Let’s start here.
Before I start looking for a solution to their hair loss in a box from the drugstore or a pill bottle from a dermatologist, I encourage clients to look inside their health and body.
Grab the plethora of tips below!
Getting to the Root: Causes of Hair Loss
Sometimes hair loss is associated with a simple root cause. Most of the time, there are hormonal imbalances such as thyroid, insulin, or testosterone. Occasionally, hair loss is linked to physical and emotional trauma, and probably dysregulation of cortisol.
I’ve also found underlying health conditions such as autoimmunity as the root cause.
To find a particular reason for hair loss, most functional medicine practitioners order a blood panel to test several hormones and conditions.
Correcting hair loss is all about sussing out the cause. For example, some women make too little thyroid hormone to grow their hair – and the body is trying to heal, making it a lower priority than, say, keeping your body warm.
Other women make too much of the male hormone testosterone and that causes balding, although the main culprit is a metabolite (daughter) of testosterone called (DHT)
Here are the most common causes of hair loss:
1. Low thyroid
Rapid hair loss can be an early sign of a thyroid problem, often first diagnosed in the beauty salon. In addition to thinning and shedding, your hair can become coarse, dry, and easily tangled.This kind of general hair loss will slow and eventually stop once your hormone levels are stabilized. But sometimes the problem continues even after treatment, especially if you’re taking levothyroxine, a synthetic hormone often used to treat hypothyroidism. Excessive or prolonged hair loss is a known side effect of this drug. Look into this if you’re still losing hair despite what your doctor calls sufficient treatment.
Do this: Work with a functional medicine practitioner with experience treating thyroid conditions. Get a full thyroid blood panel (see below). Sometimes micronutrient deficiencies such as low selenium or zinc are a reason for faulty thyroid function, or you may have autoimmune thyroiditis (Hashimoto’s thyroiditis), which needs to be addressed with a full functional medicine protocol. Because changes in dose can trigger hair loss, low and slow is the goal with any medication. Some people find their hair loss diminishes if they take Thyrolar, a synthetic combination of both thyroid hormones, T4 and T3.
2. Low iron, low lysine
In one study, 90 percent of women with thinning hair were deficient in iron and the amino acid lysine.1 Lysine helps transport iron, which is essential for many metabolic processes.
Do this: Measure your ferritin levels, the most sensitive indicator of iron in the body. You need a minimum of 40 to grow new hair, and a healthy range is 70–80. Make sure you get your daily dose of iron from grass-fed red meat and greens. Good sources of lysine are foods rich in protein. Add lysine to your diet with foods rich in protein, such as meat and poultry, soy, eggs, cheese (especially Parmesan), and some fish (cod, sardines). If you need additional doses of an iron supplement, be sure to have a functional medicine practitioner track your ferritin so you don’t get too much and trigger iron overload.
3. Androgenic alopecia
This is the most common type of hair loss and affects 30 percent of women.2 The typical pattern for hereditary female-pattern hair loss, or androgenic alopecia, is a widening part or noticeable thinning of hair, particularly over the mid-frontal portion of the scalp.
Sometimes women with androgenic alopecia have polycystic ovary syndrome (PCOS). Typical signs and symptoms are ovarian cysts, irregular periods, weight gain, blood sugar problems, infertility, and hair loss. The problem may be exacerbated in some patients taking drugs for thyroid problems. Approximately 22 percent of women with PCOS have androgenic alopecia.3
The good news is that you can often stop and even reverse the symptoms of hair loss once you balance your hormones.
Do this: Run the full blood panel (see below). This is where evening primrose oil can help. Besides inhibiting DHT, the main culprit behind androgenic alopecia, evening primrose oil is a good source of essential fatty acids, and the symptoms of hypothyroidism are quite similar to those for insufficient essential fatty acids. See The Hormone Cure, chapter 9, for the full protocol. Berberine and inositol may be helpful to reset hormones. As always, I advocate a “food first” strategy along with taking targeted supplements. If changing your food and supplement plan doesn’t result in more hair on your head, then discuss with your functional medicine practitioner if minoxidil might be a good idea. (Minoxidil or Rogaine is approved for women for this type of hair loss and available over the counter.)
4. Not enough protein
If you don’t get enough protein in your diet, your body may enter famine mode and shut down your hair growth. This may occur about two to three months after a drop in protein intake.
Do this: Eat clean protein from fish, grass-fed meat, eggs, and quinoa. Read The Hormone Reset Diet, page 232, for a more complete list.
5. Excess vitamin A
Maybe you just started taking a new multivitamin or started on a supplement containing vitamin A. You may have driven your vitamin A levels too high, which may trigger hair loss.
Do this: Total intake of vitamin A should be no more than 5,000 International Units (IU) per day. When you remove excess vitamin A, your hair should grow normally again.
6. Stress hormones—from physical or emotional stress
Any kind of physical or emotional trauma can trigger telogen effluvium: surgery, weight loss, eating disorder, car accident, illness, troubled marriage, sick kid. Hair grows on a programmed cycle that involves a growth phase, rest phase, and shedding phase. Big emotional and/or physical stressors can cause the hair to lock down in the shedding phase.
Do this: If you clear the stress, the telogen effluvium usually clears in three to six months as your body recovers.
7. Fluctuating female hormones of pregnancy, perimenopause, going on/off birth control pills
This may also cause telogen effluvium, especially if you have a family history of hair loss.
