Not sure about supplements/pills, but
 Ditto on the veggies ... really, *any* orange veggie, so carrots, squash, sweet potatoes ...
 BUT Vitamin A is fat soluble and you *CAN* get too much of it (though it's hard). See http://ods.od.nih.gov/factsheets/VitaminA-HealthProfessional/ -- "Although hypervitaminosis A can be due to excessive dietary intakes, the condition is usually a result of consuming too much preformed vitamin A from supplements or therapeutic retinoids"
 And if you want an even larger dose than from carrots and the like? Liver! You'll be at several times the recommended daily amount just like that.
"Habe nun, ach! Philosophie, Juristerei und Medizin, Und leider auch Theologie Durchaus studiert ..." (Goethe, "Faust")
| current weight: 203.0