Dr. Eric Berg

What are the dangers of vitamin D?

They’re real, but probably not what you think.

What if the real risk isn’t toxicity, but a silent nutrient imbalance?

Here’s the truth about vitamin D “dangers” and how to avoid them the right way:

THREAD 🧵 

Most people hear “vitamin D danger” and assume overdose.

But true vitamin D toxicity, where calcium builds up in the blood, is extremely rare.

Even researchers who’ve studied high-dose vitamin D for decades report that they’ve never seen a single case.

So what’s the real risk?

The real risk is taking vitamin D3 without its key co-nutrients.

Vitamin D depends on other nutrients to function properly and safely.

Without them, D3 can create imbalances and cause unintended side effects.

Here are the four nutrients that are essential for optimal results:

1/ Magnesium

Magnesium is needed to activate vitamin D3.

When you increase D3, your magnesium needs rise too. If you’re low, you may experience:

• Muscle cramps
• Poor sleep
• Anxiety
• Irregular heartbeat

Magnesium also helps prevent calcium buildup in the arteries. 

2/ Zinc

Zinc is essential for vitamin D3 to bind to its receptor &amp; function properly.

Low zinc makes D3 less effective.

Signs of deficiency may include:
• Reduced taste or smell
• Dry skin or acne
• Low testosterone
• Weakened immunity

Best sources: red meat &amp; shellfish.

3/ Vitamin K2 (MK-7)

Vitamin D3 increases calcium absorption. K2 directs it to bones and teeth.

Without K2, calcium may accumulate in arteries instead.

You want strong bones, not hardened arteries.

Sources include grass-fed butter, eggs, and fermented foods like sauerkraut. 

4/ Vitamin A (retinol)

Vitamin A and D3 work together. If one is low, the other is less effective.

You need the active form, retinol, not beta-carotene from plants.

Retinol supports vision, immunity, and prevents calcium buildup in arteries.

Top source: cod liver oil.

What happens if you skip these co-nutrients?

You may feel worse instead of better.

Common issues include:
• Muscle cramps
• Mood changes
• Poor sleep
• Skin problems
• Calcium buildup in soft tissues

Vitamin D3 is often blamed, but the real issue is nutrient imbalance.

If you’re taking vitamin D3, here’s how to do it right:

• Always choose vitamin D3, not D2
• Take magnesium glycinate (800 mg or more if needed)
• Add 100 mcg of vitamin K2 (MK-7) per 10,000 IU of D3
• Use cod liver oil for vitamin A
• Include zinc with trace minerals

Also watch for low-quality vitamin D3 supplements.

Many contain hidden fillers like maltodextrin or glucose syrup.

To test for starch, dissolve the capsule in water &amp; add a few drops of iodine.
If it turns purple, starch is present.

High-quality D3 stays clear or light yellow. 

Getting these nutrients from food is always best.

• Magnesium: leafy greens, pumpkin seeds, dark chocolate
• Zinc: red meat, oysters
• Vitamin K2: grass-fed butter, kimchi, eggs
• Vitamin A: egg yolks, liver, cod liver oil

Supplements help, but health begins with your diet.

So yes, there are real concerns with vitamin D, but the problem isn’t the vitamin itself.

It’s taking it without the nutrients that support it.

When paired with the right co-nutrients, vitamin D becomes a powerful ally for your immune system, hormones, bones, and brain. 

Many worry about taking too much vitamin D from supplements.

But real risk only comes with very high doses (100,000 IU+) taken without key supporting nutrients.

For a clear breakdown on how to use it safely and effectively, watch this video:
https://youtu.be/hrqr3IIoTOs

A bit about me:

I’m the creator of Healthy Keto® and Intermittent Fasting protocols, helping over 100M people make healthier choices.

Follow me @dr_ericberg for more evidence-based insights to improve your health and longevity.

Thank you for reading!

Now that you have a better understanding of vitamin D, share this thread with someone who might benefit.

If you have health questions, feel free to drop them below. I read the comments and often use them to create future content that matters to you.

https://x.com/dr_ericberg/status/1937858360793235871

The #1 Remedy for Dental Plaque

An estimated 70–80% of adults have tartar buildup.
And brushing alone won’t stop it.

Tartar is a hardened shield that traps bacteria on your teeth.
Left alone, it leads to cavities and gum disease.

Here’s how to get rid of it for good: 🧵 

Tartar starts when a bacteria called Streptococcus mutans feeds on sugar and makes acid.

Then it creates a sticky film that traps the acid against your teeth—like glue.

That acid eats away at your enamel and hides bacteria from your immune system.

But it doesn’t stop there…

This same bacteria isn’t just found in your mouth.

It’s also been discovered on heart valves—and even deep inside the plaque in your arteries.

So let’s dive into how to shut it down for good and protect your teeth, enamel, and oral health: 

The first step? Reduce your intake of sugar and starch.

