1. Helps lower blood sugar: cinnamon powder is thought to help control blood sugar, while black coffee contains caffeine and other chemicals that may also help lower blood sugar levels.

2. Improves metabolism: Caffeine can boost metabolism, while cinnamon powder is also thought to boost metabolism.

3. Improve digestion: The strong flavor of cinnamon powder may promote digestion in the gastrointestinal tract, while the caffeine in black coffee is also thought to help promote digestion.

4. Weight loss: Both cinnamon powder and black coffee are widely used for weight loss, as they may help burn excess fat.

It should be noted that the combination of cinnamon powder and black coffee may not be suitable for everyone. Cinnamon powder may cause allergies or adverse reactions for some people, while coffee with too much caffeine may cause discomfort, heart palpitations, insomnia and other symptoms. Therefore, it is best to consult your doctor before trying new drink combinations.