Summary: Elevated levels of PHGDH in the blood could signal the earliest stages of Alzheimer’s disease. Researchers caution older adults against using “brain-boosting” supplements that contain serine due to its link to PHGDH. As PHGDH is a key enzyme in serine production, elevated PHGDH levels result in increased serine levels in the brain.
Elevated levels of an enzyme called PHGDH in the blood of older adults could be an early warning sign of Alzheimer’s disease, and a study led by the University of California San Diego provides new evidence to support this claim.
In analyzing brain tissue, researchers