Size Does Matter (to the Blood-Brain Barrier)
The great majority of so-called antioxidants are too large to pass through the blood-brain barrier (BBB). Anything bigger than 500 daltons (only 1/50 to 1/100 the size of most protein molecules) can’t get through the BBB – or the skin covering your body. A dalton (Da) isapproximately the mass of a single proton or neutron….