13 Common Causes of Hair Loss and What to Do About It

Hair loss can be an unpleasant experience for many people. Most people want a full, healthy head of hair and dread balding, bald spots, and thinning hair.

Let’s face it, cosmetic health matters. Our skin, nails, and hair are seen by the world, and they play a role in our social interactions and how we relate to others.

So what causes hair loss? And is there anything you can do to stop hair loss and promote hair growth? First, we’ll go through the reasons that hair loss could be occurring and then we’ll show you the options you have to keep your hair healthy.

Common Causes of Hair Loss

1. Hypothyroidism (Your Thyroid Isn’t Working Up to Speed)

“Hypothyroidism is a common and well recognized cause of diffuse hair loss,” say researchers 1.

When the thyroid isn’t pumping out enough thyroid hormone, hair doesn’t grow as it should. The thyroid determines how fast the metabolic processes of the body take place, and hair is not excluded from the thyroid’s action because hair follicles have thyroid hormone receptors that affect growth 2.

For many people, their thyroids aren’t working up to speed. Thyroid experts suggest that environmental pollutants play a big role in dampening thyroid activity 3. So if you are experiencing hair loss, get your hormone levels checked.

2. Zinc Deficiency

A lack of the mineral zinc is associated with hair loss, and sometimes patients need to supplement with zinc in order for their thyroid medication to effectively promote hair growth 1. Also, zinc and the thyroid’s metabolism are interconnected, and there has been evidence that zinc supplementation can improve thyroid function 1.

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3. Lack of Blood Flow

Hair needs blood to grow! Blood carries many nutrients and hormones that hair needs to grow thick and long. One study showed that scalp massage increased hair thickness, and researchers thought that improved circulation to the scalp was responsible for this hair-promoting effect 4.

In a study conducted in 1989, researchers confirmed that early male baldness was associated with reduced blood flow to the scalp 5.

4. Too Much DHT Hormone

Androgenetic alopecia is the most common cause of hair loss. It is a genetic condition by which too much DHT, an especially potent form of testosterone, is made in the scalp. DHT causes the loss of hair by inhibiting hair growth and shortening the hair growth cycle so that more hair is shed than replaced 6.

This condition is very common. For instance, 25% of men have some form of balding by age 30, and 65% have some balding by age 60.

5. Stress

Researchers describe numerous cases of scientific literature that indicate stress may trigger hair loss 7. Research has indicated that activation of the stress response may cause the death of hair follicles and stop the replication of cells that generate the proteins that make up hair 7.

Numerous indications show that the immune system, when stirred into disorder by stress, can attack your hair and the cells that produce hair 7.

6. Too Much Vitamin A

This is a rarer cause, but if you are supplementing with vitamin A and getting too much, you could experience hair loss. Always be careful when supplementing with fat-soluble vitamins, like vitamins A and E.

7. You Are Not Eating Enough Protein

This is rare in first world countries, but if you are on a very low protein diet, it could be diminishing your hair growth. Protein is necessary for hair synthesis.

8. Selenium Deficiency

Selenium is important for protecting hair from oxidative stress, and a selenium deficiency has been evidenced to cause hair loss 8. You can get this mineral from Brazil nuts, meats like turkey and chicken, and some beans.

9. Vitamin D Deficiency

Vitamin D is important for health in a variety of ways, and some evidence even shows that it impacts hair growth. Animal studies have shown hair loss due to vitamin D deficiency, as well as vitamin D activity and vitamin D receptors in hair 8.

10. Oxidative Stress

oxidative stress

Oxidative stress, caused by free radicals, can cause hair loss 8. If there are many potential causes of oxidative stress, it means that there are too many damaging free radicals for the antioxidants in your body to neutralize. Free radicals can damage your hair just like any other part of your body. A diet filled with colorful fruits and veggies along with whole grains and nuts provides the foundation for your body’s antioxidant defenses.

11. Birth Control Pills

These pills can hormonally interfere with hair growth and excessively activate DHT, exacerbating the most common cause of hair loss – androgenetic alopecia 9.

12. Anemia

If you are iron deficient, you might have trouble growing hair 10. The most common causes of anemia are malabsorption in the intestines or excessive bleeding 10.

13. Autoimmunity


Alopecia areata refers your own hair follicles being attacked by your own immune system. A healthy immune system is not supposed to do this, but many factors can contribute to this dysfunction. Even nutrient deficiencies and environmental pollutants might play roles in triggering autoimmunity.

Is There Anything You Can Do to Stop Hair Loss?

Seeing more hair in your shower drain or on your hairbrush than on your head? Concerned about hair loss or thinning hair?

You don’t have to suffer in silence. Fight back by giving your hair and scalp the nutrition it craves -- naturally!

Most hair loss remedies concentrate on the hair itself, but true nutrition comes from within!

Click here to discover a dozen different foods that not only help manage DHT, the underlying cause of hair growth, but also help ensure that every strand of new hair you grow is thicker, stronger and more luxurious than before.

Evan Burns

MSC in Nutrition

Evan Burns

MSC in Nutrition

Evan has years of experience researching and writing about the health effects of food and nutritional supplements.

He is especially passionate about nutritional pharmacology and the bioavailability, efficacy, and actions of supplements. He wants to spread knowledge about how effective diet and supplements can be at treating ailments and promoting well-being.

You try to eat right and follow a healthy lifestyle, but your hair keeps thinning. At this point, you’ve pretty much resigned yourself to baldness. Since hair loss runs in the family, all you feel you can really do is invest in ball caps and roll your eyes as yet another joke is made about your thinning hair or bald spot.

But the good news is that hair loss, even if it runs in your family, can be reversed! The secret is in the PINK method -- a proven, four-pronged strategy of not only helping to reduce the rate at which hair is lost, but also help strengthen new hair, so that every strand grows back thicker and fuller than before..

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