Peanuts are toxic and are legumes just like soy and beans. They contain aflatoxin, a potent carcinogenic compound in fungus that grows on grains and legumes. They contain toxic lectins which lead to autoimmune dysfunction, leptin resistance, tissue deterioration, poisoning, inflammation, and a whole slew of other issues. They contain agglutinins, proteins which cause binding of other proteins and generate random clotting of blood, and this goes for high blood glucose as well, and promote metastatic response of cancer and cancer-like tissues. They contain an obnoxious amount of polyunsaturated omega-6, which is the same as those rancid vegetable oils and is pro-inflammatory and atherogenic (causes atherosclerosis).
I would stick with other forms of fat like butter or even virgin coconut oil. Peanuts, like grains, have been blown out of proportion as a health food and it's completely wrong.