A fatty acid present in the body involved in metabolism which transforms glucose into energy. It is a powerful antioxidant which is synthesized in the body and also comes from external input (liver, meat, fish, green leafy vegetables, yeast). There is still no definitive scientific evidence for its usefulness in the treatment of diabetic neuropathy (Han 2012), hepatic dysfunction, certain encephalopathies, pain relief, glossodynia (Carbone 2009) and multiple sclerosis (Khalili 2014, Yadav 2010, Namaka 2008). It is generally well tolerated if the dosage and duration indicated in the manufacturer’s directions for use are not exceeded, but it can have adverse effects. Cases of autoimmune hypoglycemia syndrome (Michalopoulou 2015, Bresciani 2011, Uchigata 2007) have been attributed to its consumption, as has hepatic cholestasis (Ridruejo 2011), poisoning (Hadzik 2014, Karaarslan 2013) and seizures, especially in children (Tolunay 2015). Dermatitis has been reported due to contact with an anti-aging cream containing lipoic acid (Bergqvist 2006). Since the last update we have not found published data on its excretion in breast milk. It has been used to treat postpartum perineal pain without presenting problems during breastfeeding (Costantino 2015). Consumption in moderate doses following medical prescription would have little risk during breastfeeding. When used topically, do not apply to the nipple so as to avoid its ingestion by the infant.