Is there a link between MS and Alzheimer’s (AD)

Multiple Sclerosis (MS) and Alzheimer’s disease (AD) are distinct conditions—one is an autoimmune disease, and the other is a neurodegenerative disease. However, research suggests they are biologically and clinically related: [1, 2, 3, 4]

Opposite Hallmark Pathologies: Recent studies show that MS patients are actually about \(50\%\) less likely to develop amyloid-beta plaques (a key Alzheimer’s marker) than individuals without MS. The underlying biology of MS may offer some protection against these specific Alzheimer-related protein buildups. [1, 2, 3]

• Shared Biological Mechanisms: Both diseases involve chronic neuroinflammation, blood-brain barrier dysfunction, and progressive cognitive decline. [1, 2, 3]
• Overlapping Cognitive Symptoms: Because both conditions can cause severe memory loss and slowed thinking, it can sometimes be difficult to distinguish between the two. However, MS patients usually retain better orientation to time and place than Alzheimer’s patients. [1, 2, 3]
• Co-occurrence: It is possible for an individual to develop both conditions. As MS patients live longer due to improved treatments, age-related diseases like Alzheimer’s are increasingly being diagnosed in this population. [1, 2, 3]

For a deeper look into current findings, you can explore the National MS Society research summary. [1, 2]