Inhibitor of Nutrients Absorption II

Dietary fiber has the same effect. Other vegetables in the cruciferous family such as mustard greens, turnips, radishes, cabbage, broccoli and oil seed rape, have substances called glucosinolates that are capable of generating isocyanates, which interfere with the metabolism of iodine in the diet can cause goiter disease if they are abused and not compensated by intake of other foods that provide iodine, like fish.
2. Substances that interfere with vitamins
Some vegetables such as carrots, squash, cabbage, tomatoes and melons have an enzyme called ascorbasa that transforms vitamin C to dehydroascorbic acid which has no such capacity as vitamin C. Blanching of these foods destroys this enzyme and prevents the destruction of vitamin C.
3. Substances that alter the absorption of proteins
Other foods such as legumes, cereals and tubers have substances act on the ground to defend it from attacks by insects and microorganisms.