The key is to get more protein from high quality food sources like lean meats or plant protein rather than the high fat, processed variety. (personaltraining4u.net)
You want to ensure that you are getting more calories, but that those calories are coming from quality food sources that provide more than just calories, but nutritional value as well. (massgainsource.com)
That's the general principle of a clean diet, remove the sugar and the saturated fats, and replace them with quality food sources that reduce inflammation in your system. (detoxdiy.com)