Always prioritize supplements that are transparent about their sourcing and manufacturing standards
The people who experience them are nearly always making the same mistake: too much, too soon
Notably, while excess iodine is well known to trigger thyroid autoimmunity in susceptible individuals, evidence from the literature is reassuring that an adequate iodine status (defined as a UIC between 100 g/L and 299 g/L) is safe in this regard [25, 26]
Furthermore, given the aforementioned purported mechanisms for the improving effects of L-carnitine/synbiotics on weight or metabolic parameters, it could be conceived that concomitant supplementation of L-carnitine and synbiotics may confer more pronounced impacts on these indicators, potentially through simultaneous modulation of energy homeostasis (8, 30), increasing fatty acid oxidation (8, 30), reducing adipogenesis or stimulating adipocyte lipolysis (21, 30), alleviating insulin resistance and glucose homeostasis (10, 31, 33), or attenuating systemic inflammation (56, 57), in a complementary or synergistic manner probably mediated through concurrent targeting of metabolic/inflammatory signaling pathways including CPT-Ia (20, 21), PDHC (8, 19), PPAR- (21, 31, 37), AMPK (30, 37), or NF-B (31, 34)
