Forest frogs, commonly known as hazel frogs, are highly valuable amphibians. The dried oviducts of female forest frogs are a precious traditional Chinese medicinal material called hazel frog oviduct oil. As a rare dual-purpose edible and medicinal tonic, forest frogs deliver prominent effects such as moistening the lungs to nourish yin, tonifying the kidney and replenishing essence, as well as nourishing the brain and improving intelligence.

Hazel frog oviduct oil contains 56.3% protein, 3.5% fat, 4.7% minerals and 27.5% nitrogen-free organic compounds, plus 18 essential amino acids and various trace elements required by the human body. The frog meat is tender and delicious, containing 79% protein when dried, making it a delicacy for feasts.