7 Things I'm Doing Right Now to Slow Cognitive Decline (Cardiologist)


Your brain is about three pounds — and it burns roughly 20% of the energy you use every day. When that energy system stops working well, the trouble starts long before you notice a missing name.

In this Biblical Prescription for Life, cardiologist Dr. James Marcum walks through seven things you can start doing today to slow cognitive decline and support your brain against dementia and Alzheimer's disease.

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He starts with why he's not focused on the medications. The monoclonal antibodies aimed at clearing amyloid, the cholinesterase inhibitors, the NMDA antagonists — they've been around for years, they carry side effects, and dementia rates keep climbing. The more recent research has moved somewhere else entirely: the metabolic health of the brain. How well insulin moves sugar into your neurons. How well blood moves through the endothelium — the same blood vessel lining we talk about constantly here on Heartwise.

The seven things Dr. Marcum covers:

Walking and movement — 10,000 steps a day, or at minimum get up and move every hour
Resistance training — squats, push-ups, light weights; it improves insulin's ability to get fuel into your cells
Get outdoors — early morning sunshine for vitamin D and for setting your circadian rhythm
Sleep quality — the glymphatic system clears waste, including beta amyloid, while you rest. A single bad night raises amyloid production
Avoid toxins — alcohol, cigarettes, drugs, certain medications, pesticides, phthalates, and uncontrolled high blood pressure
Social stimulation — real people, real conversation, real games. Television is not a substitute
Avoid deficiencies — water first, then vitamin D, magnesium, CoQ10, omega-3s

And before all seven, the input that matters most: "The entirety of Your word is truth, and every one of Your righteous judgments endures forever." — Psalm 119:160

Permanent healing comes from your relationship with God. Everything else on this list is stewardship of what He gave you.

That's the heart of Dr.

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