Mainstay exists for one reason: most of what's marketed to people on GLP-1 medications is a product first and an explanation a distant second. We think it should be the other way around.
We started with the thing we thought was missing most: a genuinely useful, honestly written guide covering the questions that actually come up once you're on treatment — how much protein you really need, why hydration matters more than it used to, what to do about digestion changes, how to keep some strength training in your week, and how to navigate eating out without it being stressful.
Everything we publish is sourced. When the research is mixed or evolving, we say so, rather than picking the version that sounds better in an ad. We don't use before-and-after photos, we don't promise outcomes, and we don't think there's anything shameful about needing support while your body adjusts to a new medication.
Mainstay is not a replacement for your prescriber, a registered dietitian, or any part of your care team — think of us as the steady, practical layer underneath all of that.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Why the products in our shop carry different brand names
Mainstay is a curated shop, not a manufacturer. The protein blends come from Meal Boosters, the electrolytes from Potion Hydration, the magnesium from Upgraded Formulas. We think that's a feature, not a compromise: instead of white-labeling whatever is cheapest and putting our logo on it, we look for products that already do one thing well and fit the realities of a changed appetite.
How we choose what we stock
Every product in the shop has to clear the same bar: meaningful protein or nutrients in servings small enough to actually finish, savory options for people experiencing sweet fatigue, ingredients lists we're comfortable explaining line by line, and a full FDA-compliant label. If something stops meeting that bar, we stop stocking it.
We earn our margin by doing the filtering, the education, and the support - so you don't have to research this category alone at 11pm.