However, with proper protein intake (1.6-2.2g/kg/day) and resistance training 2-4 times weekly, you can preserve 90%+ of your muscle mass during weight loss
First, it provides direct anabolic effects that preserve and enhance muscle tissue
You do not always have to choose just one, as they can be taken together, but one might be a higher priority for you right now
10.3390/biomedicines13092067 77 ThomasC.JalilA.MagnaniC.IshibashiM.QuerR.BourgeoisT.et al (2018)
Delayed sleep onset is linked to decreased melatonin clearance, delayed melatonin peaks, increased melatonin levels during daytime and altered circadian variation of core body temperature
pubmed.ncbi.nlm.nih.gov, Onseng, Kittipong, et al