Anthocyanins

Anthocyanins are absorbed quickly and excreted quickly as well, so changes in flow-mediated dilation and oxidative markers are more often seen only after several weeks of continued use. For people with swollen legs from sitting or cold extremities, this berry pigment fits microcirculation nutrition; how it feels often shows up as lighter lower limbs and warmer hands and feet.

Some trials watch fatigue after visual work, contrast sensitivity, and night-vision scales; the mechanism leans toward retinal microcirculation and antioxidant effects. For people who stare at screens for long periods or whose eyes feel dry and sore in the evening, changes in visual comfort are more often noticeable after several weeks of continued use.

Anthocyanins cross into skin from vessels, quenching UV-triggered free radicals and stabilizing microvasculature. Blueberries, black currants, and purple sweet potato are sources; people who flush easily after sun or look dull often match gaps on this skin-circulation antioxidant path, alongside eye-fatigue uses.