As mentioned, some foods are not suitable for oven cooking. This is mainly due to the high temperature. Here are 5 foods that can become harmful if cooked in the oven, according to Planet.fr:

Certain starchy foods Acrylamide, a potentially carcinogenic chemical, forms when certain starchy foods (like bread or potatoes) are cooked at high temperatures. This is what a 2008 EUFIC report states.

According to this document, which relies on research from the WHO and FAO, this substance appears when starchy foods are exposed to temperatures above 120°C (248°F). This can occur in an oven.

Oven-baked fries As you might have guessed, fries are made from potatoes. Therefore, they are subject to acrylamide formation. According to the FAO/WHO Committee, fries represent between 16% and 30% of the total acrylamide intake in most countries.

Coffee (to avoid) According to the same EUFIC study, coffee accounts for a significant share (13% to 39%) of acrylamide exposure formed during high-temperature cooking. So, you should avoid putting it in the oven.

Red bell pepper Red bell peppers, particularly rich in vitamin C, lose much of their benefits when cooked. According to Bioconsommateurs, this essential vitamin starts to degrade above 50°C (122°F). Therefore, a red pepper cooked in the oven loses a significant portion of its nutritional value.

Frozen foods Before putting frozen meat or fish in the oven, make sure to completely thaw them. If you don’t, some parts may remain raw, which encourages bacterial growth. This could lead to food poisoning.