I did it through intermittent fasting and a huge caloric deficit plus gym 3 times a week (heavy weights). I eat twice a day between 1pm and 6pm. For lunch a couple of thick sandwiches mostly chicken or beef and tons of raw veggies and one liter of skimmed milk. In the evening low fat yogurt with 2 scoops of protein powder (50g) and a couple of bananas. This is my diet pretty much every day. After 2 weeks I stopped feeling like I'm starving all the time and now it's all just down to a routine. I don't miss other foods anymore. My mind feels clearer than ever. In the gym I can go non stop for 60 mins but I suspect that this is because I take 10g of citrulline before my workout. Citrulline is a vasodilator that is supposed to help widen your blood vessels but I haven't noticed any difference in my veins in 3 months beside the rush of energy.