Science v/s Tradition

Evening primrose oil has been suggested for many other uses, based on tradition or on scientific theories. However, these uses have not been thoroughly studied in humans, and there is limited scientific evidence about safety or effectiveness.

Alcoholism
Anti-inflammatory
Asthma
Atherosclerosis
Attention deficit hyperactivity disorder
Breast cancer
Bruises - used as cream
Cancer
Chemotherapy-induced neuropathy (nerve damage)
Chronic fatigue syndrome
Crohn's disease
Cystic fibrosis
Dry, rough, scaling skin (ichthyosis vulgaris)
Fibroadenomas
Hangover
Heart disease
Hepatitis B
High cholesterol
Hot flashes
Inflammation
Irritable bowel syndrome
Kidney and bladder stones
Lupus
Melanoma (skin cancer)
Multiple sclerosis
Obesity
Pain
Postmensopausal symptoms
Postnatal depression
Preeclampsia (high blood pressure during pregnancy)
Preventing preterm delivery
Promoting easier birth
Raynaud's phenomenon
Schizophrenia
Sjogren's syndrome
Skin conditions in dialysis patients
Stomach pain
Ulcerative colitis
Weight loss
Whooping cough (pertussis)
Wounds - used as cream

Source (table): Harvard medical school