Here is a link to the BoneLadies excellent blog where she compares the COMB and MOTS study which includes the melatonin listed by Catcando. I have always assumed that the melatonin makes a difference for the better with bone building because the body needs the quality of sleep to grow bone or maybe it is moot and the other supplements are what made the difference, impossible to tell in a combination study like this. But bone building is obviously a synergistic action of many supplements, hormones etc. so the study makes sense in mimicking real life.

The studies follow a novel combination of melatonin and other natural bone-aiding micronutrients including: strontium citrate, vitamins D3 and K2 etc. with each study having some difference in supplement. Obviously, this combination of supplements study has its pluses and minuses. Probably most importantly these are 2 studies on strontium citrate. A welcomed supplement study which is fairly rare in the research field.

Notice the links at the bottom of the blog link which will take you to the actual studies http://strontiumforbones.blogspot.com/2017/02/mots-and-comb-study-comparison.html