Phosphatidylcholine (PC) is one of the most important nutrients to consume daily for optimal health. PC is found in nuts, seeds, dandelion greens, egg yolks, liver, and certain seafood: foods that we consume too little of to obtain an optimal PC intake. Most adults do not get enough of this precious nutrient. Phosphatidylcholine (PC) is the basic building block of the membranes of every cell in the body. Without PC, cells age faster and do not function optimally. PC also helps promote healthy fat metabolism by emulsifying fats.