The Ageless Brain: Dr. Dale Bredesen on Preventing Cognitive Decline

In this episode, Dr. Kate Kresge sits down with neurologist and researcher Dr. Dale Bredesen to ask a hopeful question: what if cognitive decline could be caught years before symptoms, while it's still easiest to change? Dr. Bredesen walks through the "cognoscopy," his name for a brain health screen that pairs blood biomarkers like p-tau217, GFAP, and NfL with a brief cognitive assessment and, when symptoms are present, MRI volumetrics. He explains how inflammation, energy shortfalls such as insulin resistance, and toxic exposures can shift the brain from "connection" into "protection" mode, and why testing helps you decide what to address first. If you have a brain, this one's for you.

3 Key Takeaways

• Cognitive change starts long before a diagnosis. (Jack 2024) Dr. Bredesen describes four stages: asymptomatic, subjective cognitive impairment, mild cognitive impairment, and dementia. Earlier evaluation leaves more room to change course. (Livingston 2024)
• Blood biomarkers now offer a window into the brain. Plasma p-tau217 accurately distinguished Alzheimer's disease from other neurodegenerative disorders across three cohorts. (Palmqvist 2020)
• Personalized, multi-factor care shows promise. In a 25-patient single-arm pilot, a precision medicine protocol targeting each person's contributors was associated with significant gains in MoCA scores and cognitive indices. (Toups 2022)

Guest: Dr. Dale Bredesen is a neurologist, researcher, and author of The End of Alzheimer's and The Ageless Brain. After 30 years studying the molecular biology of neurodegeneration, including at UCLA and the Buck Institute for Research on Aging, he developed a precision medicine approach to cognitive decline that he and his team have taught to more than 2,000 physicians.

Clinical FAQ

What's included in a cognoscopy?

Dr. Bredesen describes blood tests for brain status (p-tau217, GFAP, NfL) and risk factors (such as hs-CRP, homocysteine, fasting insulin, and APOE status), an online cognitive assessment, and MRI with volumetrics for people with symptoms.

Why check homocysteine?

In older adults with mild cognitive impairment, homocysteine-lowering B vitamins slowed the rate of brain atrophy, especially in those with higher baseline levels. (Smith 2010)

How is oral health linked to brain health?

Porphyromonas gingivalis, a keystone bacterium in periodontitis, and its gingipain enzymes have been identified in Alzheimer's brain tissue. (Dominy 2019) Dr. Bredesen includes oral and sinus health in his workup.

Timestamps

00:00 – Intro: cognitive decline as preventable

02:29 – The Ageless Brain and why it's for everyone

14:34 – The four stages of cognitive decline

18:49 – What a cognoscopy includes

21:16 – p-tau217, GFAP, and NfL

29:45 – Seven fundamentals: diet, exercise, sleep, stress, brain training, detox, supplements

36:29 – The brain microbiome and oral health

46:15 – APOE4, inflammation, and toxin-driven patterns

51:17 – Why testing comes first

56:46 – What the brain scan panel includes

59:26 – Where to find Dr. Bredesen

Ready to elevate your practice? This episode is sponsored by Fullscript, a comprehensive care delivery platform designed to support whole-person, integrative healthcare. Fullscript helps clinicians bring supplement dispensing, lab ordering, and patient education into one centralized workflow. For more practitioner education on supplements, nutrition, and evidence-informed clinical care, visit Fullscript Academy at academy.fullscript.com.

Disclaimer: The views expressed on this podcast are those of the hosts and guests and don’t necessarily reflect those of Fullscript or any affiliated organizations. This podcast is for informational and educational purposes only and is not intended to be medical advice. For your safety, always check with your doctor or healthcare provider before making changes to your health routine.