Rehmannic acid is primarily used in pharmaceutical and nutraceutical research due to its potential anti-inflammatory and immunomodulatory properties. It has been investigated for its role in supporting liver health, showing hepatoprotective effects in preclinical studies. The compound also exhibits antioxidant activity, which may contribute to its protective effects against cellular damage. In traditional medicine contexts, extracts containing Rehmannic acid are used to support digestive health and manage symptoms of fatigue and weakness. Ongoing research explores its potential in metabolic regulation and as a supportive agent in managing chronic inflammatory conditions.