Primrose oil can improve some symptoms of diabetes and osteoporosis, according to WebMD. This oil, generally referred to as evening primrose oil, contains fatty acids and can also decrease inflammation.
Evening primrose oil increases the levels of gamma-linolenic acid in the body, according to HowStuffWorks. GLS levels can decrease in individuals who do not eat enough of the right fats, have poor thyroid function, consume too much alcohol or undergo radiation treatment.
Research shows that taking evening primrose oil daily improves nerve damage caused by diabetes over the course of six to 12 months, according to WebMD. The consumption of evening primrose oil with fish oil and calcium appears to increase bone density and decrease bone loss in elderly osteoporosis patients.