Radish supplements come from the root or sprouting seeds. The plant encourages bile release from the gallbladder, which can make fatty meals feel less heavy. Most of this knowledge comes from long standing herbal tradition and early animal studies.
People usually take radish as a capsule or liquid extract. Capsules work best right before a meal. Liquid extracts can be measured into a glass of water and sipped alongside food.
Raw radish belongs to the cruciferous family and contains natural goitrogens. In high amounts these compounds can bother the thyroid. Typical supplement doses rarely cause a problem, but anyone managing a thyroid condition should speak with a doctor before starting.