IIFYM??

IIFYM is not a website or a plan or whatever...it's simply a concept that avoids the demonization of certain foods, groups of foods, and macro nutrients. It was a concept coined on bodybuilding.com whereby people would post comments like, "can I eat oatmeal or will it ruin my gainz brah?"...to which the reply was, IIFYM (If It Fits Your Macros).

The concept has been well bastardized over time and was never intended to be an "eat whatever you want" kind of thing that it has basically turned into...the concept generally allowed for a smattering of "junk" so long as IIFYM while the bulk of the diet (noun) was nutrition driven, but still macro focused.

A typical and well balanced macro ratio for general purposes is 40c/30p/30f. There is no singular definitive macro ratio however...given that the concept was largely driven by fitness and namely bodybuilding, you will see a lot of macro ratios heavily favoring protein. However, an endurance athlete would need an entirely different macro ratio to optimize his or her performance.

TL/DR - IIFYM basically means to set up a reasonable macro ratio for your goals...hit those goals along with your calorie goals while primarily eating a lot of nutritious foods, but not the the extent of being fearful of certain food, food groups, or macro nutrients. In other words, eat a well balanced diet consisting of a variety of foods, hit your goals, rock your fitness, and win.

I though it meant If It Fits'in Yo Mouth.