Why starch? When combined with sugar, it creates a thick, sticky film that bacteria cling to—making plaque and tartar much difficult to remove.

But diet is just the beginning. What you brush with matters even more… 

Here’s a simple, effective homemade toothpaste to help break down tartar and support enamel:

• ½ tsp food-grade 3% hydrogen peroxide
• ½ tsp baking soda
• 3 drops clove oil
• ½ tsp microcrystalline hydroxyapatite
• 3 tsp water

Use once daily with gentle circular brushing.

Why it works:
• Hydrogen peroxide breaks down biofilm &amp; whitens teeth
• Baking soda scrubs gently &amp; neutralizes acid
• Clove oil disrupts harmful bacteria &amp; reduces inflammation
• Hydroxyapatite helps fill tiny cracks in enamel &amp; remineralize your teeth

And that’s not all…

Use probiotic gums or supplements to repopulate your mouth with beneficial bacteria.

These friendly microbes help reduce plaque, prevent cavities, and even improve breath.

Now let’s talk nutrition—what’s the best food for strong, healthy teeth? 

One of the best foods for dental health is grass-fed butter.

It’s rich in:
• Vitamin K2: directs calcium into your teeth and bones
• Vitamin A: supports strong enamel
• Butyrate: promotes gut and brain health

A simple addition with powerful benefits. 

In the 1930s, dentist Weston A. Price studied cultures with virtually no tooth decay.

He discovered that their diets—rich in grass-fed butter and fat-soluble nutrients—protected against cavities and supported strong dental structure.

He called this key nutrient “Activator X.” 

We now know activator X is vitamin K2—it moves calcium into your teeth &amp; bones, not your arteries.

Ironically, the butter once feared for cholesterol actually supports your teeth and heart.

Pair it with the homemade toothpaste &amp; oral probiotics for a stronger, healthier smile.

Try this routine for a few weeks and notice the difference—not just in your oral health, but your overall well-being.

For a deeper dive into how to protect your teeth and support long-term dental health naturally, watch this video:
http://youtu.be/y7g1gKyzL94

A bit about me:

I’m the creator of Healthy Keto® and Intermittent Fasting protocols—helping over 100M people make healthier choices.

Follow me @dr_ericberg for evidence-based tips to improve your health &amp; vitality.

What’s ONE thing you learned from this thread? Comment below…

https://x.com/dr_ericberg/status/1938583160234881195

Here’s the ugly truth about avocados (that you won’t like):

I used to think they were the most amazing superfood you could possibly eat.

I even recommended them to my patients…

Until I found this out: 🧵

Many avocados are artificially ripened.

They’re placed in gas chambers and treated with ethylene gas to speed up the process.

But this prevents natural flavor compounds and phytonutrients from developing.

It may look perfect outside, but it lacks quality inside.

Now let’s talk about avocado oil.

A study of 22 major brands revealed alarming findings:

• High oxidation levels (causing inflammation)
• Oils diluted with soy or canola
• Some products contained 0% avocado oil

82% of avocado oil on shelves is not what it claims to be.

Why oxidation matters:

Oxidized oil becomes harmful &amp; causes inflammation.

Just like a cut apple turns brown, avocado oil goes rancid when exposed to air, heat, or light.

You can’t taste it, but it is still there and damaging your body at a cellular level.

And it gets worse…

There are no official U.S. regulations for avocado oil.

Unlike olive oil, which has international standards, avocado oil can be diluted, deodorized, or mislabeled with no legal consequences.

Some bottles don’t even list an expiration date.

So how can you protect yourself?

How to protect yourself:
• Choose dark glass bottles
• Check for a harvest date &amp; expiration date
• Avoid the cheapest brands
• Fresh oil should have a slight green tint

Keep in mind: “Product of USA” may still be grown in China, blended in Mexico, bottled in the U.S.

What about guacamole?

Most fast-food guacamole contains less than 5% avocado, and sometimes none at all.

It’s often replaced with:
• Green peas
• Hydrogenated oils
• Starches and fillers

What you’re actually eating is mostly green goo.

Even skincare products can be misleading.

Many “avocado oil” creams list soy, palm, or mineral oil first.

The avocado oil is often just a trace amount, added for marketing purposes.

How to pick real avocados:
• Choose ripe, firm fruit
• Avoid shiny, wax-coated ones
• Test ripeness with a gentle thumb press

When selected properly, avocados are highly nutritious, packed with potassium, magnesium, and healthy fats.

One medium avocado provides up to 900 mg of potassium, essential for muscle, nerve, and heart function.

They’re also rich in magnesium and have far less omega-6 than seed oils.

But these benefits only apply to real, properly ripened avocados.

Avocados are still one of the best foods out there when chosen carefully.

They provide healthy fats, potassium, magnesium, and support overall health.

To learn more about the ugly truth of avocados and how to get the best quality, watch this video:

What is one key takeaway you gained from this thread? Share it in the comments below.

I read every comment and often use them to create future content that matters to you.