Explainers
Plain-language deep dives for public audiences
How Your Brain Cleans Itself: The Glymphatic System Explained
Your brain operates a continuous waste-removal system called the glymphatic system, which uses cerebrospinal fluid guided by specialized astrocyte cells…
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Why creatine works in muscle but not the brain—yet
Creatine supplementation raises muscle creatine by 20–50% in days, but brain creatine increases by only 4% due to the blood–brain…
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How a single stem cell in bone marrow generates your entire immune system
All blood and immune cells originate from a single pluripotent hematopoietic stem cell in bone…
How amino acids shape brain function: neurotransmitters, energy, and cognitive resilience
Amino acids are the precursors to neurotransmitters and metabolic substrates for brain energy. Tryptophan produces…
How Coffee and Tea Reduce Iron Absorption: A Mechanism Explained
Polyphenols in coffee and tea bind non-heme iron in the gut, reducing absorption by 50…
Why the ‘2pm coffee cutoff’ is a myth: genetics and lifestyle create a 15-fold range in caffeine metabolism
A new systematic review reveals that caffeine half-life varies 15- to 40-fold across healthy adults,…
Resistant Starch and Gut Health: Why Fiber Type Matters More Than You Think
Resistant starch works through a specific bacterial fermentation pathway that other fibers do not, requiring…