Sometimes thinning hair is a sign that you aren't getting the nutrients you need. Eating a well-balanced diet is a sure way to start growing thicker, healthier hair.  Make sure you get plenty of protein - eat fish, chicken, legumes, and lean meats.    {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a8\/Make-Garlic-Hummus-Step-1.jpg\/v4-459px-Make-Garlic-Hummus-Step-1.jpg","bigUrl":"\/images\/thumb\/a\/a8\/Make-Garlic-Hummus-Step-1.jpg\/aid1817875-v4-728px-Make-Garlic-Hummus-Step-1.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"485","licensing":"<div class=\"mw-parser-output\"><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/\">Creative Commons<\/a><br>\n<\/p><p><br \/>\n<\/p><\/div>"}  Omega-3 fatty acids are essential to hair health. Eat nuts, avocados, and olive oil.    {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/7\/79\/Care-for-Dry-Hair-Step-5.jpg\/v4-459px-Care-for-Dry-Hair-Step-5.jpg","bigUrl":"\/images\/thumb\/7\/79\/Care-for-Dry-Hair-Step-5.jpg\/aid1817875-v4-728px-Care-for-Dry-Hair-Step-5.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"485","licensing":"<div class=\"mw-parser-output\"><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/\">Creative Commons<\/a><br>\n<\/p><p><br \/>\n<\/p><\/div>"}  Vitamin B is also important when it comes to nourishing your hair. Make sure you eat plenty of fruits and vegetables. Biotin is another essential nutrient for hair growth, found particularly in seafood, eggs and soybeans.    {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/0\/0b\/Lose-5-Pounds-in-5-Days-Step-5.jpg\/v4-459px-Lose-5-Pounds-in-5-Days-Step-5.jpg","bigUrl":"\/images\/thumb\/0\/0b\/Lose-5-Pounds-in-5-Days-Step-5.jpg\/aid1817875-v4-728px-Lose-5-Pounds-in-5-Days-Step-5.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"485","licensing":"<div class=\"mw-parser-output\"><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/\">Creative Commons<\/a><br>\n<\/p><p><br \/>\n<\/p><\/div>"} You can buy supplements specifically designed to help you get the nutrients you need to grow thick hair. They usually contain biotin, fish oil, protein, and a range of vitamins. Prenatal vitamins are another good choice when your goal is growing thicker hair. Spending time in the sun, in the pool, and even on your morning commute may be affecting your hair if you aren't taking measures to protect it. Being more mindful of keeping your hair safe - the same way you would your skin - can lead to thicker hair in the long run.  Wear a hat when you'll be in the sun for long periods of time. This way your hair won't get dried out and brittle. Wear a swim cap in the pool, so the chlorine doesn't damage your hair. If chlorine does get on your hair, use a daily clarifying shampoo afterwards to remove it. Try not to spend too much time in polluted areas. If you have to walk next to traffic, wear a scarf or hat. Stress can be a cause of hair loss. Find ways to make your life calmer, and eventually you may find that your hair begins to grow in thicker.  Start meditating. You can't wish your problems away, but meditation helps you figure out how to handle them better.    {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/3\/39\/Feel-Refreshed-Step-5.jpg\/v4-460px-Feel-Refreshed-Step-5.jpg","bigUrl":"\/images\/thumb\/3\/39\/Feel-Refreshed-Step-5.jpg\/aid1817875-v4-728px-Feel-Refreshed-Step-5.jpg","smallWidth":460,"smallHeight":334,"bigWidth":"728","bigHeight":"529","licensing":"<div class=\"mw-parser-output\"><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/\">Creative Commons<\/a><br>\n<\/p><p><br \/>\n<\/p><\/div>"}  Get regular exercise. Keeping your body healthy helps destress the mind.    {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/1a\/Regulate-Your-Menstrual-Cycle-Step-4.jpg\/v4-459px-Regulate-Your-Menstrual-Cycle-Step-4.jpg","bigUrl":"\/images\/thumb\/1\/1a\/Regulate-Your-Menstrual-Cycle-Step-4.jpg\/aid1817875-v4-728px-Regulate-Your-Menstrual-Cycle-Step-4.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"485","licensing":"<div class=\"mw-parser-output\"><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/\">Creative Commons<\/a><br>\n<\/p><p><br \/>\n<\/p><\/div>"}  Get plenty of sleep. Sleeping for 8 hours a night is essential to your mental and physical health.    {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/bf\/Be-Confident-in-Your-Beauty-Step-23.jpg\/v4-459px-Be-Confident-in-Your-Beauty-Step-23.jpg","bigUrl":"\/images\/thumb\/b\/bf\/Be-Confident-in-Your-Beauty-Step-23.jpg\/aid1817875-v4-728px-Be-Confident-in-Your-Beauty-Step-23.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"485","licensing":"<div class=\"mw-parser-output\"><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/\">Creative Commons<\/a><br>\n<\/p><p><br \/>\n<\/p><\/div>"}

Summary:
Eat foods that make your hair grow thicker. Take supplements for thicker hair. Protect your hair from outside damage. Try to de-stress.