As a nutrient which raises the metabolic rate probably faster than any other, lean protein is favored by bodybuilders for its fat burning properties. As well as encouraging muscle growth through its conversion into the amino acids needed to rebuild damaged tissues larger and stronger, protein, due to the complexity of its composition, requires additional energy to be properly digested. If we do not eat enough protein the body will break down muscle tissue to ensure there is enough of it to fuel the many biological processes that require it. So, to boost the metabolism to encourage fat burning it is essential that we at all times consume enough protein.
Grains get a bad rap when it comes to weight loss, but that's because refined grains (read: processed foods!) are linked to wider waists. 100% whole grains are bloat-busting superstars, however, as they're packed with minerals and de-puff by counter-balancing salt. Stick to brown rice, quinoa, wheat, barley, millet, farro, sorghum, and amaranth for the biggest benefits.
But in today's unenlightened "believe everything you hear" age this most effective and proven approach, for some strange reason, does not seem to attract much interest. This is no more obvious when one witnesses the "technological" revolution that is happening within the fitness industry, where a newer even more ridiculous gadget compared to the one that preceded it promises to build you the body of your dreams, with little effort on your part, "in 30 days or your money back"; where a machine that does most of the work for you is touted as a suitable replacement for actually applying a modicum of effort. https://www.youtube.com/watch?v=mDHGaU_jGrQ