizes, discontinued packaging, or bundled "duo" deals for shampoo and conditioner.

: A professional beauty wholesaler and retailer that stocks Onesta for both salon professionals and retail customers. Buying Guide by Hair Type

: A top-rated merchant that carries a wide selection of Onesta products, including shampoo and conditioner liters.

: Walmart's "Premium Beauty" section stocks various Onesta shampoos, often through third-party professional beauty sellers. GoSupps