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Hair Growth Vitamins That Actually Work to Boost Hair Growth & Volume

Are you having issues with your hair?

Is your hair growing slowly, falling out, or not as thick or dense as it once was?

I have some good news:

There are various treatments you can do to improve the quality and texture of your hair but you need to make sure you are using the RIGHT supplements for YOUR body. 

In this post I go over the best hair growth vitamins, how to use them, which ones work best and how to determine if you need further evaluation. 

Let's jump in: 

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What Really Causes Hair Loss

Can vitamins and supplements actually help regrow your hair?

It turns out that the answer to that is yes, but they must be used correctly.

In order to understand which supplements to use you need to understand why you are having hair loss to begin in.

Hair loss occurs as a result of multiple causes:

  • Nutrient deficiencies (due to poor diet, processed foods, etc.)
  • Mineral deficiencies (specifically iron)
  • Hormone imbalances including: high testosterone (specifically in women), low thyroid (both sexes), high cortisol (both sexes)
  • Exposure to repeated or chronic stress
  • Genetics (we can't change this)
  • Certain medications (including some thyroid hormones)

​So if you know WHY you are having hair loss then you can target your treatment to that specific problem. 

Unfortunately you may have one or more of the following issues going on in your body without knowing it, which creates a problem for us. 

​Luckily there are several things we can do to test for these problems and you can match your symptoms to the various problems to pinpoint where your problem is. 

Once you have that information down you can target your treatment to get results. ​

​How to Regrow your Hair with Vitamins & Supplements (Start here)

If you know you don't have any issues with hormones, stress, etc. then you can start here. 

These supplements are REQUIRED for proper hair growth and they also happen to be depleted in many individuals.

​The use of these supplements will result in increased hair growth, increase hair volume and increased hair density. 

Hair growth vitamins that work pinterest

#1. Biotin + Silica + Choline

​Studies have shown that certain nutrients can dramatically help improve hair growth even in nutrient repleted states. 

​The combination of Biotin and Silica represents one such combination. 

​In this study women with thinning hair were given that combination of supplements over 180 days

hair regrowth study

Compared to placebo the women had an increase in hair volume and number of hair follicles that was twice that of the control group (placebo). 

This supplement is probably my favorite and one of the most effective hair regrowth supplements that I know of. 

Does it work for everyone?

Unfortunately not, but in my experience up to 60-70% of people who try it will experience some benefit. ​

If you decide to use this supplement make sure you use it for at least 2 months.

If you don't notice any improvement after 2 months then you aren't likely to be a responder and you should re-evaluate the cause of your hair loss. ​

How to Supplement with Silica + Choline + Biotin

Why I like it

Helps increase hair volume + thickness

Many hypothyroid patients are deficient

May also improve other skin conditions

Works relatively quickly (usually within 1-2 months)

How to Use

  • 1 Capsule two times per day (used in the morning and in the evening, but make sure to use away from your thyroid hormone)
  • You should first notice improvement in hair thickness and volume within 1-2 months, then an increase in hair growth thereafter
My Recommended Brand and Product:
Thyroid Hair Regrowth Complex mini

#2. Iron

Iron represents one of the most common and underappreciated causes of hair loss in women.

Why?

Because adequate iron stores (in the form of ferritin) are REQUIRED for optimal hair growth and this has been shown in several studies.

You need at least a ferritin level of 30ng/ml for optimal hair growth.

low ferritin lab tests

By the way - this is usually why women who take a prenatal vitamin experience increased hair growth. 

It's because MANY women are iron deficient and pre natal vitamins almost always contain iron. 

​So why is this an issue?

Because most of the focus of physicians is on iron deficiency but only if it causes anemia.

But many studies have shown that low iron by itself (even with normal RBC/hemoglobin count) STILL influences hair growth and can cause hair loss long term.

​This is a big deal for women because of menstruation. 

If you have a heavy menstrual cycle there is a high chance you may be iron deficient (as evidenced by a low ferritin level) but NOT anemic.

If so then you need to make sure you check your iron studies including your ferritin.

