Pantothenic acid, dexpanthenol or vitamin B5 is widely distributed in nature being very abundant in meat, vegetables, cereals, legumes, eggs, milk, fruit and vegetables (MedlinePlus 2015), therefore its deficiency is very rare. The only recognized indication for administering pantothenic acid is to treat vitamin B5 deficiency. There is no evidence that it can be used to treat any other disease or condition. (MedlinePlus 2015). Daily requirements are 2 mg in infants, 4 in children, 5 in adults, 6 in pregnant women and 7 mg in breastfeeding mothers (Ares 2015, MedlinePLus 2015). Pantothenic acid is excreted in breast milk at a concentration of 2 to 2.7 mg/L (Sakurai 2005, Song 1984) with little variation throughout breastfeeding (Ren 2015, Johnston 1981) and is directly proportional to maternal ingestion (Song 1984, Johnston 1981). The concentration is higher in milk of mothers of premature babies than in full-term infants (Ford 1983). With a varied and balanced diet, supplements of this vitamin are not needed during breastfeeding, it is enough to adequately select the food in one’s diet (Song 1985). Topical use, most commonly used as panthenol or provitamin B5, regardless of its questionable efficacy, is compatible with breastfeeding.