Can mushrooms boost Vitamin D and beat the winter blues?

Last Updated on September 9, 2022 by Aaron von Frank

Got the fall or winter blues? In this article, we’ll share some simple steps you can take to boost your Vitamin D levels and elevate your mood — including a fascinating trick using shiitake mushrooms! 

---

Winter blues? The link between Vitamin D and your health… 

In the cold, dreary days of fall and winter, one of the most important thing you can do to battle winter blues and keep yourself feeling great is to get lots of vitamin D, aka the “superstar vitamin.”

Shockingly, up to 40% of Americans may be Vitamin D deficient. Chronic Vitamin D deficiency can impact more than your mood… It can potentially lead to hundreds of different disorders and diseases, including bone softening, multiple sclerosis, cancer, and diabetes.

How much Vitamin D do you need?

Until recently, the recommended daily allowance (RDA) for Vitamin D was 600 IU per day. Not that much. 

Now, many nutrition scientists and medical organizations say that a healthy adult should be getting far more than 600 IUs of Vitamin D per day. For instance:

• the Vitamin D Council recommends that adults take 5000 IU of vitamin D3 daily,
• the Institute of Medicine (IOM) established 4000 IU daily as the upper level of intake,
• the Endocrine Society Practice Guidelines state that up to 10,000 IU of vitamin D3 daily is safe for most adults.

Further complicating matters is that factors such as age, Body Mass Index (BMI), genetics, and other health factors means that recommended daily intakes of Vitamin D might vary significantly by person.  

No, don’t get your Vitamin D from pills

Just go to the store and get some vitamin D pills, right? No!

Despite the fact that we all grew up believing vitamin pills were the foundation of good health (thanks to million dollar marketing campaigns), modern scientific research has found that — with rare exception — vitamin supplements have no health benefits or even worse: actually cause harm. Vitamin D pills are no exception.

If you’d like to read more on the bad science and false claims behind vitamin supplementation, here’s a brilliant article in The Atlantic about Linus Pauling, the man credited with starting the vitamin craze in the 1970s. Pauling’s voracious vitamin consumption (and public promotion thereof) likely caused his and his wife’s deadly cancer. Unfortunately, despite the lack of efficacy and negative health effects, vitamin supplements continue to be a multi billion dollar industry in the US today.

As Harvard Medical School says, for optimal health you should get your vitamins and nutrition from real, whole foods, NOT from pills.

How to make or eat your own Vitamin D

“Vitamin D” is actually a broad term that refers to a range of different secosteroid compounds. The vitamin D compounds that matter most to humans are:

• D2 (ergocalciferol) – from non-animal sources (plants, fungi, etc);
• D3 (cholecalciferol) – from animal sources or sunlight.

Vitamin D3 from sunlight

Thankfully, your body can actually make its own vitamin D. When you’re outdoors without sunscreen on, the sun’s energy turns a chemical in your skin into Vitamin D3, which is carried to your liver then to your kidneys, where it is transformed into active vitamin D3 utilized by your body.

How much Vitamin D3 can your skin make?

If you’re a light-skinned person who walks outside in the summer (without sunscreen on) wearing shorts and a tank top, your body will be able to make about 1,000 IU of vitamin D per minute of full sun exposure. So, after 7-10 minutes, you’ll have all the vitamin D you need for the day (7,000 IU).

If you’re wearing sunscreen, elderly, or have dark skin, you won’t produce as much vitamin D in the same time period. 

Getting Vitamin D3 and D2 in the winter

How do you get Vitamin D in the fall and winter?

If you live north of Atlanta, we’ve got bad news: there’s no way your body can produce enough vitamin D in the winter from sun exposure alone. The sun simply isn’t high enough in the sky for enough UVB rays to penetrate the earth’s atmosphere — and there’s a good chance your skin is covered with warm clothes anyway.

If you can’t take supplements or get enough sun exposure, how do you get enough Vitamin D in the winter to stay mentally and physically healthy?

Your diet. No, we don’t mean a fad diet, we mean eating real, whole foods.

Some foods are particularly high in vitamin D. Wild caught salmon is one of the highest sources of D3 available (interestingly, farm raised salmon has 75% less D than wild caught).

Our personal favorite source of vitamin D3 is the eggs from our ducks. Similar to wild salmon, ducks and chickens raised outdoors on healthy diets produce eggs that have 4x more D3 than standard eggs. As we’ve written about previously, duck eggs are even more nutritious than chicken eggs.

A simple hack to massively boost Vitamin D in shiitake mushrooms

Magic mushrooms? No, we’re not talking about that kind of mushroom.

Surprisingly, you can also get huge amounts of Vitamin D2 from mushrooms. In fact, delicious shiitake mushrooms are one of the most vitamin D rich mushrooms available.

Here’s an amazing hack you can use to drastically boost your vitamin D intake from shiitake mushrooms: place dried or fresh shiitake mushrooms gill side up in the sun for a day. Doing so, will increase the Vitamin D in your shiitake mushrooms from 100 IU/100 grams to 46,000 IU/100 grams. (For reference, one serving of regular shiitakes contains 145 grams Vitamin D.)

That will get your batteries charged up and blast away those winter blues! 

You can often find shiitake mushrooms at high end grocery stores. Or you can grow your own… Read our guide How to grow shiitake mushrooms if you’d like to grow your own delicious, medicinal shiitake mushrooms at home.

---

Now go forth and conquer your fall or winter blues using whole foods, sunshine, and Vitamin-D charged gourmet mushrooms!

KIGI,