Natural Factors Phosphatidyl Choline - This form of highly-purified lecithin has shown good results in improving brain functions, as it is essential in the production of certain neurotransmitters. Clinical tests have demonstrated Phosphatidyl Choline's ability to distinctly improve memory retention, and there are indications that it may be useful in controlling mood swings and help reduce some developmental problems in children. It has demonstrated the ability to prevent fat from accumulating in the liver, lower blood pressure and reduce cholesterol build-up.