If you find that your ferritin is below 30ng/ml AND you are experiencing hair loss then treating with iron would be the first step to take. ​

If you've taken iron before and it has made you constipated then you will be happy to know that you can take liquid iron which does not cause constipation and will still be absorbed. 

How to Supplement with Liquid Iron

Why I like it

May Boost Energy Levels

Up to 50% of Hypothyroid patients are deficient in iron

Helps promote thyroid conversion & function

Generally works within 1-2 months

How to tell if you Need it

Check your iron studies and only supplement if your levels are sub optimal or low: 

  • Ferritin - Optimal Levels = 40-50
  • Serum Iron - Middle of the reference range
  • TIBC (Total Iron Binding Capacity) - Middle of the Reference range
  • Percent Saturation - 35-38%
Low iron studies patient case study
How to Use

  • Liquid iron: Start with 10 ml each day, do not exceed 20 ml per day (if you take more than 1 dose per day make sure to split it apart from one another and take at least 4 hours away from your thyroid medication)
  • Iron capsules: Start with 1 capsule of iron and increase up to 3 per day as tolerated and based on your serum iron/ferritin levels (take at least 4 hours away from your thyroid medication)
My Recommended Brand and Product:

Use liquid iron if you have intestinal issues such as gas, bloating, diarrhea, constipation or if you have previously failed capsule forms of iron: 

Use this capsule form if you don't tolerate the liquid iron version above (some patients have various symptoms on liquid iron such as teeth pain or simply can't tolerate the taste or texture of the liquid): 

#3. ​L-Lysine

L-lysine is another overlooked nutrient required for optimal hair growth.

L-lysine is present in the hair root and is responsible for the shape and volume of your hair.

When you are deficient in l-lysine your hair becomes brittle, thin and limp

​This is a big deal for several reasons: 

First:

It is often overlooked and quite common.

Not many people take L-lysine despite the many benefits it has (even on immune function). 

Second:

L-lysine is required for optimal absorption of both ​iron and zinc. 

We just got done discussing how important iron is for hair growth but we need to take it one step further.

Iron deficiency can definitely be caused by iron less (through menstruation, etc.) but it can also be caused due to reduced absorption.

And this is where L-lysine comes in.

Even if you are taking iron supplements you may not be absorbing it.

And l-lysine has been shown to INCREASE that absorption (along with zinc). ​

So if your hair quality is changing, or you feel that your hair is getting more sparse or more thin than it has been in the past it is a great idea to try the combination of L-lysine plus Iron plus zinc.

This combination gives you back ALL of the critical nutrients required for hair growth.

​*We haven't discussed the importance of Zinc at this point but we will discuss it later in this post. 

How to Supplement with L-Lysine

Why I like it

May improve immunity

Required for hair growth

Works in tandem with Iron to help hair growth

Works relatively quickly (within 2 months if used with iron)

How to tell if you Need it

Patients who still have hair loss despite iron supplementation and normal ferritin levels should consider adding L-lysine to their regimen to boost hair growth. 

How to Use

  • Use 1,500mg per day (3 capsules) for best results in combination with iron, but away from thyroid hormone
My Recommended Brand and Product:

#4. Minoxidil​

​Minoxidil isn't necessarily a vitamin, it's actually a medication, but it can be purchased over the counter. 

It's actually FDA approved to treat hair loss in both men and women and can be helpful in certain circumstances so it's worth mentioning here.

hair growth with minoxidil

​It's not a matter of whether minoxidil works or not, it definitely works - it wouldn't be FDA approved if it didn't. 

The problem with minoxidil is that once you stop using it your hair will go back to the way it was previously, and that's the issue.

The entire goal of growing your hair, increasing your volume and density is so that it STAYS that way.

But, as I mentioned, minoxidil still has value and here's why:

First:

Minoxidil can be combined ​with other supplements for a compounded boost to hair growth. 

What I mean is you can start minoxidil AND other therapies at the same time.

