Where Should You Start on Dr. Colbert's YouTube Channel?

Start with the question you already have. The channel is organized around the topics patients ask about most: gut health, blood sugar and insulin resistance, hormones, energy and sleep, blood pressure and heart health, and the Keto Zone approach to eating.

You can watch Dr. Don Colbert's YouTube channel here.

Dr. Colbert has practiced medicine for more than 35 years, is board certified in Family Practice, and has written over 50 books on health and nutrition.

Why a Physician Teaches on Video at All

An appointment gives you one pass at an explanation, delivered while you are also absorbing news, remembering questions, and watching the clock.

Almost nobody retains a full explanation under those conditions. Video removes the time pressure. You can pause, rewind, and watch the same explanation three times, which is exactly what complex material requires.

Gut Health and Digestion

A good entry point if you have symptoms that never quite got resolved.

Digestive complaints are common and frequently treated symptomatically without anyone asking why they are happening. The Gut Zone approach covers how digestion connects to energy, immune function, and how you feel day to day.

Blood Sugar and Insulin Resistance

Probably the most useful topic for the largest number of people.

Insulin resistance develops quietly, often for years before a fasting glucose crosses a diagnostic line. Understanding what it is, how it shows up, and what actually influences it puts you ahead of a diagnosis rather than behind one.

Hormones, Energy, and Sleep

The cluster that sends most patients looking for answers in the first place.

Fatigue, disrupted sleep, mood changes, and weight shifts get treated as separate complaints when they frequently share a cause. This is also where hormone evaluation becomes relevant, and understanding the basics beforehand makes that appointment considerably more productive.

Heart Health and Blood Pressure

Worth watching precisely because these problems are silent.

Blood pressure, cholesterol, and metabolic markers change without producing symptoms. Video is a reasonable way to understand what your numbers mean before you are sitting across from someone discussing what to do about them.

The Keto Zone Approach

Dr. Colbert's Keto Zone approach focuses on reducing excess carbohydrates and building meals that support steadier energy and metabolic health.

Whether it suits you depends on your health history, any conditions you are managing, your medications, and what you can realistically sustain. Watching first is a low-cost way to decide whether it is worth a real conversation.

How to Use Health Videos Well

This applies to any channel, not only this one.

• Note what applies to your situation rather than trying to absorb everything
• Write down the questions a video raises for you
• Bring those questions to an actual appointment
• Do not start or stop a medication based on a video
• Be skeptical of anything promising one answer for everyone

General education tells you what questions exist. It cannot tell you which apply to your body, your history, and your medication list.

What Video Cannot Do

No video knows your history, your labs, or what else you are taking.

The same symptom points toward different causes in different people, and sorting that out requires someone examining you specifically. Education is genuinely valuable, and it is not a substitute for evaluation.

"The best appointments I have are with people who came in already understanding the basics," says Dr. Don Colbert, M.D. "We skip the introduction entirely and spend the time on what is actually going on with them."

Where the Practice Fits

Colbert Institute of Anti-Aging serves patients in Southlake, Texas and Lake Mary, Florida, offering hormone evaluation, nutrition planning, detoxification, emotional wellness care, and regenerative options.

A comprehensive evaluation starts with your history, symptoms, and appropriate testing, and the plan follows from what that finds.

Frequently Asked Questions

Do I need to be a patient to watch?

No. The channel is free and open to anyone, and much of the audience has never been to either clinic. It is educational content rather than patient-only material.

Can I ask a personal health question in the comments?

Individual medical questions cannot responsibly be answered in a comment thread, because a real answer requires knowing your history, medications, and examination findings. Those questions belong in an appointment with a clinician who can actually evaluate you.

How do I know which health videos to trust generally?

Reasonable signals include a named clinician with verifiable credentials, hedged language rather than guarantees, acknowledgment that recommendations vary between people, and a clear statement that content is educational rather than medical advice. Anything promising one solution for everyone deserves skepticism.

Watch First, Then Ask Better Questions

Start with the topic you have actually been wondering about, then bring what it raised to an appointment.

Patients visit our Southlake office from across the Dallas Fort Worth area, and our Lake Mary office from throughout Central Florida.

Schedule a consultation with Colbert Institute of Anti-Aging when you are ready to make it personal.

What Does Magnesium Actually Do in the Body?

