Poor diet and hair loss
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Eating the wrong foods
A healthy, balanced diet is the key to everything, including healthy hair. A diet that is not high enough in iron or protein can lead to hair loss, says Dr. Shapiro. Those with eating disorders and those who crash diet often experience hair loss. If poor diet is your issue, you can usually reverse hair loss by balancing your food intake. Good sources of protein include meat, eggs, fish, nuts, beans, and seeds; add iron to your diet with foods like lentils, green foods like spinach and other veggies, cereals fortified with iron, clams, and oysters.
The body uses vitamin A to help with vision and hair growth, however, high levels of vitamin A can have a converse effect and contribute to hair loss. Avoid taking excessive vitamin supplements that could cause a spike in your vitamin A. Certain medications can also be responsible for elevated vitamin A levels, particularly retinoids commonly used to treat acne and psoriasis. While you are taking retinoids there is not much you can do about hair loss, says Dr. Shapiro. However, once you stop medication or excessive supplements, your hair should resume its normal growth.
One other vitamin to pay attention to: vitamin D. Though studies are not conclusive, some research suggests that low levels of vitamin D and iron can cause thinning hair in women. Ask your doctor to test your vitamin D and iron levels, and discuss whether or not you should take a vitamin supplement.
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Hmm … feels like I've just read a whole lot of nothing. Sounds like too much of a good thing is bad, and too much of the bad stuff is really detrimental. So basically, it's all about moderation and finding the balance diet, which is the same kinda thing that every dietitian/nutritionist/doctor has been saying.