The Seaweed-Based Anti-Aging Ingredients Market is projected to grow from USD 1,803.1 million in 2025 to USD 5,806.7 million by 2035, at a CAGR of 12.4%. Anti-aging & firming will dominate with a 55.6% share, while brown algae will lead the source segment with 49.5% share in 2025.