Hair Loss

Is Intermittent Fasting Good or Bad for Hair Health?

When you are losing your hair, you may be desperate to try just about anything to grow it back.

One common path that many hair loss sufferers take is to overhaul their diet. That is certainly not a bad choice. The problem comes when you undertake “extreme” diets, without regard to physical or mental wellbeing.

Intermittent fasting is an eating pattern often considered to be an “extreme” diet. As this article will explain, though, you can do intermittent fasting in a healthy way.

What is Intermittent Fasting?

Intermittent fasting is an eating pattern wherein the individual cycles between periods of fasting and periods of eating. It is an eating pattern as opposed to a diet because it does not dictate what you eat, but instead when you eat.

While intermittent fasting has gained popularity in recent years, it is actually an ancient practice. It is most commonly associated with various religious practices and holidays (Ramadan, Good Friday, etc). Our earliest ancestors likely also practiced intermittent fasting during the hunting/gathering days.

There are two common schedules for intermittent fasting: 1) time-restricted feeding, and 2) alternate day fasting.

The first involves abstaining from food for a set number of hours in one 24-hour period.

Example implementations of this schedule include 18/6 (18-hour fasting window followed by a 6-hour eating window), 16/8 (16-hour fasting window followed by a 8-hour eating window), and 14/10 (14-hour fasting window followed by a 10-hour eating window).

The second schedule involves a limited caloric intake on day 1, followed by a day of regular caloric intake. There are some models that take this even further and recommend you consume no calories on day 1, and consume “regular” calories on day 2. You then repeat the cycle on an ongoing basis.

The Benefits of Intermittent Fasting

You may be wondering why people would deprive themselves of food on a regular basis. Well, research has found that intermittent fasting can provide many health benefits. Here is a look at some of the basics.

Autophagy

The human body is a marvelous system of complicated structures and complex processes. This includes its very own cleaning and regulation mechanism known as autophagy.

Cells do not live forever, and there are many components within the cell that can break down over time. This is where autophagy comes in.

Autophagy is the mechanism by which cells remove unnecessary or dysfunctional components from the cell. They do so by degrading and then consuming the matter with the help of lysosomes.

Intermittent fasting is a type of stressor and so activates a hormetic response. Hormetic response is an adaptive response to stress. It upgrades various cellular pathways and consequently improves health. It makes sense from an evolutionary perspective. If our ancestors were starving looking for food, the hormetic response improves our performance. This in turn increases our chances of finding food and surviving.

Fasting likely promotes cellular autophagy in various structures throughout the body (1). This includes the liver, brain, and muscles. Some researchers have also suggested that autophagy may play a role in the hair growth cycle, though we should take these claims with a grain of salt until further studies (2).

Hormone Balance

Hormones play a role in every system throughout the human body. They determine what cells and tissues will be acted upon, and they also determine what that action will be.

It makes sense, then, that hormonal imbalance can have serious consequences. And while it is certainly not a life-threatening effect, hormone imbalance can trigger hair loss.

Intermittent fasting has been shown to have an effect on hormone regulation (3). In particular, periods of fasting lower insulin levels, leptin, and ghrelin.

This does not mean that intermittent fasting is the answer to hormone imbalances as a whole. But it may be an additional tool to add to your arsenal (under the close supervision of your doctor) if you do suffer from imbalance.

Weight Loss

Intermittent fasting does not guarantee weight loss. If you have a few extra pounds to lose, though, then intermittent fasting can be a helpful tool in your weight loss journey.

Excess weight can cause a variety of health issues, including insulin sensitivity, high blood pressure, and high cholesterol. It can also put you at an increased risk for chronic conditions such as diabetes and heart disease.

While there is not a definitive link between obesity and hair loss, there are some factors (such as insulin sensitivity) that may be more likely in those who are overweight or obese. This may have to do with the link between pattern baldness and metabolic syndrome, though research on that matter is ongoing (4).

Can Intermittent Fasting Cause Hair Growth?

The short answer is no, intermittent fasting is not a surefire way to promote hair growth.

Intermittent fasting is an eating pattern that can provide an array of benefits as mentioned above. While a direct benefit of intermittent fasting is not hair growth, an increase in your overall health may contribute to scalp and hair health.

Intermittent fasting is thought to enable the body’s cells to repair themselves more efficiently. It can also help to regulate hormone levels which can play a major role in hair growth and balding.

If you suffer from pattern baldness, you should know that intermittent fasting is unlikely to produce significant results. It may contribute to your overall health, though, and that is an important step in the fight against scalp tension and DHT sensitivity.

Intermittent Fasting and Temporary Hair Loss

Whether you are following an intermittent fasting schedule for general health benefits, or as a way to potentially promote hair growth, you may be surprised by one temporary side effect: hair loss.

Intermittent fasting may cause a type of temporary hair loss known as telogen effluvium. This is a condition often triggered by a variety of external and internal factors.

Telogen effluvium is a hair loss condition characterized by an increase in hair shedding, loss of hair volume, and slow hair growth. It occurs when the hair growth cycle is interrupted, and the hair follicles are prematurely pushed into the telogen (resting) phase.

In general, this is nothing to worry about. This is especially true if you are undertaking a new eating pattern or diet plan, or otherwise changing your daily habits.

The key here is that telogen effluvium is temporary. If you experience an increase in shedding and hair loss for longer than eight weeks, it is time to speak with your doctor.

