Very old news. The medical establishment is so far behind the nutritionists it's pathetic. For even better results, add the amino acids LUTEIN (no, Paul Harvey fans, it does NOT have to be the "Flora-Glo Lutein" his Hi-Health pills contain), taurine and glutathione. THEN we can add the anti-oxidants pycnogenol and/or grape seed extract and the herbs eyebright and bilberry.
Remember, most MDs, especially those trained in American med schools, have had NO MORE THAN 5 HOURS OF NUTRITION CLASSES IF ANY AT ALL, yet they are totally at the mercy of the pharamaceutical industry which bombards them with tons of literature and dozens of presentations every year. So do your nutrition research ELSEWHERE. Caveat emptor!
BTW, smokers CANNOT convert much beta carotene into vitamin A, if any at all.
Sorry I'm grumpy; I can't seem to sleep.
"I can't seem to sleep."
Did you try melatonin? It works well for some people.