Key Takeaways Stress, caffeine, and hormone changes are common triggers for heart palpitations
For most researchers, that's 0.52mg orally or 0.251mg sublingually once daily
doi: 10.3389/fphys.2026.1760997 Received 04 December 2025 Revised 18 February 2026 Accepted 23 February 2026 Published 20 March 2026 Volume 17 - 2026 Edited by Lars Knudsen, Hannover Medical School, Germany Reviewed by Svetlana Guryanova, Institute of Bioorganic Chemistry (RAS), Russia Ana Maria Jaramillo, University of Kansas Hospital, United States Updates Copyright 2026 Costello and Birket
In general, previously published data show that patients with controlled hyperthyroidism are not considered to be at higher risk of contracting COVID-19 (51, 52), but there are two exceptions
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