neurodegenerative – adj. relating to or marked by degeneration of nervous tissue
degeneration – n. deterioration of a tissue or an organ in which its function is diminished or its structure is impaired
extract – n. a substance that you get from something by using a machine or chemicals
deposit – n. an amount of something (such as sand, snow, or mud) that has formed or been left on a surface or area over a period of time
Brewer’s yeast – n. a yeast used or suitable for use in brewing; also : the dried ground-up cells of such a yeast used as a source of the vitamin B complex
plaque – n. medical : a change in brain tissue that occurs in Alzheimer's disease : medical : a harmful material that can form in arteries and be a cause of heart disease
exposure – n. the fact or condition of being affected by something or experiencing something : the condition of being exposed to something
extract – v. to get (a substance) from something by the use of a machine or chemicals