Female hand holding vitamin D supplements in sunlight

Vitamin D and Testosterone – Does Vit D Increase Free Testosterone?

We all know vitamin D and how it’s important for you, but what do you know about the connection between vitamin D and testosterone? There is a lot of speculation about how these two are linked and whether you can boost your t-levels with the right vitamin D supplements. What is true? How do you separate fact from fiction?

Let’s have a closer look at how testosterone and vitamin D function within your body. More importantly, let’s see how they are linked and what this means for you and your search for natural ways to increase your testosterone levels.

What is vitamin D?

What is testosterone?

Link between vitamin D and testosterone

Does vitamin D increase testosterone?

Benefits of vitamin D supplementation

Scientific research on vitamin D and testosterone

vitamin d benefits

What is vitamin D?

So before we get to the question whether vitamin D raises testosterone we need to look at some other things first. We need to answer: what is vitamin D exactly, what is the role of vitamin D in our body, and how is vitamin D produced?

Role of vitamin D

Vitamin D is actually the name of a group of vitamins. They are so-called fat-soluble secosteroids and one of their roles in the body is to increase your body’s capability of absorbing minerals such as calcium, magnesium, and phosphate. As such, vitamin D is especially beneficial for your bone structure: it gives you stronger bones!

Not enough vitamin D can lead to severe bone conditions. It can cause rickets, which affects the bone development in children and can cause pain, poor growth, and soft bones; which in turn leads to bone deformities. In adults it can lead to a similar condition called osteomalacia. Both conditions are mostly due to a vitamin D deficiency. You can see how important vitamin D is for our health!

But that’s not all…

Studies have shown, for example, that vitamin D supports your immune system, making you less likely to become sick! Another often studied link is the one between vitamin D and the cardiovascular system. Such studies suggest that sufficient amounts of vitamin D support the blood flow through your body. So vitamin D can actually get your blood pumping!

Still not convinced about vitamin D? Another study looked at the relationship between vitamin D and body composition, muscle strength and decreased body fat and – again – the results are all in favor of the D!

These are just a few examples of the positive effects vitamin D has on your body – and then we haven’t even looked at vitamin D for testosterone yet! But more on that later though; let’s first see how we can actually get the vitamin D we need.

vitamin d sources

How is vitamin D produced?

So how can we give our bodies enough vitamin D? What are the typical sources of vitamin D? Let’s look at the top two.

Sunlight | Food


Let’s start with the most obvious one; there is a reason why this vitamin is nicknamed ‘the sunshine vitamin’! When your skin is directly exposed to sunlight your body will actually make its own vitamin D, which in turn will help your body with all the benefits we mentioned above.

Let me guess, you’re now thinking; “so if I just go for a walk in the sun I get vitamin D? So why not just do that?” Wouldn’t that be amazing, raising your testosterone by chilling in the sun! Unfortunately, there are several ‘buts’…

  1. Imagine we are in a cold, seasonal climate – say in Boston, for example – and you have a Caucasian skin tone. You can often get enough vitamin D by walking outside in the sun during Spring and Summer, but what about Fall and Winter? Without taking vitamin D supplements, most people in these regions suffer from vitamin D deficiency, especially during Winter.
  2. Why did we specifically say Caucasian? Because people with a darker skin tone won’t get the same amount of vitamin D from the sun. People with a dark skin have to spend longer in the sun for their bodies to produce the same amount of vitamin D. So if you have a dark skin and live in Boston, you have an even higher risk of suffering from a vitamin D deficiency.
  3. This ‘but’ is the most important one: the negative effects of too much direct sunlight. Your body needs ultraviolet B rays (UVB) to produce vitamin D. These rays can’t get through windows, so to reap the benefits of the sun you need bare-skin exposure.
    But wait…haven’t we always been taught that bare-skin exposure to the sun causes a greater risk of skin cancer? Yep, that’s true. You see the problem now…?

The nickname ‘sunshine vitamin’ sounds great and catchy but, unfortunately, getting enough of the vitamin isn’t just a simple walk in the park. During the summer months, you will most likely receive enough through sunlight (and other sources of vitamin D, we’ll get to that now). But when the temperatures drop and the days get shorter, you have to start looking at alternatives. So what other sources of vitamin D are there?

vitamin d sunshine


So if we can’t get enough sunlight, how else can we get vitamin D? The answer: food.

Now, unfortunately, you won’t find it in many foods. Nevertheless, there are a few sources that are rich in vitamin D and which can definitely help you get the desired boost; especially for those long, dark winter months. We made an overview for you of the most common foods rich in vitamin D.

Vitamin D foods:

  • Mushrooms
  • Fish liver oil
  • Egg
  • Salmon
  • Beef
  • Mackerel
  • Sardines
  • Tuna

To get enough of vitamin D from these foods you would really have to eat a lot of them, and especially as a vegetarian or vegan this is almost impossible. So what to do?

Firstly, there are more and more manufactured foods on the market that are fortified with vitamin D. Some examples are fruit juices, breakfast cereals, and soy protein-based drinks.

