Sunflower is considered one of the healthiest cooking oils and much of the discourse around healthy cooking oils is regarding the parameters that define âhealthyâ for us. These can be the smoking point (a high smoking point means the oil holds on to its nutritional content at higher temperatures), the good MUFA or monounsaturated and polyunsaturated fats (as against bad saturated fats), HDL (good cholesterol), and so on. These also have a direct correlation with our heart health and lung health, as the experts would have us believe.