1 USPS Tracking when purchased online will cost $0.36 in 2015, compared to $0.23 in 2014. 2  Postage for First Class Mail International Letters (1 oz.) and postcards will increase by five cents from $1.15 to $1.20. 3  First Class Package International Service will see an increase of 7.2% in 2015. The discounted âMetered Mailâ category for First Class Mail Letters (1 oz.), which includes online postage providers and postage meters, will increase from $0.48 to $0.485 in 2015. 2  First Class Flats (1 oz.) will stay the same at $0.98 in 2015. 3  Each additional ounce will cost $0.22 (up one cent from 2014).
Phenylalanine is an essential amino acid and it is found in nearly all foods which contain protein: meat (of all kinds), dairy products, nuts, beans, tofu... the list goes on and on.
Phenylalanine is found naturally in the breast milk of mammals. It is used in the manufacture of food and drink products and sold as a nutritional supplement for its reputed analgesic and antidepressant effects. It is a direct precursor to the neuromodulator phenethylamine, a commonly used dietary supplement.