Magnesium participates in hundreds of enzymatic processes, including muscle and nerve function, blood sugar regulation, blood pressure regulation, protein production, and the structure of bone.

That breadth is exactly why it gets recommended for almost everything, and why the advice around it is so often unhelpful.

Magnesium is among the most asked-about supplements on Dr. Don Colbert's YouTube channel, and it comes up constantly at Colbert Institute of Anti-Aging in Southlake, Texas and Lake Mary, Florida.

Why It Is Involved in So Much

Magnesium acts as a cofactor, meaning many enzymes cannot do their job without it present.

When a mineral is required across that many reactions, low levels can plausibly affect many systems at once. That is real. It is also why magnesium gets blamed for symptoms it has nothing to do with, because a broad role makes for a broad and untestable story.

The Measurement Problem

Here is the detail that changes how the whole conversation should be handled.

Most magnesium in the body sits inside bone and cells. Only a small fraction circulates in blood, and the body works to keep that circulating level stable. So a standard serum magnesium test can look entirely normal while stores elsewhere are not, which means the test is far less definitive than people assume.

What Can Contribute to Low Levels

• Diets low in leafy greens, nuts, seeds, legumes, and whole grains
• Digestive conditions that affect absorption
• Certain medications, including some diuretics and acid-reducing drugs
• Heavy alcohol use
• Poorly controlled diabetes, which increases losses through the kidneys

Age matters too, since absorption tends to become less efficient over time while intake often falls at the same stage of life.

The Forms Are Not Interchangeable

This is the practical point most people miss standing in a supplement aisle.

Different magnesium compounds behave differently in the body. Some are absorbed reasonably well. Others are poorly absorbed and act mainly on the digestive tract, which is why one product may loosen your stools while another does nothing of the sort at the same dose.

Buying magnesium without knowing which form you are buying is how people conclude that it either did nothing or upset their stomach.

Why the Label Dose Can Mislead

Labels sometimes list the weight of the whole compound rather than the elemental magnesium it delivers.

Since the compound includes whatever the magnesium is bound to, those two figures can differ considerably. Two bottles showing similar numbers on the front may not be delivering similar amounts, which is worth checking before comparing prices.

Interactions Worth Knowing

Magnesium can interfere with the absorption of certain medications, including some antibiotics and thyroid medication, which is why timing between doses sometimes matters.

Kidney function is the more important consideration. Kidneys regulate magnesium levels, so anyone with reduced kidney function should not supplement without medical guidance. This is not a theoretical caution.

Food First Is Not a Platitude

Leafy greens, pumpkin seeds, almonds, black beans, and whole grains all contribute meaningful magnesium.

Food delivers it alongside fiber, potassium, and other nutrients that work together, and it comes without the dosing and interaction questions a supplement introduces. That does not make supplementation wrong. It makes it a second step rather than a first one.

When It Is Worth Raising

Bring magnesium up specifically if you take medications that affect it, have a digestive condition, have poorly controlled blood sugar, or are already taking a supplement and are not sure whether it is the right form or dose.

"People bring me a bottle and ask if it is good," says Dr. Don Colbert, M.D. "The better question is what they were hoping it would do, because that usually tells us whether magnesium was ever the right answer."

It Is Not the Explanation for Everything

Fatigue, muscle cramps, poor sleep, and low mood all appear on lists of possible low-magnesium symptoms. They also appear on the list for thyroid disease, iron deficiency, sleep apnea, and several other conditions.

Treating a supplement as the answer while leaving those unexamined is how people spend a year feeling no different. A broader evaluation puts magnesium in its proper place rather than making it carry the whole load.

Frequently Asked Questions

Should I take magnesium at night?

Many people prefer evening dosing, and some forms are commonly taken then. Whether timing makes a practical difference for you depends on the form, your reason for taking it, and any medications that need separating, so it is worth asking rather than assuming.

Can you take too much magnesium?

Yes. Excess intake from supplements commonly causes digestive upset, and in people with reduced kidney function it can become more serious. Magnesium from food is handled differently by the body than large supplemental doses.

Which form should I buy?

That depends on why you are taking it, how well you absorb nutrients, and what else you take. Rather than choosing from a shelf, bring your goal and your current medication list to your appointment so the choice can be matched to your situation.

