Hydration and breastfeeding: why does it matter?

The human body is made up predominantly of water. The proportion of water varies with age and between individuals.

Water plays a vital role in the body, enabling it to transport nutrients to cells, eliminate waste, and maintain the body at the right temperature.

We lose between 2 and 2.5 litres of water every day and must constantly compensate for this loss. It is therefore necessary to obtain water through food and to drink additional water as well.

During pregnancy and breastfeeding, the body undergoes many changes, our fluid balance shifts, and it is therefore important to adapt your water intake accordingly.

Contrary to some beliefs, drinking more than necessary will not increase breast milk production, and restricting fluids during a weaning period will not reduce milk production. Scientific evidence consistently shows that neither increasing nor restricting fluid intake affects the volume of milk produced. One study analysed the differences in women between periods when they drank 50% more than their thirst dictated and 50% less. No significant difference in their lactation was observed[1]. 

Fluid intake must be maintained at all times to meet your needs, without going to excess in either direction.

In addition to the usual fluid losses (perspiration, urine, physical activity…), further losses occur during breastfeeding.

Water is therefore the best breastfeeding food supplement ! 

During breastfeeding, it is important to have a good fluid intake, through both food and drinks (water).

From a dietary point of view, the breastfeeding mother should eat a balanced diet, consume plenty of fruit and vegetables, and avoid foods that are too fatty or sugary.

In terms of drinks, it is best to favour water and herbal teas, and to avoid sugary drinks. A breastfeeding herbal tea is the perfect ally for staying well hydrated while supporting your milk supply.

During breastfeeding, you can perfectly well drink tap water. Mothers who are concerned can request the water analysis results from their local council. You can also use water filtration devices. 

For breastfeeding mothers who prefer bottled water, it is best to choose low-mineral water (such as Mont Roucous), which will help avoid water retention and limit renal load for the new mother.

During periods of intense heat, go into open-bar mode and offer your baby the breast frequently.

An exclusively breastfed baby has absolutely no need to be given water — see our article on giving water to a breastfed baby.

During breastfeeding, the mother needs a higher fluid intake, of around 700 ml per day.

The breastfeeding mother should ensure she drinks water throughout the day to meet these additional needs. The infant receives the nutrients and water it requires, sometimes to the detriment of the mother, and the quantity of milk produced depends on the baby's demand.

Listen to your thirst and you will have every chance of maintaining good fluid balance.