An increase in hair shedding caused by seasonal changes
Telogen effluvium is a form of temporary hair loss that extreme diets can sometimes trigger.

Potential Drawbacks

While there do seem to be benefits to intermittent fasting, it is not the right choice for everyone. There are some potential drawbacks to consider before you try it for yourself.

Extreme Caloric Deficit

If you are using intermittent fasting as a tool to help you lose weight, it is important to remain in a caloric deficit. To lose weight, you need to consume less calories than you expend.

You should still be sure you are eating enough based on your sex, age, and body type, and you can do so by maintaining a small deficit of anywhere from 250 calories to 500 calories per day (~0.5 to 1 pound of weight loss per week).

If you are already at a healthy weight, though, it is important to ensure you are consuming enough calories within your eating window.

One side effect of intermittent fasting is a decreased appetite. This means you may need to be more conscious of consuming a healthy caloric intake within your eating period.

IMPORTANT! If you have a history of eating disorders, it is best to speak with your doctor and/or therapist before you implement such an eating schedule. It is crucial that you are mindful of your mental health so as not to slip into old, unhealthy patterns.

Nutrient and Mineral Deficiency

One of the most common causes of nutrient and mineral deficiency is an extreme caloric deficit, which we discussed above. Essentially, if you are not eating enough calories to sustain your weight then it is unlikely you are able to fit in all of your nutrient needs.

You do not need to be at an extreme caloric deficit to suffer from poor nutrient intake, however. Even if you are eating enough calories within your feeding window, it is still possible to make poor dietary choices.

Remember, intermittent fasting is about when you eat. It has nothing to do with what you eat, so it is still up to you to ensure you are eating a varied, rich diet. A diet varied enough to contain the majority of your nutrient, vitamin, and mineral needs should contain:

  • Lean meats (e.g. chicken, turkey, pork, etc.)
  • White fish (e.g. cod, haddock, pollock, etc.)
  • Whole grains (e.g. oats, brown rice, quinoa, bulgur, etc.)
  • Leafy greens (e.g. broccoli, kale, spinach, collard greens, etc.)
  • Fruits (e.g. apples, oranges, berries, etc.)
  • Nuts and seeds (e.g. pumpkin seeds, sunflower seeds, almonds, etc.)
Naturally alkalising foods in a platter
Intake of green and brightly colored vegetables will protect against micronutrient deficiency.

If you are worried about nutrient deficiencies, make sure to speak with your doctor. A simple blood draw can alert your physician to any deficiencies which you can then treat with an improved diet or dietary supplements.

Intermittent Fasting Frequently Asked Questions

There is plenty of ‘mystery’ surrounding intermittent fasting. This section will answer some common questions about fasting, as well as its effects on hair growth.

Can I Drink Anything While Fasting?

It is not only allowed but highly encouraged!

You can consume zero-calorie beverages such as water, tea, and coffee during a fasting period. These can also help you to complete your fasting window with ease as water fills the stomach and coffee is an appetite suppressant (5).

Depending on how “strict” you are with your fasting, you may allow yourself a splash of milk or cream in your tea or coffee. A general rule of thumb is any beverage less than 50 calories will not break a fast. There is a lot of debate about this in the fasting community, though, so take this advice with a grain of salt.

Will Fasting Slow My Metabolism?

If you are using intermittent fasting as a weight loss tool, you may be worried that fasting will slow your metabolism. This can make it more difficult to lose weight in the long run. The good news, however, is that intermittent fasting does not slow your metabolism (6).

You may have heard of something called “starvation mode” where the body will do everything in its power to hold onto fat during periods of starvation. This has largely been proven false. Not to mention that intermittent fasting is not starvation, anyway, since you are still fulfilling your body’s daily caloric needs, just within a shorter period of time.

Can I Take Supplements In a Fasted State?

Vitamin and nutrient supplements can be an important addition to your daily routine. But will fasting impact when and how you can take them?

For the most part, intermittent fasting should not impact your body’s ability to absorb supplements. There is an exception to this rule, of course, and that is fat-soluble vitamins which you should best take with a meal.

So if you typically take your supplements during your new fasting window, then just shift them to another time in your day (preferably at one of your meal times). Then you will not need to worry at all about the potential for malabsorption.

Will I Notice a Change in My Hair if I Stop Intermittent Fasting?

Let us say you practice intermittent fasting for a few months and you decide it is not for you, so you return to your usual pattern of eating. Should you worry about hair shedding?

As mentioned above, intermittent fasting can sometimes trigger temporary hair loss/shedding. The temporary hair loss is triggered by a variety of factors, and changing up your eating habits can be one of them.

Does this mean you are bound to experience excessive shedding if you stop intermittent fasting? No. But if you do experience an increase in shedding for the first six to eight weeks following the change, this should not discourage you.

Conclusion

Intermittent fasting is a centuries’ old way of eating. If you want to give it a try and see the benefits for yourself, there are plenty of intermittent fasting methods to choose from.

You should keep in mind, though, that intermittent fasting is unlikely to produce significant hair growth results. It is not a bad idea, though, to use it in combination with other natural hair loss treatments. There is also nothing to stop you from combining it with FDA-approved hair loss treatments like minoxidil and finasteride.

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You can follow a few hair hygiene tips to make your hair less likely to fall out: Avoid hairstyles that pull on the hair - Avoid high-heat hair styling tools - Don't chemically treat or bleach your hair - Use a shampoo that's mild and suited for your hair - Use a soft brush made from natural fibers - Try low-level light therapy.

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