It is recommended to eat a variety of food from all the groups shown in the Eatwell guide below:
Mechanically processed foods that are ground, heated, pasteurised or washed don't tend to lessen the healthiness of the food. Canning even helps lock in nutrients and adding ingredients such as fiber, calcium, and vitamin D can make them better for you. More information can be found here: https://www.webmd.com/diet/ss/slideshow-processed-food
Chemically processed foods on the other hand, add artificial ingredients such as sodium, sugar and trans fats which can be harmful in excess. Research suggests eating 10% more of these ultra-processed foods can lead to a 10% increase in the risk of cardiovascular issues:
While frying can be a quick and inexpensive way to cook, studies find eating more fried foods can increase the risk of developing type 2 diabetes, heart disease and obesity. Acrylamide can also form while cooking starchy foods, and this toxic substance can pose a risk of cancer. For a healthier option use coconut, olive or avocado oil, and oven or air fry your food as explained here: https://www.healthline.com/nutrition/why-fried-foods-are-bad
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