Dr. Jonathan Leffert

Dr. Jonathan Leffert Jonathan Leffert, MD is a board certified endocrinologist.

He offers thyroid RFA, a nonsurgical and thyroid sparing treatment option for patients with thyroid nodules.

04/13/2026

Metformin: The #1 First-Line Choice for a Reason 💊✨

Why has Metformin remained a staple in diabetes care since the 1980s? As Dr. Leffert explains, it’s because it directly attacks the root cause of Type 2 Diabetes: Insulin Resistance. When your body struggles to use the insulin it produces, glucose stays in the bloodstream instead of fueling your cells. Metformin works at the cellular level to improve that sensitivity, helping your body function the way it should.

Beyond blood sugar, Metformin is a "utilitarian" powerhouse:

❤Heart Health: Early clinical studies suggest potential cardiovascular benefits when used early in treatment.

❤PCOS Management: It is a vital tool for those with Polycystic Ovarian Syndrome to manage insulin resistance.

❤Proven Reliability: With decades of data, it remains one of the most consistent and effective early treatments available.

Understanding how your medication works is the first step toward taking control of your metabolic health.

Partner with a team that puts your clinical health first. Contact our office today!
North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/10/2026

Stop Guessing. Start Seeing with CGM. 📈🛡️

A Continuous Glucose Monitor (CGM) provides more than just data—it provides a real-time window into how your body functions. As Dr. Leffert explains, this technology is an essential resource for achieving true clinical control of diabetes.

Why a CGM is a game-changer:

📈Immediate Feedback: See exactly how your blood sugar reacts to specific meals—from high-carb dishes to protein and vegetables.

📈Insulin Precision: Better manage carbohydrate counting and sliding scales by seeing exactly how your insulin is working throughout the day.

📈Life-Saving Alarms: For those with hypoglycemia unawareness, a CGM provides critical alerts for low blood sugar, especially during the night when you may not feel the symptoms.

Whether you're managing Type 1 or Type 2 diabetes, a CGM takes the mystery out of your treatment plan and replaces it with actionable, clinical information.

Partner with a team that puts your clinical health first. Contact our office today!

North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/09/2026

Is it time to trade your finger sticks for a CGM? 🩺📈

Continuous Glucose Monitors (CGMs) have moved into the mainstream for a reason. For years, we only had "point in time" data to manage diabetes, but now we have a real-time movie of your metabolic health.

How a CGM empowers your care:

📈Constant Monitoring: Your sensor records glucose every five minutes.

📈Direct to Phone: Access your data instantly via a mobile app.

📈Identify Patterns: Helps your physician identify trends and fine-tune your treatment using weeks of recorded data rather than a single "pop quiz."

Take the mystery out of your diabetes management and get the full picture of your health.

Partner with a team that puts your clinical health first. Contact our office today!

North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/06/2026

GPA vs. Pop Quiz: Understanding Your Diabetes Numbers 🎓📝

Ever feel confused by the difference between your daily finger sticks and your 3-month A1c? Dr. Leffert uses a simple analogy to clear it up:

🍎Hemoglobin A1c = Your GPA. This is your grade point average over several months. It gives us the "big picture" of your progress and is the gold standard for predicting long-term health and preventing complications.

🍎Daily Blood Sugar = A Pop Quiz. This is a single score at one specific moment. It is important for day-to-day adjustments, but it can change rapidly based on what you ate, your stress levels, or even a quick workout.

Both numbers are vital tools in your diabetes toolkit, but they tell us different things. Whether we are looking at your long-term average or a moment-in-time "quiz," the goal is the same: providing the data needed to make the best decisions for your health.

Expert Care for Your Metabolic Health
If you need help navigating your diabetes numbers and finding a treatment plan that works for your life, we are here to help.

North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/03/2026

Is your A1c goal set in stone? Not necessarily. 🩺

One of the most important aspects of diabetes management is understanding that targets are individualized. As Dr. Leffert explains, a "healthy" number for one person might be risky for another.

While a younger, healthy individual might aim for an A1c of 6.5% to 7.0%, an older patient may require a higher target. Why? Because the clinical risk of hypoglycemia (dangerously low blood sugar) often outweighs the benefits of a lower number in certain life stages or clinical situations.

A1c vs. Finger Sticks: What’s the Difference?

👉Finger Sticks: These are a "point in time." Your blood sugar changes rapidly based on exercise, what you ate, or even if you have a minor infection.

👉Hemoglobin A1c: This is your "big picture." It documents your average control over three months, showing whether your treatment plan is actually making progress over time.

Both numbers are important tools in your kit, but they function in different ways to help your endocrinologist provide the safest, most effective care for your specific needs.

Start your New Year with a team that puts your health first. Contact our office today!
North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/03/2026

Why is 7% the magic number for so many people living with diabetes? 📉

As Dr. Leffert explains, the Hemoglobin A1c isn’t just a random target—it is the clinical "yardstick" used in every major medical study to define what "controlled" diabetes actually looks like. Whether you are Type 1 or Type 2, using a pump or taking oral medication, the A1c is how we measure your protection against long-term complications.