Do this: Keep hormones as stable as possible by mitigating stress. In pregnancy, if you lose more hair postpartum than before you got pregnant, see your healthcare professional and run the blood panel (see below) to see if there’s an underlying thyroid and/or autoimmune condition.
Sadly, hair follicles can shrink in menopause, making the hair finer and more likely to shed. It’s called “miniaturization,” and it’s totally unfair. One study suggests that the ratio of estradiol-to-testosterone may influence hair loss in women and that low ratios may be the culprit in some cases.4
This ratio typically decreases during menopause. Not surprisingly, another study showed that women treated with bioidentical estradiol had less hair loss. 5
Do this: If you’re over forty, talk to your functional medicine practitioner about whether bioidentical estrogen may be right for you. You need to be followed by a gynecologist to make sure you stay safe and don’t develop side effects and adverse events, such as blood clots, endometrial cancer, stroke, breast cancer, heart disease.
9. Vitamin B deficiency
This can be exacerbated by stress or taking birth control pills, both of which deplete B vitamins in the body.
Do this: Between food intake and supplementation, you should be able to correct the problem. Rich sources of vitamin B include meat, fish, starchy vegetables, and some fruits.
10. Lack of fat
If you go low-fat in your food plan, you may consume fewer calories, nutrients, and more carbohydrates than your body requires. Most importantly, you may miss out on essential fatty acids, omega 3 and 6, which nourish the scalp and stabilize hair growth. The stress of restricting a macronutrient such as fat (or carbs or protein) may force more hair follicles to enter the telogen phase. Similar to the low thyroid state, your body gets the message to ration; there isn’t enough fuel to support the growth phase.
Do this: Maintain a balanced diet rich in “good” fats such as from coconut, avocado, and nuts—good for your hair and your health. Don’t skip out on macronutrients, but find the matching diet for your locks.
Sometimes the problem is alopecia areata, which appears as hair loss in round patches on the head, and sometimes the problem is autoimmune thyroiditis. Either way, the cause is an overactive immune system. The body misidentifies the hair as foreign and attacks it.
Do this: Work with a functional medicine clinician to reverse autoimmune thyroiditis. Consider starting an autoimmune protocol for food. In some cases, you may need to see a dermatologist for steroid injections.
Some medications such as beta-blockers, antidepressants, lithium, blood thinners, methotrexate, NSAIDs (such as ibuprofen) can cause hair loss.
Do this: If you’re taking one of these medications, talk to your medical professional about alternatives.
13. Overdoing hair care and products
Hair dye, frequent shampooing, other treatments, products, and vigorous styling can traumatize your hair follicles and lead to hair loss.
Do this: Wash your hair less often. The American Academy of Dermatology suggests that you let your hair air dry and limit hot devices (like flat irons and curling irons) to once per week or less. I know, I know, I love blowouts, too. Once per week, max!
14. Insulin resistance and blood sugar problems
Insulin, that helper hormone in charge of regulating blood sugar levels, also affects hair growth. Half of the female patients and 60 percent of male patients with androgenic alopecia have a constellation of signs and symptoms related to insulin resistance, blood sugar abnormalities, hypertension, and abnormal cholesterol.6 Another study found that androgenic alopecia may be an early marker of insulin resistance, metabolic syndrome, and cardiovascular disease in men.7 So it could be for women as well.
Do this: The good news is that cutting sugar and artificial sweeteners, being active, and losing weight can reverse insulin resistance and lower your chances of hair loss.
While the aging-related cause isn’t totally clear, it probably has to do with the hair follicle slowing down and getting depleted.
Do this: Well, we are all getting older. The key is your biological age as opposed to your chronological age. To learn more about an upcoming Ecourse on how to slow down aging and prevent hair loss, complete this quick questionnaire.
The blood panel I order
My advice is to try therapies aimed at the root cause of your hair loss first. Ask your doctor for my top blood tests, including these:
Complete blood count (a measure of whether you are anemic and your immune system is functioning)
Ferritin (the most sensitive test for iron stores in your body) – you may want to run a full iron panel
Thyroid-stimulating hormone (TSH), free T3, free T4, and possibly, reverse T3, thyroid peroxidase antibodies, anti-thyroglobulin antibodies
Cortisol, ideally free and metabolized in a 4-point measurement in the urine
Fasting insulin and glucose
Testosterone (I prefer total and free testosterone in women with hair loss)
Antinuclear antibody (tells you whether the hair loss is related to an autoimmune condition)
Bottom line: When it comes to your hair loss and prescription therapies, we want to re-proportion your hormones, not search and destroy. So I highly recommend that you get to the root of your hair loss by finding the cause. Work with a collaborative health professional. View hair loss as an important message from your body that needs to be decoded. Often when you heal your hair loss, you heal other systems in your body, such as your gut, immune system, and endocrine system.
Now it’s your turn.
Have you experienced significant hair loss?
Did you find the root cause?
What solutions worked for you?
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Additional Support and Proof!
Listen and learn to this video more from leading PHD's from the 12th Annual SSEW Symposium, “The Exposome & Metabolic Health.” Speakers discussed the role of social relationships, chemicals found in everyday items like beauty and hair care products, and our food environments in encouraging negative health outcomes such as obesity and diabetes, breast cancer, and even Alzheimer’s. Listen Here