In the spring of 2003, he started to use his old-fashioned (from previous millennia) and modern biochemistry knowledge and improved his own health and weight on a low-carb, high-fat (LCHF) diet. Dr Hammarskjöld is now actively promoting LCHF as well as opposing medical myths, such as statin deficiency and high blood pressure due to high-salt intake. He has published more than 17 PuBMed articles between 1997 and 2018. His main information site now is his blog Kostkunskap (Diet knowledge). For more information, email Dr Hammarskjöld at bjorn@hammarskjold.nu or visit his blog site at http://www.kostkunskap.blogg.se.