Supplements and GLP-1s in 2026: Half of Patients Are Buying Them — What Helps, What's Hype

The numbers behind the trend are striking. About 10 million Americans used GLP-1 medications last year, a figure JPMorgan researchers project could reach 25 million by 2030. According to a Nutrition Business Journal survey cited by Reuters, nearly half of GLP-1 users began taking new supplements after starting the drugs, with probiotics, protein, and fiber the most popular picks. A separate Boston Consulting Group survey found GLP-1 users spend roughly 20% more on protein, fiber, and collagen than they did before starting treatment.

The supplement industry has noticed. U.S. supplement sales topped $74 billion in 2025, and TikTok Shop alone generated over $1 billion of those sales. Patients interviewed by Reuters described spending between $110 and $300 per month on supplement routines — none of it covered by insurance.

The demand is driven by something real. GLP-1 medications slow digestion and reduce appetite, and common side effects include nausea, constipation, fatigue, and — because patients simply eat much less — the risk of falling short on protein, fiber, and micronutrients. Some patients also report brittle nails or hair shedding during rapid weight loss.

These effects are usually most intense during the first months of treatment and during dose increases, and most fade as the body adjusts. But when you feel rough and an influencer with thousands of followers says a $60 powder fixed the same problem, the appeal is obvious. The trouble is that "it worked for me" marketing is not evidence, and as one Stanford physician told Reuters, when a product does not go through FDA preapproval, "if you can't know what you're taking, it's hard to know what risks you're undergoing."

Not everything patients are buying is hype. Three basics are commonly recommended by clinicians during GLP-1 treatment, and they align with what the medical literature supports.

Protein matters because rapid weight loss includes some lean muscle loss, and eating enough protein (along with resistance exercise) helps preserve it. For many patients that is achievable through food, but a protein shake can be a practical tool when appetite is low. Fiber — from food first, or a simple psyllium supplement — can ease the constipation that GLP-1s commonly cause. And plain hydration helps with fatigue, headaches, and constipation alike; most people do not need pricey electrolyte formulas unless they are losing fluids from vomiting or diarrhea, in which case they should be talking to their provider anyway.

The key difference: these are cheap, boring, well-understood tools — not proprietary blends promising to "boost" or "mimic" your medication.

The Reuters reporting highlights the other side of the market: products with aggressive claims and little verification. Because dietary supplements do not require FDA approval before they are sold, their actual contents can be hard to verify. Experts interviewed described two recurring problems: products spiked with undeclared drugs, and products containing only trace amounts of the ingredients on the label. One supplement-industry CEO was blunt about the marketing machine, telling Reuters that companies "can hire an influencer, or even hundreds of influencers on TikTok... to make whatever claims will sell."

Regulators are responding. The Department of Health and Human Services has proposed tightening the rules, including eliminating the pathway that lets companies self-declare ingredients as "generally recognized as safe" without notifying the FDA, and the agency has stepped up oversight of new dietary ingredients. But none of that changes what is on shelves today. Red flags to watch for: anything marketed as a "natural GLP-1" or "GLP-1 booster," blends that will not disclose exact doses, and products sold mainly through influencer videos rather than pharmacies. Independent of the supplement question, researchers are still mapping the full side-effect picture of GLP-1s themselves, which is one more reason to keep a licensed provider in the loop rather than self-treating.

Here is the part the supplement ads leave out: the most effective tools for GLP-1 side effects are not sold on TikTok. If nausea is making treatment hard to tolerate, a provider can slow your dose titration, adjust your injection timing, or prescribe anti-nausea medication that actually targets the problem. Persistent vomiting, severe abdominal pain, or signs of dehydration are reasons to contact a provider promptly, not to buy another powder.

That is also why GLP-1 treatment works best as managed care rather than a do-it-yourself project. A licensed provider can screen you before starting — GLP-1s are not appropriate for people with a personal or family history of medullary thyroid cancer or MEN 2, for example — check how any supplement might interact with your other medications, and adjust your plan when side effects show up. If you are already spending $200 a month on supplements to make your medication tolerable, that is a conversation worth having with a clinician, not a comment section.

JoeyMed's medical weight loss program pairs GLP-1 treatment — including tirzepatide — with a licensed provider who manages your dosing, monitors side effects, and can prescribe anti-nausea support when you need it, all through telehealth. Instead of piecing together advice from influencers, you get a plan built around your health history and real follow-up when something feels off. Results and side effects vary from person to person, and every treatment decision is made with your provider. Start with a free online visit at joeymed.com/weight-loss and get an answer, usually within a day.