Roasted nuts are not necessarily bad for you, but it depends on the roasting method and the type of nuts you consume.
When nuts are roasted, they lose some of their moisture and become more concentrated in nutrients, such as healthy fats, protein, fiber, vitamins, and minerals. However, roasting can also cause some damage to the nuts' unsaturated fats, reducing their nutritional value.
In addition, some commercial brands of roasted nuts may be roasted in oils that are high in saturated or trans fats and may contain added salt or sugar, which can be harmful to your health if consumed in excess.
Therefore, it's important to choose roasted nuts that are minimally processed, without added oils, salt, or sugar. You can also roast your own nuts at home using a dry roasting method in the oven or air fryer to preserve their nutritional value and flavor.
It's also essential to consume roasted nuts in moderation, as they are calorie-dense and may contribute to weight gain if consumed in excess. A serving size of roasted nuts is typically 1 ounce, or about a handful. Incorporating a variety of nuts in your diet can provide numerous health benefits and is a great way to snack on nutrient-dense foods.