The type dimension of the High Protein Bars market is divided into five primary protein sources: whey protein, plant‑based protein (e.g., pea, soy, rice), milk‑protein isolates, egg‑white protein, and blended formulations that combine two or more sources. Whey protein dominates due to its high biological value and rapid digestibility, accounting for roughly 45% of total bar volume. Plant‑based variants have captured a growing share—estimated at 30%—driven by vegan consumer trends and allergen‑free positioning. Milk‑protein isolates contribute about 12%, offering a balance of casein and whey characteristics, while egg‑white protein, valued for low‑fat content, holds a niche 5% share. Blended formulations, which aim to optimize amino‑acid profiles, represent the remaining 8%. Each sub‑type influences the overall market size by shaping supply chain requirements, pricing structures, and regulatory compliance, thereby forming a detailed market taxonomy that underpins strategic forecasting.