The journey of turning raw ingredients into protein powders is complex and varied. Not only does the sheer number of types on offer make it tricky to settle on the best protein powder for your goals, but the methods behind their processing can, at times, mystify. In some cases, they’re entirely hidden from you as a customer.
Commonly, proteins are extracted through chemical or enzymatic processes - such as hydrolysis, ion exchange, or alkaline extraction - or through purely mechanical means such as ultrafiltration or microfiltration (7). The quality and integrity of the proteins can differ vastly depending on the methods used. There are also different forms of protein powders - typically concentrates, isolates, and hydrolysates - each of which involves an increasing number of processes, respectively, to extract higher protein content.
Soy, pea, and rice protein powders are typically made using an alkali extraction process involving hydrochloric acid, sodium hydroxide, potassium hydroxide, and hydrogen peroxide. Whey protein powder production typically avoids the use of chemicals, instead going through a purely mechanical filtration process.