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However, the postprandial variations observed in triglycerides, total cholesterol, and HDL-C remained below the biological variation across all fasting durations

doi: 10.1371/journal.pone.0102568
Brain Behav Immun

A 2021 study demonstrated that exogenous MOTS-c could have the same performance-enhancing effect

In line with our findings, other publications have reported that UCP1 and PGC1 expression is increased in the BAT of ATF4-whole body knockout mice, suggesting that ATF4 can act as a negative regulator of uncoupled respiration (Wang et al, 2010)