The single most common error in high-protein meal prep occurs before the chicken even touches heat. People routinely weigh their chicken breast raw, log it into an app under a "cooked" database entry, or weigh it cooked and log it under raw values. That simple discrepancy produces an immediate 25% tracking error.
Raw boneless chicken breast holds roughly 22 to 24 grams of protein per 100 grams (about 6.2 to 6.8 grams per ounce). The rest is predominantly water held within the cellular matrix of the bird. During cooking, thermal energy contracts the muscle fibers, expelling bound water into the pan or roasting tray. The protein molecules do not evaporate; they simply concentrate into a denser physical footprint.
If you purchase a standard family pack at the grocery store, plan for a 1.25x to 1.30x shrinkage multiplier. To yield a cooked 5.7-ounce portion (50g protein), you must place an 8-ounce raw breast into the pan. If you weigh the meat after cooking, select entries in your tracking software explicitly titled "chicken breast, cooked, skinless." If you weigh large batches while raw before batch-baking, divide the initial total raw weight by the number of prepared containers.
