The best protein powders cost anywhere from around $0.95 to $2.00 or more per serving. The price depends on the type of protein used, whether they’re third-party tested, and where they’re manufactured. For example, whey protein isolate is more expensive than whey concentrate because it undergoes more filtration to remove the lactose. Similarly, third-party verified protein powders and those made in the US cost more because their quality tends to be better. Plant-based protein powders are also more expensive because there is less demand and they require more processing.