Immune digestive support sales will expand through 2036, with capsules at 37.0% within the form segment, plant-based at 34.5% of the source category and immunity at 41.0% of health benefit demand in 2026. The market was valued at USD 1,437.8 million in 2025 and is forecast to record an 8.5% CAGR between 2026 and 2036.