Pycnogenol is also known as pine bark extract on most skin care product in it liquid form but it is mostly called Pycnogenol in oral form and it is a very powerful antioxidant that helps to cleanse the body. Pycnogenol is very rich in essential nutrient that the body need to detoxify and get rid of infections and diseases. Pycnogenol can be used to treat hyperpigmentation issues like brown spots, acne scars, melasma scars and scars from PIH or chemical burn. Pycnogenol works by getting rid of the disease that causes the appearance of the brown spots. Pycnogenol is most effective on brown spots that are caused as a result of bacterial infections. Side Effects Of Pycogenol It can cause seizures. It can cause bloody stools. It can cause hormonal disorder. It can cause digestive issues. It can disrupt the normal hormonal production level.