Getting rid of curls at end

Hey guys, I am a 15 year old guy with thick blonde hair. My hair is totally straight and normal, until it gets to a bout 3 to 4 inches. The only place it is this long is in the front, where about an inch away from the end it starts to curve to the side and face outwards and even upwards in some cases, and I was trying to get it to go over my eyebrows but to do that it would look a little weird if it curled up a bunch, plus it would already be long enough if it was straight. I have not tried straightening irons because nobody in my house has one. I might also add that in about a week I may be coloring my hair darker (not black but dark brown that is close to it), and I am coloring it with a professional hair colorer who has done it to me before but a diff color and it was shorter and a long time ago so my hair has recovered from that. What are my options for getting these ends of my hair to be straight, my hair is also thick so it is hard to work with these ends. Also what would be your recommendation to make my hair healtier, finer and more manageable (shampoos, conditioners, vitamins). Thanks in Advance!

I would buy a straightening iron. Since you don't have much curl it would probably be the easiest way to take care of it. You can get them pretty cheap at the drug store or walmart usually.

It won't make your hair healthier, as heat will damage it, but if you're going to keep the style like the guy in the photo it shouldn't matter. This is a fairly short style so your hair should be able to take that much since it will be growing out and getting cut off fairly quickly.

As far as hair health, you should just make sure you eat right, drink lots of water, and take a multivitamin a day. Don't take any more vitamins than that because if you take too much of some things, it can cause hair loss.

For healthy hair, it's best to avoid shampoos and conditioners with sulfates or silicones in them (anything in the ingredients with the word sulfate or words ending in "cone"). This, again, is a fairly short hairstyle, so I don't think it matters too much which shampoos and conditioners you use because you will keep getting it cut into this style and your ends will get cut off pretty quickly.