Helle Sydendal is a Danish journalist, author and speaker specialising in hypothyroidism. Diagnosed with Hashimoto's thyroiditis herself, she has written two books challenging standard treatment in Denmark - the bestseller Få livet tilbage and the 2025 follow-up Nu er det din tur - and runs the information platform LavtStofskifte.info alongside an active lecture circuit.
Helle Sydendal's second book, Now It's Your Turn - a book about low metabolism, was released on July 25, 2025 and focuses on alternative treatment options for metabolism patients in Denmark.
In connection with the book's publication, Helle Sydendal signed books at Bog & idé in Holbæk on August 1, 2025.
Helle Sydendal presented her case to the Health Committee in the Danish Parliament and argued that Danish metabolism patients deserve access to newer treatment forms.
An updated 3rd edition of Get Your Life Back was released in 2023 with new knowledge about diagnosing and treating low metabolism.
