The breastfeeding mother's diet influences the nutrient content of breast milk. Certain nutrients can be influenced by diet. These include
- Water-soluble vitamins (e.g. B vitamins)
- Vitamin D
- Omega-3 fatty acids

The taste and odour of breast milk changes depending on what is eaten during the breastfeeding period.

Caution! Alcohol, caffeine and nicotine pass into the milk of a breastfeeding mother. Breastfeeding mothers should avoid alcohol and nicotine during the breastfeeding period and only consume a limited amount of drinks with caffeine.