1. Maintain good dark light vision 2. Maintain the integrity of skin and mucosa 3. Regulate and control the activation and expression of mrna in the nucleus through retinoic acid receptors in the nucleus 4. Maintain and promote immune function 5. Promote growth and development and maintain reproductive function 6. Regulating various pathological states, isomers promote terminal differentiation, inhibit proliferation, promote apoptosis, and have certain effects on tumors in the process of tissue malignant transformation 7. Promote the production of hemoglobin and increase the intake of iron in food | 
China
