Latest research (as in only ~2m old) dispels that narrative a bit but not entirely. Looks like spermidine is the autophagy signal but they’re not sure fasting does t always increase spermidine
Also…lifting light weights for like 10 minutes a day at home is a lifechanger in the early days
Early days as in the first ~4 months of the journey (which is lifelong…a formerly obese person will always be highly likely to regain the weight)
It’s a life changer because when you’re at a significant caloric deficit, your body sheds both fat and muscle. When you lose muscle, your metabolic rate drops, also lowering your rate of fat loss
If you lift even a little, your body will hang on to muscle more effectively, making it easier to lose and maintain weight over a longer period
Also…lifting light weights for like 10 minutes a day at home is a lifechanger in the early days