Spirulina protein powder, derived from the blue‑green algae Spirulina platensis, is a high‑biological‑value, plant‑based protein used in sports nutrition, functional foods, and dietary supplements. Its rich profile of essential amino acids, antioxidants, and micronutrients makes it a strategic ingredient for health‑conscious consumers. The Spirulina Protein Powder market size was estimated at USD 210 million in 2025, and the market forecast projects growth to USD 380 million by 2033, delivering a CAGR of approximately 7.5% for the 2026‑2033 horizon. This growth outlook is driven by rising demand for sustainable protein sources, increasing consumer awareness of plant‑based nutrition, and supportive regulatory frameworks for novel foods. Key forces shaping the industry include rapid technology shifts in algae cultivation and downstream processing, evolving regulatory standards that facilitate market entry, and changing consumer behavior toward clean‑label, eco‑friendly products. North America currently commands the largest market share, while the Asia‑Pacific region is emerging as the fastest‑growing market due to expanding middle‑class populations and heightened focus on functional health foods.