1. Efficacy: Cinnamomum cassia can warm the middle warmer, dispel cold, regulate qi and relieve pain, and treat soreness and weakness of waist and knees, impotence, infertility due to palace cold, cold pain in the stomach, chest obstruction, etc.

2. Taboo: Acute inflammation, lupus erythematosus, hyperactivity of fire due to yin deficiency and fever are prohibited. Do not use it with halloysitum rubrum.

The benefits of eating cinnamon:

1. Hypoglycemic: Cinnamon can improve insulin sensitivity and help control blood sugar level.

2. Antibacterial effect: Cinnamon is rich in antioxidant substances and volatile oil, which has a very good effect on fighting viruses and bacteria.

3. Reduce inflammation: Antioxidants in cinnamon can slow down the oxidation process of cells and inhibit inflammation.

4. Improve cardiovascular and cerebrovascular system: Some components in cinnamon can improve the function of cardiovascular system, promote vasodilation and reduce blood lipid and cholesterol levels.

The disadvantages of eating cinnamon:

1. Excessive cinnamon can lead to poisoning: cinnamon contains coumarin, and excessive intake can cause poisoning symptoms, such as dizziness, palpitation and dyspnea.

2. Adverse to pregnant women and lactating women: Pregnant women and lactating women need to be careful when eating cinnamon, because it may have adverse effects on fetuses and babies.

3. Interaction with some drugs: Some components in cinnamon may affect the metabolism and absorption of drugs and interact with some drugs. Cinnamon should be used with caution for people who are taking drugs.