· PER is a measurement of a protein’s ability to increase body weight. FDA standard for PER value is 2.5. The higher the PER, the greater the ability to increase body weight. Appeton Weight Gain has a high PER value of 3.1. · With Appeton Weight Gain, it is a gradual weight gain without any side effects! It is important to take time to put on weight so that your body can adjust progressively. Not responsible with your country’s customs, please check with your country’s customs before you buy. Also allow some time for your country's customs clearance time, because the delays usually come from Customs Our customer service representative works on 24/7 basis. Your satisfaction is of utmost importance to us.
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