Olive oil- The commonly consumed, least processed olive oil is extra virgin and virgin olive oil. They are high on MUFA and polyphenols hence ideal for heart health. Olive oil has antibacterial property. Studies have shown beneficial effects on skin allergies and rashes. The phytonutrients in olive oil has shown positive effects on preventing diseases like Cancer, Heart diseases, oxidative stress, blood pressure, diabetes, obesity, stroke, osteoporosis and depression.