By Hana Lindqvist, MS, RDN, Registered Dietitian Nutritionist. Medically reviewed by Dr. Thomas Beale, DO, Board-Certified Family Medicine.
Last spring, a woman named Carla in Birmingham, Alabama, sat across from her dietitian with a food diary that told a familiar story. She'd swapped her two daily Cokes for two tall glasses of homemade sweet tea, figuring it was "at least natural." Her sugar intake had barely budged. "I was putting four tablespoons per glass," she said. "I did the math later. That's 192 calories and 48 grams of sugar. A can of Coke is 140 and 39." She laughed about it, but the numbers stung. She'd been on compounded tirzepatide for three weeks, watching her appetite shrink, and still undermining the medication with liquid sugar she thought was the healthier option.
The boring truth: sweet tea and soda are closer to twins than rivals. But the details matter, and they matter more when someone is using a GLP-1 medication to lose weight.
This article is part of the FormBlends ultimate guide to compounded tirzepatide and the GLP-1 Diet & Food hub.
The Short Answer
A 16-ounce glass of restaurant-style sweet tea typically contains 30 to 50 grams of added sugar. A 12-ounce can of Coca-Cola has 39 grams. Sweet tea has trace polyphenols from the tea leaves, and it lacks phosphoric acid and caramel coloring. Those are real but marginal advantages. If the question is "which one will sabotage my blood sugar and calorie goals less," neither wins in a meaningful way.
Here's the thing: the question itself reveals something useful. People asking "is sweet tea better than soda" are usually looking for permission to keep drinking one of them. And if you're on a GLP-1 receptor agonist, that's worth examining honestly, because sugar-sweetened beverages are the single easiest calorie source to eliminate without feeling deprived. The medication is already suppressing appetite. Liquid calories don't trigger the same satiety signals that solid food does. Cutting them is low-hanging fruit.
What Happens in Your Body When You Drink Either One
Both sweet tea and soda deliver a concentrated glucose load with essentially zero fiber, fat, or protein to slow absorption. The result: a rapid spike in blood glucose, a surge of insulin, and for many people, a rebound dip that triggers more cravings 90 minutes later.
GLP-1 receptor agonists like tirzepatide work by mimicking the incretin hormone GLP-1. They slow gastric emptying, suppress glucagon release, enhance glucose-dependent insulin secretion, and act on appetite centers in the brain. When you pour 40-plus grams of sugar into that system, you're essentially asking the medication to clean up a mess you didn't need to make. It will still work. But you're blunting its efficiency, like driving with the parking brake half-engaged.
The tea polyphenols (catechins, theaflavins) do have some evidence behind them for antioxidant and anti-inflammatory effects. But the concentrations in a brewed sweet tea are modest, and whatever benefit they offer gets overwhelmed by the metabolic cost of the added sugar. Unsweetened tea is a different conversation entirely. That one's genuinely useful.
A Scenario Worth Walking Through
Consider someone in their late 30s starting compounded tirzepatide for obesity, no diabetes, no history of pancreatitis or gallbladder disease. Starting dose is 2.5 mg weekly. The pharmacy ships 10 mg/mL vials. The patient uses a U-100 0.3 mL syringe.
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Try the BMI Calculator →The first month is about routine: picking an injection day, learning technique, hydrating deliberately, managing early satiety. No dose change yet.
At week four, a follow-up visit. Side effects have been mild (some nausea the first two days after injection, resolved by day three). The plan is to escalate to 5 mg weekly.
Now the dietary picture comes into focus. The patient reports drinking two to three glasses of sweet tea daily, totaling roughly 300 to 450 calories and 75 to 115 grams of sugar per day from beverages alone. That's a quarter of most people's calorie budget, and it's doing nothing to help with satiety. In fact, it's probably worsening the mild nausea, because concentrated sugar on a slower-emptying stomach tends to ferment and sit poorly.
The simplest intervention with the highest return: swap to unsweetened tea (or water with lemon, or sparkling water) and recapture those 300-plus calories for actual food. Protein, specifically, which protects lean mass during weight loss, something the SURMOUNT-3 trial (Wadden et al., Nat Med 2023) highlighted by evaluating tirzepatide following a 12-week intensive lifestyle intervention lead-in.
What the Trials Actually Tell Us About Beverage Choices
The major GLP-1 trials didn't directly compare sweet tea to soda. They did, however, operate within structured dietary interventions that universally recommended minimizing sugar-sweetened beverages.
STEP 1 (Wilding et al., NEJM 2021) evaluated semaglutide 2.4 mg weekly in adults with obesity over 68 weeks. The dietary guidance component included reducing caloric beverages. STEP 5 (Garvey et al., Nat Med 2022) extended semaglutide evaluation to 104 weeks with similar nutritional scaffolding.
Trial averages are exactly that: averages. Individual results varied substantially. SURMOUNT-1, for example, reported wide distributions within the same dose arm, which is the normal pattern across GLP-1 studies. But one pattern held consistently: participants who adopted the lifestyle modifications alongside the medication did better than those who relied on pharmacology alone.
