Sorry to break it to you, but French fries aren’t bad just because they make you gain weight.
Firstly, potatoes are high in carbs by nature, as a single medium potato can give you up to 35 grams of carbs (and only 2 grams of fiber).
Even so, roasted or baked potatoes with other healthy ingredients on the side remain a healthy option you can pursue confidently.
However, if you take that potato and deep-fry it in vegetable oil, the results are devastating in the long run.
According to this review published in Critical Reviews in Food Science and Nutrition, the process of frying foods creates toxic compounds such as advanced glycation end products (AGEs). Such compounds can increase your long-term risk of cancer, inflammation and type 2 diabetes.
If you want a healthier alternative which resembles the texture of French fries, you can roast sweet potatoes as they’re much more nutritious.