Prof. Giorgi Pkhakadze
Why the same bread raises blood sugar differently in different people
Researchers at the Weizmann Institute found that identical carbohydrate meals produce glucose responses varying more than fivefold between individuals. Microbiome…
Vitamin D dose response is not linear: Why shelf-picked supplements may not work as expected
Vitamin D supplements do not work the same way for everyone. Research shows that doubling your dose does not double…
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 marrow. Cytokine signals like IL-3,…
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 serotonin; tyrosine produces dopamine; glutamine…
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 to 90%. Vitamin C counteracts…
Eggs and Alzheimer’s risk: New evidence from a 15-year study challenges decades of dietary caution
A 15-year study of 39,498 older adults found that eating eggs five or more times per week was associated with…
Sleep loss triggers simultaneous damage across seven body systems, new evidence shows
Controlled studies show that restricting sleep to 4–6 hours per night for one week triggers coordinated metabolic damage across seven…
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, making the popular '2pm cutoff'…