Liquid sugar is the lifestyle factor most amenable to a clean swap. It costs nothing to change, it doesn't require cooking or meal prep, and GLP-1 medications already reduce cravings that might otherwise make the switch difficult.
Related reading in this cluster
When the Answer Changes Slightly
There are a few scenarios where sweet tea edges ahead of soda by a small but real margin:
If you're choosing between the two and won't accept water. Sweet tea brewed at home can be made with much less sugar than the commercial version. Two teaspoons per 16 ounces instead of four tablespoons changes the math dramatically: about 30 calories instead of 190. You also get the polyphenols. A lightly sweetened home-brewed tea is genuinely preferable to a can of Coke.
If reflux is a factor. Soda's carbonation and acidity can worsen gastroesophageal reflux, which is already more common on GLP-1 medications because of delayed gastric emptying. Non-carbonated sweet tea is gentler on the esophageal sphincter.
If the alternative is diet soda. This is where it gets murkier. Artificial sweeteners don't spike blood glucose the way sugar does, but the data on their long-term metabolic effects is mixed, and some patients on GLP-1s report that diet soda worsens their GI symptoms. Unsweetened tea sidesteps both problems.
The honest assessment: if you're on tirzepatide or semaglutide and still drinking calories, you're leaving the easiest win on the table. Sweet tea is not "better than soda" in any way that matters for weight loss or metabolic health. It's the same problem wearing a different outfit.
The Follow-Up That Produces Results
Follow-up is where the long-term outcome actually gets built. Routine touchpoints typically occur every four weeks during the first three months, then every two to three months once a stable dose is reached.
Each visit covers tolerability, adherence, lifestyle inputs (nutrition, resistance training, sleep), and signs that the plan needs adjustment. This isn't a formality. It's the venue for course correction. The beverage conversation, for instance, might surface at visit two or three, once the patient has adapted to the medication and is ready to optimize.
Across the GLP-1 class, the strongest predictor of long-term outcome is months on therapy at or near the maintenance dose. Everything else, including the sweet-tea-versus-soda question, matters less than that. But the small decisions compound. A patient who eliminates 300 daily beverage calories at month one has avoided roughly 27,000 excess calories by month three. That's not trivial.
Related reading from adjacent topics
- Evaluating Compounded GLP-1 Telehealth Programs: A Buyer Framework (Deep-Dive)
- Does tirzepatide stop working?
Frequently Asked Questions
Is sweet tea healthier than soda overall? Marginally, if at all. The tea polyphenols are real but don't offset the metabolic impact of 30 to 50 grams of added sugar per serving. Unsweetened tea is the version that's genuinely healthier.
Should I discuss my beverage habits with my prescriber? Yes. Any caloric intake pattern that affects your weight loss trajectory or GI tolerance on a GLP-1 medication is worth mentioning. Prescribers can't optimize a plan they can't see.
What if I can't give up sweetened drinks entirely? Gradual reduction works. Cut the sugar in your tea by half this week, then halve it again in two weeks. Many patients on GLP-1 medications find their palate shifts naturally as cravings diminish.
How often will the guidance here change? The underlying physiology of sugar metabolism and the foundational trial data are stable. Coverage, pricing, and regulatory specifics shift more often. Confirm anything time-sensitive with a current source.
Is compounded tirzepatide FDA-approved? No. Compounded tirzepatide is not an FDA-approved drug. The FDA does not review compounded medications for safety, effectiveness, or quality prior to dispensing. Compounded medications are dispensed under personalized prescriptions through state-licensed pharmacies when a prescriber determines a personalized formulation is clinically appropriate.
What's the best drink to have on a GLP-1 medication? Water. Followed by unsweetened tea, black coffee, and sparkling water. Boring answer, but it's the correct one.
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Important Safety Information
This article is for educational purposes only and is not medical advice. Compounded tirzepatide and compounded semaglutide are not FDA-approved drugs. The FDA does not review compounded medications for safety, effectiveness, or quality before they are sold. Compounded medications should only be used when a licensed prescriber determines a personalized formulation is clinically appropriate. Do not start, stop, or modify any prescription medication without speaking with a licensed healthcare provider. If you experience symptoms of a serious reaction, including severe abdominal pain, signs of pancreatitis, vision changes, persistent vomiting, signs of an allergic reaction, or thoughts of self-harm, seek emergency care immediately.
FormBlends sells only compounded semaglutide and compounded tirzepatide through licensed U.S. pharmacies after a telehealth evaluation by an independent prescriber. Eligibility, pricing, and formulation are determined on a case-by-case basis.
About This Article
Written by Hana Lindqvist, MS, RDN (Registered Dietitian Nutritionist). Medically reviewed by Dr. Thomas Beale, DO (Board-Certified Family Medicine). FormBlends content is reviewed by licensed U.S. clinicians prior to publication. The clinical decisions described above are general education only and should not replace individualized advice from your own healthcare provider.