Ask Before You Add It

Supplements are easy to start and easy to keep taking without ever knowing whether they helped.

Patients visit our Southlake office from across the Dallas Fort Worth area, and our Lake Mary office from throughout Central Florida.

Schedule a consultation with Colbert Institute of Anti-Aging and review what you are actually taking.

Should You Get Your Vitamin D Tested Before Winter?

Testing before supplementing is the more useful order, because the right dose depends entirely on where your level actually sits. Most people do it backwards: they start a supplement, never check a level, and never find out whether it worked.

October is a practical time to raise this, since sun exposure declines through fall and winter for most of us.

At Colbert Institute of Anti-Aging in Southlake, Texas and Lake Mary, Florida, supplementation follows testing rather than replacing it.

Why Winter Changes Things

Skin produces vitamin D in response to sunlight, and that production depends on the angle of the sun, the time of day, how much skin is exposed, and skin pigmentation.

Through the darker months, days are shorter, more of the body is covered, and more time is spent indoors. For many people that means less production during exactly the stretch when it would be most useful.

What Vitamin D Is Involved In

Its best known role is calcium absorption and bone health, which is why it comes up constantly in conversations about bone density and menopause.

It is also involved in immune function, muscle function, and mood regulation. That breadth is precisely why deficiency symptoms are so vague and so easily attributed to something else.

Why Symptoms Are a Poor Guide

Low vitamin D can contribute to fatigue, muscle aches, low mood, and frequent illness.

Every one of those has a dozen other possible explanations, including thyroid problems, iron deficiency, sleep disorders, and depression. You cannot reasonably diagnose a vitamin D problem by how you feel, which is another argument for measuring rather than guessing.

What Affects How Much You Need

• Your starting level, which varies enormously between individuals
• Body weight, since vitamin D is stored in fat tissue
• Digestive conditions that affect absorption of fat soluble vitamins
• Certain medications that interfere with vitamin D metabolism
• Skin pigmentation and how much sun you actually get

Two people can take the same dose and end up in very different places, which is exactly why a standard recommendation cannot substitute for knowing your own number.

More Is Not Better

Vitamin D is fat soluble, so it accumulates in the body rather than being flushed out the way water soluble vitamins are.

Excessive intake over time can raise calcium levels and cause real problems. This is not a reason to avoid supplementation, it is a reason not to escalate a dose on your own based on how you feel or on something you read.

The Step Almost Everyone Skips

Retesting is the part that gets forgotten.

Without a follow up level, you do not know whether the dose you chose was too low, about right, or more than you needed. People take the same supplement for years on the strength of a decision made once with no information, and never find out which of those three it was.

"Testing costs very little compared to years of guessing," says Dr. Don Colbert, M.D. "I would rather know your number than have you take a dose somebody picked from an article."

What to Bring Up at Your Appointment

Come with your current supplement, including the dose and the form, along with anything else you take regularly.

Mention any digestive condition, recent significant weight change, and how much time you actually spend outdoors. All of it affects how the result should be interpreted and what happens next.

It Is One Piece, Not the Whole Answer

Vitamin D is worth checking. It is also not the explanation for everything.

When fatigue or low mood is the concern, it belongs in a broader evaluation that also considers thyroid function, iron status, sleep, and other factors. Correcting one number while leaving the rest unexamined is how people end up feeling no different and concluding that nothing works.

Frequently Asked Questions

How often should vitamin D be retested?

That depends on your starting level, the dose you are taking, and whether you have conditions affecting absorption. A recheck some months after starting or changing a dose is a common approach, and your clinician can set the interval that fits your situation.

Can I get enough vitamin D from food?

Some foods contribute, including fatty fish and fortified products, but food alone often does not close a significant gap. Whether diet is sufficient for you depends on your level, your absorption, and how much sun exposure you get.

Is a higher dose safe if my level is low?

Higher doses are sometimes appropriate for correcting a documented deficiency, and they should be chosen and monitored by a clinician rather than self-selected. The safe dose depends on how low you are, why, and what else is going on medically.

Know Your Number

If you take vitamin D but could not say what your level is, that is worth resolving before winter rather than after it.

Patients visit our Southlake office from across the Dallas Fort Worth area, and our Lake Mary office from throughout Central Florida.

Schedule a consultation with Colbert Institute of Anti-Aging and start with the test.