Maintaining an A1c in a healthy range (usually 7% or below for many individuals) significantly lowers the risk of:
👁️ Retinopathy (Eye disease)
🧪 Nephropathy (Kidney disease)
👣 Neuropathy (Nerve damage in the feet)
❤️ Heart Disease

In the world of endocrinology, we don't just look at numbers for the sake of the chart—we look at them to protect your future health.

Start your New Year with a team that puts your health first. Contact our office today!
North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/02/2026

If your A1c is 7.0 but your fasting blood sugar is 150, are you actually doing okay? 🩺

Dr. Jonathan Leffert breaks down why the Hemoglobin A1c is considered the "gold standard" for diabetes management. While a finger stick gives you a "point in time" look at your glucose, the A1c measures the average amount of glucose on your red blood cells over their 120-day lifespan.

Why is this average so important? Because years of clinical research show that maintaining a target A1c is the best way to protect your body from long-term complications like eye disease, kidney disease, and heart disease.

Understanding your 3-month average is the first step toward true metabolic control.

Need diabetes guidance from a team that puts your health first? Contact our office today!
North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

Have you checked out Dr. Leffert’s YouTube channel lately? 📺✨This channel is your go-to resource for clear, evidence-bas...
03/31/2026

Have you checked out Dr. Leffert’s YouTube channel lately? 📺✨

This channel is your go-to resource for clear, evidence-based information on thyroid and metabolic health. Dr. Jonathan Leffert’s mission is to bridge the gap between complex medical research and patient understanding, stripping away the confusing jargon to provide "layperson-friendly" insights.

From the latest breakthroughs in non-surgical treatments like Thyroid RFA and new therapies for hypoparathyroidism to explaining the "revved-up" engine of hyperthyroidism, the channel is designed to empower you. By sharing updates from major medical conferences like NASIT and discussing the ethics of shared decision-making, Dr. Leffert ensures you have the knowledge needed to advocate for your own health and have better conversations with your medical team.

Head over to YouTube and search for "Dr. Leffert | Thyroid RFA Dallas" to subscribe and never miss an update!

Need guidance for your endocrine health? Contact our office today!
North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

03/30/2026

Did your thyroid medication suddenly change color or shape? 💊

It is a common scenario: you pick up your refill, and the pill looks different. While the dose on the bottle might be exactly what you’ve always taken, your pharmacy may have switched manufacturers.

Why does this matter?
Even though the active ingredient remains the same, different manufacturers use different fillers and binders (excipients). For many patients, these subtle changes can affect how your body absorbs the medication, potentially causing your thyroid levels to fluctuate—even though your dose hasn't changed.

Dr. Leffert’s Tip: Always look at your bottle and your pills when you pick up a refill. If you notice a change in the manufacturer, color, or shape, keep an eye on how you feel and let your endocrinologist know if you start experiencing new or returning symptoms.

Start your New Year with a team that puts your health first. Contact our office today!
North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

Is your thyroid "revved up" 24/7? 🏎️🔥Hyperthyroidism can feel like a fire has been lit under your metabolism, leaving yo...
03/27/2026

Is your thyroid "revved up" 24/7? 🏎️🔥

Hyperthyroidism can feel like a fire has been lit under your metabolism, leaving you anxious, exhausted, and struggling with a racing heart. But treating it isn't a one-size-fits-all process.

As Dr. Leffert explains, the first step to feeling better is identifying the source of the overactivity. Is it an autoimmune response affecting the whole gland (Graves' Disease), or is it a single "toxic" nodule acting on its own?

Understanding this distinction is the key to protecting your long-term health—especially your heart and your bones.

In this post, we’re breaking down:
✅ The common symptoms of an overactive thyroid.
✅ How we differentiate between Graves’ and toxic nodules.
✅ The long-term risks of leaving hyperthyroidism unmanaged.

Don't let an "idling" engine wear you down. Whether you need medical management or a non-surgical procedure to target a specific nodule, our goal is shared decision-making that puts your health goals first.

Need Guidance on treatments for hyperthyroidism? Contact our office today!
North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

Address

NORTH TEXAS ENDOCRINE CENTER: Carrell Clinic Center, Tower II, 9301 North Central Expressway, Suite 570
Dallas, TX
75231

Opening Hours

Monday 8am - 4:30pm
Tuesday 8am - 4:30pm
Wednesday 8am - 4:30pm
Thursday 8am - 4:30pm
Friday 8am - 4:30pm

Telephone

+12143695992

Website

Alerts

Be the first to know and let us send you an email when Dr. Jonathan Leffert posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Shortcuts

Featured

Share

Share on Facebook Share on Twitter Share on LinkedIn
Share on Pinterest Share on Reddit Share via Email
Share on WhatsApp Share on Instagram Share on Telegram

Category