Blackheads are... well, what is a blackhead verses a whitehead? A blackhead is a comedone that is exposed to the environment, so you get free radical damage and it turns black. So if you eat more foods rich in antioxidants, theoretically, you would minimize blackheads. The most effective way to minimize those blackheads that appear on your nose is to put a warm towel on your nose and gently squeeze them out. That's probably the best. Another is to have a mask. Certain masks will help to reduce that. Going to an esthetician and having a facial is going to help. There are many ways that you can do it. But at home the best is a warm washcloth and gently squeezing out those blackheads.