Cuasia/Bitter bark

1. Digestive health
Stimulates digestion: The bitter taste of barks can stimulate the production of saliva, gastric juices, and bile, which are essential for proper digestion.
Relieves digestive discomfort: They may help alleviate indigestion, bloating, gas, and constipation by promoting better breakdown of food and regulating gut motility.
Supports gut health: Bitter barks may help heal inflammatory damage to the intestinal walls and improve nutrient and mineral absorption. 
2. Anti-inflammatory properties
Reduces inflammation: Bitter compounds, such as alkaloids, flavonoids, and terpenes, found in barks are known for their anti-inflammatory activity.
Relieves pain and stiffness: Some barks like willow bark contain salicin, which can have pain-relieving effects, similar to aspirin, according to Medicinal Forest Garden Trust. 
3. Blood sugar regulation
Supports healthy blood sugar levels: Certain bitter barks, like quassia, may help regulate blood sugar levels by impacting insulin function and glucose transport.
Helps with diabetes: Bitter melon, a bitter herb, is traditionally used to lower blood glucose levels and might help with insulin release and usage.