FAST40 Approved Lean Cuts of Steak 1. Sirloin – top sirloin is a go-to; lean, affordable, easy to find 2. Eye of Round – one of the leanest cuts in the whole store 3. Bottom Round – great for slow cooking 4. Top Round – solid lean option, often labeled “London Broil” 5. Flank Steak – lean and flavorful, just slice it thin 6. Skirt Steak – similar to flank, great for quick cooking 7. Tenderloin / Filet Mignon – naturally low in fat, the gold standard 8. Strip Loin (NY Strip) – leaner than ribeye, still satisfying 9. Tri-Tip – leaner than most, very versatile The FAST40 Rule of Thumb: Look for cuts with the word “round” or “loin” in the name, those are almost always your leanest options at any grocery store. Avoid ribeye and T-bone if fat loss is the priority, those are marbled heavily, which means more fat stored, and that works against turning on your fat furnace!