Once your hair starts growing from the other therapies then you can stop the minoxidil (or continue with it if that's your preference). ​

Second: ​

Minoxidil offers a very quick solution to your hair loss/thinning hair. 

It offers immediate improvement and has a very high chance of working. 

This is important because we have to realize that hair loss can have a very big effect on self confidence. 

If you have significant anxiety surrounding your hair loss, or your thinning hair is keeping you from going out into the public then minoxidil (short term) is a good idea to use while you also try other supplements. ​

In terms of how it works?

We aren't 100% sure how minoxidil works, we just know that it does.

Studies have shown that it probably works by increasing blood flow, improving oxygenation to hair follicles and by altering certain potassium channels - all of which likely help to reduce hair loss and increase hair growth. ​

If you choose to use Minoxidil just remember that once you stop using it the beneficial effects that you experienced will subside (unless you use minoxidil + other vitamins). ​

How to use Minoxidil

Why I like it

May Improve Reduce hair loss very quickly

Very safe and well tolerated

Works immediately but shouldn't be used by itself

Generally works within 8-12 weeks

Who should use it
  • People who are self conscious about their hair loss and need an immediate stop to the hair loss
  • People with high levels of testosterone (both men and women) who haven't been able to lower it through lifestyle changes
  • People who have tried other oral supplements without benefit
How to Use

  • Apply the topical solution to your scalp (or areas where your hair is thin, remember that this works topically)
  • Make sure to wash your hands afterwards so you don't stain your cloth (and be careful because it can run down your head)
  • Allow enough time to dry (usually between 2-4 hours) before shampooing your hair or applying hair spray, etc. 
  • Apply at least once per day but preferably twice per day
My Recommended Brand and Product:

#5. B12 Shots​

B12 is another big one that is worth spending some time on.

I specifically mention B12 shots here instead of oral or sublingual B12 and that is intentional.

​Before we talk about why B12 shots are superior we need to establish why you would want to use B12 for your hair. 

Well it turns out that studies have shown that you need all of the following nutrients in adequate amounts in order to regrow your hair: 

  • Vitamin B12 level: Serum levels need to be higher than 700 (I prefer 1,000) ng/L
  • Ferritin: Must be 70 ng/ml (some studies show greater than 30, but I prefer closer to 50-70)
  • Hemoglobin: Must be at least 13 g/dL in women 

We've already talked about ferritin (which is a marker of your iron stores) and hemoglobin isn't usually a problem unless you have iron deficient anemia - but most patients are aware of this condition. 

That leaves the B12. 

You probably know Vitamin B12 as the "energy" nutrient, but what you might not have known is that it also plays an important role in hair growth.

​Like iron, Vitamin B12 is another very common nutrient that many patients are also deficient in. 

B12 requires proper thyroid hormone, gastric acid and other cofactors for optimal absorption. 

This leads to a situation where many patients taking oral B12 supplements (and even sublingual B12 drops) still have sub optimal levels.

And that's where B12 shots come in.

Taking B12 bypasses gastrointestinal absorption by placing the B12 directly into your subcutaneous or skeletal muscles.

This results in near 100% absorption and assimilation right into your cells for optimal benefit.

​B12 shots also come with other benefits including potentially helping with weight loss, energy and more... 

How to Supplement with Vitamin B12 Shots

Why I like it

May Boost Energy levels and reduce fatigue

May help increase metabolism and fat loss

Helps improve mood and increase concentration

Generally works very quickly (within 1-2 weeks)

How to tell if you Need it

Patients with the following symptoms should consider using B12 shots: 

  • Obesity or weight gain 
  • Fatigue or low energy levels
  • Lack of sleep or insomnia (including difficulty falling asleep)
  • Depression or other mood issues like anxiety
  • Hair loss or a lack of hair growth
  • Low serum B12 levels (less than 1,000)
  • High homocysteine levels (greater than 9.0)
  • MCV (mean corpuscular volume) that is higher than 92
  • High levels of inflammation
Low serum B12 levels
How to Use

  • Take 5,000 mcg of Methylcobalamin every 7 days for at least 10 weeks
  • You will need 10 weeks worth of injections to saturate tissues and increase cellular B12 levels
My Recommended Brand and Product:

Make sure you get methylcobalamin shots in a high enough dosage for best results. You can purchase high quality, pharmaceutical grade methylcobalamin which comes pre-filled with needles and syringes in the box below: 

These first 5 supplements are all things that can boost hair growth and can be used if you aren't certain what is causing your hair loss. 

