For long, it has been known that TNF- is the most prominent among them [34, 35], and some authors have reported that TNF- is able to induce muscle protein loss [36, 37] and skeletal myocyte apoptosis both in vivo and in vitro [38, 39]
Ann N Y Acad Sci 939:162178 Calabrese V, Ravagna A, Colombrita C, Scapagnini G, Guagliano E, Calvani M, Butterfield DA, Giuffrida Stella AM (2005) Acetylcarnitine induces heme oxygenase in rat astrocytes and protects against oxidative stress: involvement of the transcription factor Nrf2
Another review of 10 studies published in Frontiers in Nutrition in 2021 concluded that L-Carnitine has a potential but modest effect on weight loss in patients with type 2 diabetes
Carnitine assists in fat metabolism and plays an essential role in making fatty acids available for muscle tissue.* Carnitine also supports heart health.*

Brain Connect 13:164173 Su Y, Yuan D, Chen DG, Ng RH, Wang K, Choi J, Li S, Hong S, Zhang R, Xie J, Kornilov SA, Scherler K, Pavlovitch-Bedzyk AJ, Dong S, Lausted C, Lee I, Fallen S, Dai CL, Baloni P, Smith B, Duvvuri VR, Anderson KG, Li J, Yang F, Duncombe CJ, McCulloch DJ, Rostomily C, Troisch P, Zhou J, Mackay S, DeGottardi Q, May DH, Taniguchi R, Gittelman RM, Klinger M, Snyder TM, Roper R, Wojciechowska G, Murray K, Edmark R, Evans S, Jones L, Zhou Y, Rowen L, Liu R, Chour W, Algren HA, Berrington WR, Wallick JA, Cochran RA, Micikas ME, Unit IS-SC-B, Wrin T, Petropoulos CJ, Cole HR, Fischer TD, Wei W, Hoon DSB, Price ND, Subramanian N, Hill JA, Hadlock J, Magis AT, Ribas A, Lanier LL, Boyd SD, Bluestone JA, Chu H, Hood L, Gottardo R, Greenberg PD, Davis MM, Goldman JD, Heath JR (2022) Multiple early factors anticipate post-acute Covid-19 sequelae
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