In response to criticisms from the national taxpayer advocate and taxpayer representatives, the IRS expanded the National Standard miscellaneous allowance to include additional items.

FORBES: New IRS Offer In Compromise Policies

The American College of Sports Medicine recommends that endurance and strength training athletes consume higher levels of daily protein than the standard recommended daily allowance (i.e. 1.2-1.7 grams of protein for each kilogram of body weight, versus 0.8 grams per kilogram per day).

CNN: Could low iron, protein contribute to soreness after exercise?

Notice 2012-72 contains the standard mileage rates, the amount a taxpayer must use in calculating reductions to basis for depreciation taken under the business standard mileage rate, and the maximum standard automobile cost that a taxpayer may use in computing the allowance under a fixed and variable rate plan.

FORBES: 2013 IRS Mileage Rate Increases To 56.5 Cents Per Mile