In one sentence, describe what the following article is about:

Your diet and other health habits have a big effect on the texture of your hair. When you eat plenty of protein, nutrients, and healthy fats, your hair looks shiny and healthy. When you don't, your hair is the first place it shows. Watch and see how your hair improves when you do the following:  Eat food that contains protein, omega-3 fatty acids, and iron. Salmon, sardines, avocados, nuts, and flaxseeds are all excellent for promoting healthy hair growth. Stay hydrated by drinking plenty of water. When you're dehydrated, your hair can end up getting dry and brittle. Avoid smoking cigarettes. Smoke damage can make hair look dull and dried out. Ingredients in your shampoo and conditioner may be making your hair look dry and dull instead of silky and shiny. Switch to all-natural shampoos and conditioners that nourish your hair instead of stripping its gleam and weighing it down. Here's what to use:  Choose sulfate-free shampoo. Sulfates are harsh cleansers used in everything from dish soap to laundry detergent, and people are starting to realize they're not very good for hair. Look for shampoos that say "sulfate-free" and are made with natural cleansers. Sulfate-free shampoos are also good for those with curly and wavy hair, because they help prevent frizz. Choose a silicone-free conditioner. Silicons are added to conditioner because they make hair look shiny and smooth after the first few applications. Unfortunately, over time they build up in your hair and cause it to look weighed-down and dull. You're better off with silicone-free options. Besides feeling great, massage promotes good circulation in the scalp, which helps your hair grow faster and stronger. Do a scalp massage every day, or at least every time you take a shower. Just place your fingers on your scalp and rub it using a gentle circular motion.  To enhance your massage, try using coconut oil, almond oil, or jojoba oil. This is especially beneficial if you're worried about thinning hair. Tea tree oil, lavender oil or cedar wood oil are also healthy for hair. Trim off your split ends regularly to keep your hair in the best of health. Getting regular trims will also make your hair look shinier in appearance, since you're removing the dull, damaged parts. Choose a cut that brings out the best in your hair, and get your locks trimmed every 6-8 weeks.

Summary:
Be healthy from the inside out. Use natural hair products. Massage your scalp to promote hair growth. Get regular trims.