A natural substance found in apple peel may preserve muscle health as you age, a recent study from the journal Cell Metabolism suggests. In tests on mice, scientists discovered that ursolic acid helped promote muscle growth and prevent muscle weakening (a common problem among older adults).
The study's authors linked ursolic acid's muscle-protecting effects to beneficial changes in insulin (a hormone involved in muscle-building). Study results revealed that animals fed ursolic acid also experienced weight loss and had lower levels of blood sugar and cholesterol. However, it's too soon to tell whether ursolic acid might have the same impact on humans.
Apples contain a number of health-boosting compounds, including an antioxidant known as quercetin. Found to fight inflammation, quercetin shows promise as a natural means of keeping your blood pressure in check and controlling allergy symptoms.