Secondly, you can take additional vitamin D supplements. In fact, the UK’s National Health Service even advises people to do so during Winter. Luckily, there are currently loads of these supplements on the market for you to choose from. These can be special supplements with just vitamin D, or you can find pills or tablets containing vitamin D, but also helping out with other things your body might be lacking.

Take, for example, TestoGen testosterone booster, which doesn’t just contain the vitamin D you need, but also many other essential natural ingredients your body needs and which help increase your testosterone. But what is testosterone exactly? And why do we need it?

What is testosterone?

Testosterone is a steroid hormone found in both men and women (that’s right, it’s not just the male hormone). However, it is often described as “that which makes a man a man”, and men have a higher amount of it than women.

Testosterone is produced in the testes and in the adrenal glands. Furthermore, women’s ovaries produce small bits of testosterone as well, supporting many bodily functions just like in men. Our blood contains two types of testosterone:

  1. Bound testosterone
    The majority of testosterone in your body is bound testosterone. It attaches – or binds – to two types of protein in your blood: sex hormone binding globulin (SHBG) and albumin. About 65 percent of your testosterone binds to SHBG, while about 30 to 40 percent binds to albumin.
  2. Free testosterone
    Then there is also a tiny bit of testosterone – only about 2 percent – which doesn’t bind to anything: free testosterone.

Why does it matter? Here is a (rough) overview to simplify things:

total testosterone

Testosterone is essential for your health, especially in areas such as athletic performance, general strength and muscle development, and – of course – your sexual function.

Testosterone levels in men start to rise during puberty, stimulating sperm production, increasing bone and muscle strength, promoting the growth of body hair, and much more. Basically, it’s the thing that makes you more manly. You can see why testosterone is crucial to your health!

Link between vitamin D and testosterone

So we know now how serious low testosterone and low vitamin D are, but what we haven’t discussed yet is the link between the two. Are they really linked and if so, does that mean we can use supplementation of vitamin D for testosterone boosting?

To answer this question, let’s have a look at what scientific research has to say about the matter.

For example, researchers from the Harvard School of Public Health performed an extensive study with 1,362 male participants, testing the association between plasma 25-OH vitamin D and testosterone levels in men. The result of their study supports the positive associations between vitamin D and testosterone, confirming how they complement each other.

Maybe even more interesting is the following research performed on subjects from the US Military. The study focussed on Special Operations Soldiers and the correlation between testosterone and vitamin D. Results showed how vitamin D deficiency can inhibit the production of testosterone; effectively meaning low vitamin D = low testosterone.

Does vitamin D increase testosterone?

And there we have it folks. Does vitamin D increase testosterone? The answer: yes it does!

The studies described above are just two examples taken from an immense pool of studies that have been done on the matter, confirming the link between vitamin D and testosterone. Happy days!

Benefits of vitamin D supplementation

If you’ve come this far reading all the way through the article, the benefits of vitamin D supplementation will be clear. Vitamin D is extremely important for many general health matters like your immune system and your cardiovascular system.

Even more so, it’s a scientifically proven testosterone booster. If your t-levels are low, vitamin D will be able to pick you up; so vitamin D supplementation can really turn your life around!

Conclusion – lift your D to lift your T

The conclusion is clear. However, we should place a side note here. If it’s just vitamin D you’re after then we can definitely recommend going to your local pharmacist/health store to buy some vitamin D supplements to help you through the Winter.

But if you’re here because you are specifically looking for ways to boost your testosterone, the chances are just vitamin D supplementation is just not gonna cut it. Truth is; if you’re feeling down, without energy, and your sex life seems non-existent, you probably need more than just a vitamin D boost. Nature holds many more secret ingredients to boost your t-levels. Think for example about the aphrodisiac red ginseng (a.k.a. “Man root”), or fenugreek. Or are you aware of the benefits of zinc and vitamin D for testosterone?

If you are really looking to boost your testosterone you need more than just vitamin D supplementation. You need a supplement like TestoGen, which combines multiple natural ingredients in one powerful formula to attack your low t-levels and not only boost your vitamin D, but also your zinc, your magnesium, and much more to effectively boost your testosterone!

Scientific research on vitamin D and testosterone

Aranow C. (2011). “Vitamin D and the immune system.” Journal of investigative
medicine : the official publication of the American Federation for Clinical
Research, 59(6), 881-6.

Beveridge L.A., Witham M.D. (2013). “Vitamin D and the cardiovascular system.”
Osteoporosis International, 24(8), 2167-80.

Forney L.A., Earnest C.P., Henagan T.M., Johnson L.E., Castleberry T.J., Stewart L.K.
(2014). “Vitamin D status, body composition, and fitness measures in
college-aged students.” Journal of Strength and Conditioning Research,
28(3), 814-24.

NHS. “How to get vitamin D from sunlight.”

Nimptsch K., Platz E.A., Willett W.C, Giovannucci E. (2012). “Association between
plasma 25-OH vitamin D and testosterone levels in men.” Clinical
Endocrinol, 77(1), 106-12.

Wentz, Laurel & CB, Berry-Caban & JD, Eldred & Q, Wu. (2015). “Vitamin D
Correlation with Testosterone Concentration in US Army Special Operations
Personnel.” Conference Paper: Experimental Biology.

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