By EKalman June 20, 2025 - 4:56am

Hair loss isn’t just a problem for men—it also affects a lot of women. In many cases, it can feel confusing and even upsetting, especially when you're not sure why it’s happening. The truth is, there are several possible causes. Some are simple and easy to fix, while others may need medical attention. Once you understand the cause, you can take the right steps to manage or treat it.

Here are 11 possible reasons why women experience hair loss:

1. Not Getting Enough Protein
Your body needs protein to stay healthy, and your hair depends on it too. If you’re not eating enough protein, it can slow hair growth or even lead to hair loss. This kind of deficiency may also come with other symptoms like fatigue, swelling, skin issues, and muscle loss.

To make sure you’re getting enough protein, try to include foods like eggs, chicken, cottage cheese, milk, lean beef, lentils, fish, almonds, tuna, oats, and quinoa in your diet.

2. Hormonal Changes
Changes in hormone levels can affect hair growth. Pregnancy, starting or stopping birth control pills, and menopause can all lead to a type of hair loss called telogen effluvium. This usually causes noticeable thinning and is more likely if hair loss runs in your family.

If you think hormones may be the cause, speak with your doctor about treatment options or switching birth control methods.

3. Vitamin B12 Deficiency
Vitamin B12 helps your body make red blood cells and keeps your nervous system working well. If your body is low on B12, it could lead to symptoms like weakness, memory issues, fatigue, and yes, hair loss.

Foods rich in vitamin B12 include meat, dairy products, eggs, and fortified cereals. If you don’t eat these foods often, you might want to ask your doctor about supplements.

4. Lupus
Lupus is an autoimmune disease that causes the immune system to attack the body’s own tissues. It can cause a range of symptoms like joint pain, skin rashes, fatigue, and hair loss. Lupus needs medical treatment to prevent serious complications, so talk to your doctor if you think this might be affecting you.

5. Alopecia Areata
Alopecia areata is a condition that can result in complete hair loss. There is no cure for alopecia areata, but there are some treatments that provide hair regrowth, like hair transplant surgery. Doctors also recommend following an anti-inflammatory diet and managing chronic skin conditions.

6. Polycystic Ovary Syndrome (PCOS)
PCOS causes hormone imbalances that may lead to weight gain, irregular periods, acne, and hair loss. In some cases, women may also notice more facial or body hair due to high levels of male hormones.

Managing PCOS usually includes a healthy diet, regular exercise, and sometimes medication to balance hormones.

7. Aging
It’s common for women in their 50s and 60s to notice hair thinning. This type of hair loss is usually not linked to illness and often doesn’t need treatment. If it bothers you, cosmetic options like different hairstyles, wigs, or hair fibers can help cover thinning areas.

8. Too Much Vitamin A
While vitamins are important, having too much of some—like vitamin A—can actually cause hair to fall out. Adults should stick to no more than 5,000 IU of vitamin A daily. The good news is, once you stop taking too much, your hair will likely grow back.

9. Side Effects from Medication
Certain medications can cause hair loss. This includes birth control pills, antidepressants, blood thinners, anti-inflammatory drugs, and even some medications for high blood pressure. Chemotherapy, which targets fast-growing cancer cells, often causes full hair loss during treatment, though the hair usually grows back afterward.

If you suspect a medication is causing your hair to fall out, talk to your doctor about possible alternatives.

10. Anemia (Iron Deficiency)
Anemia happens when your body doesn’t have enough red blood cells, often due to low iron. This can lead to symptoms like tiredness, pale skin, shortness of breath, and hair thinning.

Iron-rich foods like red meat, spinach, lentils, and fortified cereals can help, and in some cases, iron supplements might be necessary.

11. Hypothyroidism (Underactive Thyroid)
Your thyroid gland controls many important functions in your body. When it doesn’t make enough hormones, it can lead to symptoms like weight gain, fatigue, depression, and hair loss.

Treatment usually includes thyroid hormone replacement therapy. Once your hormone levels are balanced, your hair often starts to grow back.