Below I will go over some other specific situations that can lead to hair loss and how to deal with those. ​

What if High Testosterone is Causing your Hair Loss?​

Another very common reason for hair loss in women is due to high testosterone levels.

Much like men, women also can develop hair thinning and a male pattern baldness like scenario based on their testosterone levels.

​High testosterone levels can also cause coarse or dark hair growth in other places like the chin and upper lip. 

male patterned baldness

I won't go over the causes of high testosterone here, but you can read more about how to diagnose and treat high testosterone in this post

For now I want to focus on why high testosterone levels generally lead to hair loss in women.

​When we talk about testosterone in women we really need to talk about testosterone metabolites. 

It turns out that androgens, specifically a very potent androgen​ known as DHT or dihydrotestosterone has direct action on hair follicles that leads to hair loss in both sexes. 

Testosterone metabolism

​Your body turns testosterone into DHT through the enzyme 5-a reductase. 

So high activity of this enzyme will result in higher than normal testosterone metabolism in favor of more DHT.

The more DHT you have (as a woman or male) the more hair loss that occurs. ​

What makes this tricky is that standard lab tests only check for serum testosterone levels.

Very few physicians actually check for DHT, so it can be missed. ​

The good news is that there is a way to slow down the enzyme 5-a reductase and reduce the amount of DHT your body is producing.

The way to do this is by using two supplements:​

#1. Zinc + Saw Palmetto

​Both zinc and saw palmetto have been shown to slow down this enzyme and reduce DHT production

This gives you a powerful tool in managing testosterone conversion inside your body.

Taking the combination of these supplements won't necessarily reduce your total testosterone level, but it will impact your DHT conversion.

Along with this benefit, the combination of zinc and saw palmetto also has positive influence on inflammation, immune function and even thyroid function in your body.

We will talk more about zinc and thyroid function, but just realize that zinc IS required for hair growth as well.

So taking zinc in this setting is actually a really great idea.

By the way, this is also why taking zinc for acne has been shown to be helpful in hormonal acne (it reduces androgen activity in hair follicles AND sebaceous glands).

So how do you use these supplements?

How to Supplement with Zinc & Saw palmetto

How to Use

  • Take up to 60mg per day of zinc (max) - Zinc can also help promote proper thyroid function and immunity 
  • Take up to 600mg per day of Saw palmetto
  • Combine both therapies for maximum benefit
My Recommended Brand and Product:

Use 30-60mg of Zinc bound to picolinic acid per day and use it in conjunction with saw palmetto to help lower testosterone levels: 

Use 600mg of Saw palmetto along with 30mg of zinc per day:

What if Hypothyroidism is Causing your Hair Loss? 

Ok this is another big one and worth spending some time on as well.

You probably already know that low thyroid function is associated with hair loss, but what you may not have realized is how common the condition actually is. 

Hypothyroidism is so common that I have 50+ posts on the subject alone.

Some studies show that up to 10-20% of people have thyroid related diseases (and at least 10% of the population is walking around without knowing it). ​

In addition most of us think as hypothyroidism as CAUSING obesity, but the opposite is also true.

Obesity causes thyroid dysfunction.

This means if you are overweight you HAVE thyroid issues, whether or not your thyroid problem caused your weight gain. ​

Couple this with the fact that most patients are under treated and/or misdiagnosed and you can see that the odds are high that (or inability to grow your hair back).

So how does this relate to hair loss?

Well, because your thyroid has direct action on your hair follicles any problem with your thyroid will also result in a problem regrowing your hair.

In fact, hair loss is one of the major symptoms of hypothyroidism, right up there with weight gain and fatigue. 

