Complex b vitamin tablets should refer to vitamin B complex tablets, which work to relieve fatigue, improve immunity as well as boost metabolism. 1. Relieve fatigue: helps to relieve limb weakness as well as improve body weakness. 2. Enhance immunity: Chewable b-complex vitamins with vitamin C, hydrochloric acid and taurine have antioxidant properties, which can reduce the damage of free radicals on the body, improve immunity, improve body resistance, and help to alleviate anorexia, nausea, as well as malnutrition symptoms. 3. Promote metabolism: help to promote blood circulation, the body’s toxins and waste discharge, thereby accelerating the body’s metabolism. Chewable b-complex vitamins have been shown to cause irritability and anxiety, as well as skin allergies, such as itching and redness; chewable b-complex vitamins are contraindicated in people who are allergic to them. In addition, chewable b-complex vitamins have certain risks associated with their use, and patients need to be guided by a specialist.