I came across this information recently that will benefit everyone starting on their new years diet.
Unfortunately, people lose muscle when they try to lose weight, which leads to decreased strength, impaired mobility and premature death. The challenge is how to help people attain a healthy weight without losing muscle.
A 13 week study of 80 obese older adults by Dutch scientists found that people fed a supplement containing whey protein, leucine and vitamin D maintained lean muscle during weight loss, compared to a control group. Both groups participated in a weight training program.
So preserve your muscle while dieting by using a combination of Protein, leucine and vitamin D. (American Journal of Clinical Nutrition, 101; 279 - 286, 2015)