When you take a look at these symptoms it's easy to see that many people are suffering with thyroid issues without even realizing it. 

Other symptoms that tend to accompany thyroid problems include: 

  • Weight gain or inability to lose weight
  • Hair loss, brittle hair or inability to grow back your hair
  • Fatigue or low energy
  • Problems with sleep
  • Menstrual irregularities
  • Constipation or other GI problems like gas/bloating/acid reflux
  • Mood issues like depression or anxiety

​Bottom line?

If you have hair issues AND any of the above symptoms then you need to have your thyroid function evaluated correctly.

​Why?

Because if you don't address your thyroid then it will be difficult to regrow your hair. 

Having said all of this there are a couple of things you can do to boost your thyroid function, and these supplements also happen to be required for proper hair growth anyway so it's a win-win. ​

You can read more about the symptoms of hypothyroidism and learn how to accurately test for thyroid issues here

#1. ​Zinc

We've already discussed how zinc can positively impact testosterone metabolism.

What we need to talk about now is how zinc can positively impact thyroid function AND improve hair growth.

Zinc metabolism has been shown to be required for optimal hair growth (this is why zinc is almost all hair growth formulations).

​Not only is zinc involved in the hair growth cycle but it's also a nutrient that many people are deficient in. 

People who notice an improvement in their hair when taking zinc probably don't realize HOW it's working, they just know that it is working. 

Taking zinc can help improve your hair growth if your problem is related to thyroid function because zinc actually increases peripheral thyroid conversion.

Most of the thyroid hormone in your body ​is circulating around in an "inactive" form. 

In order for thyroid hormone to be activated your body needs certain nutrients like selenium and zinc.

When in adequate amounts these nutrients help boost the conversion from T4 (the inactive thyroid hormone) to T3 (the active thyroid hormone).

Zinc obviously plays a role in this important process but it also helps metabolize testosterone, reduce inflammation, promote hair growth directly and improves immunity.

​These factors make taking zinc very important if you are having issues with hair growth. 

How to Supplement with Zinc

How to Use

  • 30-60mg of Zinc Picolinate per day (Do not exceed 60mg per day)
My Recommended Brand and Product:

#2. Selenium​

Selenium is another important nutrient that many people are deficient in. 

What's more is that selenium is required for proper hair growth. 

Why?

Because selenium is an important part of selenium proteins that play a role in thyroid function, DNA synthesis and anti oxidant defense. 

Selenium is also a component of the hair matrix and normal levels must be taken up by hair follicles in order to have normal hair growth

In addition, selenium also promotes T4 to T3 conversion in deficient patients and may boost immune function. 

Couple all of these benefits together and you can see why patients with hair issues should consider supplementing with selenium. 

If you do decide to supplement with selenium it's also a good idea to combine the combination of zinc plus selenium. 

These two nutrients seem to work in tandem with one another in a multiplicative effect. 

How to Supplement with Selenium

Who should use it
  • Patients with hair loss or hair thinning
  • Patients with known a known thyroid disorder and hair loss (or brittle hair)
  • Patients with other nutrient deficiencies like zinc or iodine
  • Patients who frequently take acid blockers for acid reflux
  • Patients with other GI related issues (gas/bloating, IBS, IBD, etc.)
  • Patients also taking Zinc
How to Use

  • 200-400mcg per day (do not exceed 400mcg per day)
My Recommended Brand and Product:

Other Factors that Cause Hair Loss

We've already hit that majority of the main causes of hair loss and how to treat those problems, but we aren't done yet.

There are other conditions that alter hair loss and they should at least be considered if you don't know why your hair is falling out or not growing as well as it used to.

Remember that these conditions I am talking about are complex and usually interact with multiple systems in the body.

Because of these interactions it is important for you to address any and all problems you find in your body.

By taking this approach you will have the best success in improving your hair texture, quality and density. ​

Stress

Stress is often overlooked as a cause of disease, even though it may be one of the most important aspects of modern diseases.

