Segmentation by types of bio‑active protein delineates the supply‑side architecture that underpins the market. Whey protein remains the largest category, prized for its complete amino‑acid profile and high bioavailability, supporting both functional food and sports nutrition uses. Plant‑based proteins (pea, soy, rice) have captured roughly 25% of the market, driven by vegan trends and allergen‑free positioning, and are increasingly incorporated into nutraceuticals and functional foods. Collagen peptides occupy a specialized niche, especially in cosmetics and medical nutrition, where their unique peptide sequences promote skin elasticity and joint health. Egg‑white protein offers a high‑quality, low‑fat alternative, contributing to niche functional food formulations. Microbial proteins (single‑cell proteins, algae) are emerging, accounting for a modest but fast‑growing share due to sustainability credentials and novel functional properties. Each type’s contribution to the total market is dictated by production cost, functional attributes, and regulatory acceptance, forming a detailed market taxonomy that guides strategic investment.