A friend suggested the Velocity Diet and Dan John did it.
I am almost 50 yo.
105 kg to 96kg. 6 weeks.
Used products available to us locally over here in Asia
We all used the mirror, had other people take pictures, and they, the gym, judged us accordingly.
Besides the true mirror difference, I felt great. Since then my eating habits have changed for the best, for me, after slowly introducing items back into my meals.
Now I am big on Protein, fats, greens, fruit, and nuts. The only daily starchy thing is rice since I am in Asia. Eat a whole pizza every other weekend, wings, Mexican and so on.
Right after the Vdiet I learned I hate peri-carbs. For some time I followed a well respected program, non-Tnation related, in use by many lifters and bodybuilders.. My body crashed all the time from the recommended carbs.
Another friend who owns a supplement business recommended BCAAS along with a few other over the counter ingredients for peri(pre,during, post) nutrition since I had no luck with the eating plan i followed after the vdiet. THe carbs did me in daily.
Went from a 3 day program to 5 days. Powerbuilding/strength type cycles.
Just Full of damn energy.
Now I am back up to 107kg with visible abs, but not a '6pack' after a year off the vdiet. the 6 pack was never a goal. Muscle and strength gains with some athleticism to keep up with all my kids.
The Vdiet was the key for me. It rid me of bad habits and cleaned my out. Learned so much about myself.
Read Issuance of Insanity 3: Nutritional Psycho by Jamie Lewis. The Ebook is almost 300 pages and is full of great info.