Stress has been linked to multiple disease states (including an increased risk for heart disease and developing autoimmune disease) but here we will focus on its effects on hair follicles.

It is well known that high levels of stress alter the life cycle of your hair follicles.

When you perceive stress (this can be emotional, physical or social) your body responds by releasing cortisol - your stress hormone.

​Simply triggering this stress response isn't necessarily a big deal, but when you constantly trigger your stress from day to day activities then you develop problems. 

This constant exposure to stress alters your HPA axis and cortisol levels.

​This is important because high levels of cortisol have been shown to alter hair growth acceleration by up to 40%

​What this means for you is this:

High stress levels may be LIMITING the ability your body has to regrow your hair.

So while it may not necessarily cause hair loss (although it can if you develop autoimmune disease) it most certainly will limit your body's ability to regrow any lost hair.

This can be incredibly problematic if you have more than one condition like hypothyroidism induced hair loss PLUS stress which can then limit regrowth potential.

So what can you do about it?

It turns out that certain adaptogens can help reduce your cortisol level and indirectly influence hair growth through this mechanism.

​The adaptogen I am referring to is known as Ashwagnahda and it has been shown in certain individuals to dramatically improve hair growth: 

How to Supplement with Ashwagandha

How to Use

  • Dosage varies from 500-2,000 mg per day depending on tolerance and degree of symptoms
  • Length of treatment varies by condition, for adrenal fatigue supplementation as long as 6+ months may be required.
My Recommended Brand and Product:
A.R.C II (Adrenal Reset Complex) mini

Estrogen/progesterone imbalances

​Lastly, and another important factor for hair loss, is your sex hormones. 

We've already discussed how testosterone can influence hair growth but it turns out that your estrogen and progesterone levels ALSO play an important role.

estrogen and hair loss

​In fact, it's well known that estrogen helps your hair stay thick and grow quickly. 

This explains why some pregnant woman notice an improvement in both the texture and quality of their hair (and unfortunately why the hair reverts back to normal post pregnancy).

What you may not realize is that estrogen/progesterone imbalances lead to hair LOSS and a reduction in the quality and texture of your hair.

Another important factor is that these imbalances in estrogen and progesterone are increasingly becoming more common.

How do you know if you have sex hormone issues?

You may have 1 or more of the following symptoms:

  • Hair loss (or changes to hair density or texture)
  • PMS/PMDD
  • Menstrual irregularities
  • Mood changes (especially that coincide with your menstrual cycle)
  • Bloating or swelling in extremities
  • Breast tenderness
  • Pelvic cramps or pelvic pain
  • History of PCOS, endometriosis or fibrocystic breast disease

​If you are experiencing any of the symptoms listed above AND you have hair issues then you may have a problem with your sex hormones. 

If this is the case then you should read this article for more information on how to balance these hormones and promote hair growth.

​The evaluation of sex hormones, and treatment of those problems, can be quite complex and I've gone into detail in previous posts about how to treat it but I won't include it in this post. 

Back to you

​The moral of the story:

Hair loss is a complex issue and may require more than just 1 or 2 supplements to fix the problem.

Your hair follicles are influenced by a variety of factors including: stress, hormones, nutrients and even your diet.

If you want to promote proper hair growth you need to find WHAT is wrong in your body and fix that problem.

Having said that there are multiple nutrients that have been shown to simply promote hair growth and these would be where you should start.

If you fail with these basic nutrients then it might be time for further evaluation of your thyroid function and sex hormones with specific treatment to those areas if necessary.

Now it's your turn:

Have you used hair regrowth vitamins successfully?

If so, which ones worked best? Which didn't work?

Leave your comment below! ​

Westin Childs
 

I'm Dr. Childs and I write these posts. I'm a physician that specializes helping patients lose weight, have more energy and FEEL better. My practice focuses on hormone imbalances, thyroid issues and weight loss resistance. My goal is to provide the BEST information out there on the internet that is both actionable and trustworthy. Get my free 3 day meal plan here. You can also find more about my personal journey back to health here.

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