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Important caution: Given the dual role of glutathione in cancer biology, glutathione or NAC supplementation should NOT be taken during active cancer treatment without oncologist approval, as it could theoretically protect tumor cells from therapy [2][5]

Nerve impulse transmission Choline is a precursor for acetylcholine, an important neurotransmitter synthesized by cholinergic neurons and involved in muscle control, circadian rhythm, memory, and many other neuronal functions

doi: 10.3389/fendo.2026.1822475 Received 03 March 2026 Revised 05 May 2026 Accepted 02 June 2026 Published 18 June 2026 Volume 17 - 2026 Edited by Carmine Bruno, Link Campus University, Italy Reviewed by Matej Rakusa, University Medical Centre Ljubljana, Slovenia Fredrik Tiberg, Camurus AB, Sweden Updates Copyright 2026 Dominikowski, Rko, Olejarz, Szczepanek-Parulska, Domin and Ruchaa

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IGF-1 signaling and muscle regeneration: IGF-1 variants