Risks of a protein diet during pregnancy
Lack of carbohydrates for fetal development
Carbohydrates are the main source of energy not only for the mother, but especially for the growing fetus. The fetal brain requires glucose, which is the result of the breakdown of carbohydrates. In ketosis, however, the body switches to an alternative fuel - ketone bodies. However, these are not ideal or safe for the development of the fetal nervous system.
Metabolic overload
Pregnancy itself is a great burden on the metabolism. Ketosis "burdens" the kidneys and liver, which must process a larger amount of nitrogenous substances from proteins and fats. This can lead to dehydration, electrolyte imbalance or increased acidity in the body - a condition called ketoacidosis, which can be dangerous for both mother and child.
Risk of nutritional imbalance
Protein diets exclude, especially in the early stages, fruits, whole grains, legumes and other foods rich in fiber, vitamins and minerals. This can cause a lack of nutrients that are key during pregnancy – such as folic acid, iron, calcium and vitamin C.
🍼 Why it is not suitable even when breastfeeding
Increased energy requirements
Breastfeeding requires approximately 500 kcal per day more. The body of a breastfeeding woman needs enough energy and fluids to produce quality breast milk. A protein diet is often calorie-restrictive, which can lead to a decrease in the quantity and quality of milk.
The effect of ketone bodies on breast milk
There are not enough studies to confirm the safety of ketone bodies in breast milk. Some sources suggest that they could affect the infant's metabolism, digestion or development. Therefore, ketosis is generally not recommended during breastfeeding.
The need for a wide range of nutrients
Breast milk is complex and its quality depends on the mother's nutrition. A limited range of foods in a protein diet can lead to deficiencies in key micronutrients that the baby needs for growth and development – such as iodine, vitamin D or omega-3 fatty acids.
✅ What instead?
Emphasis on a varied, balanced diet with plenty of fruits, vegetables, complex carbohydrates and quality proteins.
Gentle and natural return to original weight – during breastfeeding, most women gradually lose weight naturally.
Consultation with a nutritional therapist or gynecologist if a woman is significantly overweight during pregnancy.
