Peanut oil comes from peanuts. It is also called groundnut oil. Peanuts are actually from the bean family and they are native to Paraguay, South America however, they are immensely popular the world over. According to Dymock this plant reached India through China. It does not appear to have been cultivated for more than 150 years. 
The oil has a strong peanut flavor and aroma. It is often used in American, Chinese, South Asian and Southeast Asian cuisine, both for general cooking, and in the case of roasted oil, for added flavor. Peanut oil finds many uses for personal health because of its properties. But, that is not all. Peanut oil does have many other prominent health benefits, those that impact millions of people.

1. Boosts Heart Health

Peanut oil is cholesterol-free, which is one of the major factors contributing to complicated heart conditions such as atherosclerosis. Since groundnut oil is used in many different ways, eliminating this dangerous cholesterol from your body can help prevent a variety of health complications.

2.  Controls Cholesterol Levels

Peanut oil also contains monounsaturated fatty acids, like oleic acid, which increases the levels of “good cholesterol”, called HDL, in the blood.  This beneficial cholesterol actually helps to scrape off and reduce bad cholesterol (LDL) and lower your risk of developing coronary heart diseases and strokes.

3. Anti-cancer Potential

Peanut oil contained phytosterols and in particular beta-sitosterol, which may have the ability to protect the body from colon, prostate, and breast cancer. “Anticancer effects of phytosterols” suggests that these natural plant compounds have the ability to inhibit carcinogen production and cancer-cell growth Consumption of phytosterols may also be positively linked to increased activity of antioxidant enzymes and reduced oxidative stress.

4. Lowers Blood Pressure

Peanut oil contains Resveratrol has another important function in the body. It interacts with various hormones that affect blood vessels, like angiotensin, which constricts vessels and arteries. By neutralizing the effects of that hormone, resveratrol helps to decrease blood pressure, which reduces stress on the cardiovascular system.

5. Relieve Joint Pains

Peanut oil contains polyunsaturated fatty acids therapeutic potential in treating joint pains in the case of rheumatoid arthritis. The oil could be used to relieve debilitating joint pains. Peanut oil is applied to the skin directly and massaged well, and this may offer some relief.

6. Prevents Cognitive Disorders

Peanut oil contains the vitamin E it may play a significant role to promote cognitive health. Further vitamin E may promote healthy brain aging in the elderly. The nutrient may also reduce the risk of Alzheimer’s disease. Vitamin E supplementation was also found to boost motor activities in individuals.

7. Skin Care

Peanut oil, like many vegetable oils, is quite rich in vitamin E, which is an essential vitamin for human beings. It is particularly important for the maintenance and health of the skin, protecting it from the effects of free radicals that cause wrinkles, blemishes, and other signs of premature aging. The vitamin E in peanut oil keeps your skin looking young and healthy as you get older.

8.  Treat Scalp Psoriasis

Peanut oil contains the vitamin E may aid the treatment of psoriasis, including that of the skin and scalp. Anecdotal evidence suggests that the antioxidants in peanut oil may treat dandruff, and in some cases, can aid the treatment of scalp psoriasis. This could be attributed to the moisturizing properties of peanut oil.

9. Boost Hair Growth

Some research suggests that the ingestion of vitamin E supplements may boost hair growth.
The topical application of vitamin E may reduce protein loss from hair and make it thicker. The oil is also thought to moisturize split ends and regenerate damaged hair.

10. Improve Insulin Sensitivity

Peanut oil contains oleic acid, which was found to improve insulin production in type 2 diabetes. A diet high in peanut oil can also reverse the negative effects of inflammation on type 2 diabetes. Peanut oil also contains polyunsaturated fatty acids. These are healthy fats and it may improve blood glucose levels, treat insulin resistance, and enhance insulin secretion capacity. Replacing dietary saturated fat with polyunsaturated fat improved insulin secretion in those with diabetes.
A combination of monounsaturated and polyunsaturated fats (as present in peanut oil) may also enhance insulin sensitivity in individuals with diabetes.

11. Provides relief from constipation

Groundnut oil also has laxative properties. Including this oil in your daily diet, even as little as one teaspoon of oil can help in relieving the symptoms of constipation.

12. Boosts Immune System

A final benefit of the impressive levels of resveratrol in peanut oil is the improvement of your immune system. Viral and fungal infections are particularly susceptible to this antioxidant, so adding peanut oil to your diet can keep you healthy in yet another way, by stimulating your white blood cell production to fend off any foreign agents in your body.