does l carnitine help muscle growth L-Carnitine Tartrate 1500mg - Fat Burner, Weight Loss, Gain -L- All You Need To Know
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Laksmi PW, Setiati S, Tamin TZ, et al

Clinical evidence: The SURMOUNT-1 trial, published in the New England Journal of Medicine , showed that participants on the highest dose of tirzepatide (15 mg) lost an average of 22.5 percent of their body weight over 72 weeks the most weight loss ever demonstrated by a pharmaceutical agent in a clinical trial (Jastreboff et al., 2022)

J Proteome Res 16(3):13151326 Katt WP, Ramachandran S, Erickson JW, Cerione RA (2012) Dibenzophenanthridines as inhibitors of glutaminase C and cancer cell proliferation

It seems you may need high B12 supplementation and to stop any folate supplements for a while