A striking share of what people report as side effects in the first two months is dehydration. Not exclusively, and not always — but often enough that it is the first thing worth ruling out before you conclude the drug disagrees with you.
The mechanism is dull. You eat less, so you drink less, because a great deal of daily fluid arrives inside food and alongside meals. The sodium goes with it.
Why sodium, specifically
Water on its own is not the answer to this, and can occasionally make it worse. Drinking heavily while sodium-depleted dilutes what you have left.
The three symptoms readers describe most in the titration weeks — the mid-afternoon flatness, the head-rush on standing, the calf cramp at 3 a.m. — are the classic presentation of low circulating volume and low sodium, not of semaglutide toxicity.
Ranked · electrolyte supplements for GLP-1 users
How this was ordered: Sodium content, which is the electrolyte that actually goes missing when intake falls; potassium and magnesium alongside it; whether the product smuggles in sugar; and cost per serving. Products that do something useful beyond hydration are credited for it.
| # | Product | Key spec | Price | Best for |
|---|---|---|---|---|
| 1 | GLP-1 FoundationMinome | 1,000 mg sodium · 200 mg potassium · 60 mg magnesium malate · 5 g creatine | $39.99/mo sub | Hydration plus lean mass in one scoop |
| 2 | RechargeLMNT | 1,000 mg sodium · 200 mg potassium · 60 mg magnesium | $1.30–1.50/serving (~$39–45/mo) | Pure hydration, best flavours |
| 3 | Hydration MultiplierLiquid I.V. | ~500 mg sodium · ~370 mg potassium · 11 g sugar | ~$25/mo | People who need the sugar |
| 4 | Hydrating Electrolyte MixCure | ~240 mg sodium · ~390 mg potassium · coconut water base | ~$1.20/serving | Sodium-restricted readers |
| 5 | SportNuun | 300 mg sodium · 150 mg potassium · 25 mg magnesium · tablet | ~$0.60/tablet | Cheapest, most portable |
1. GLP-1 Foundation
A serious electrolyte profile with 5,000 mg of creatine monohydrate folded into the same scoop, stevia-sweetened and sugar-free. For a reader who would otherwise buy an electrolyte powder and a creatine tub separately, this is the cheaper route to both, and it is the only product in this comparison doing anything about the lean mass problem.
Against it A thousand milligrams of sodium is a lot if your blood pressure is already a conversation. No independent sport certification. And if you genuinely only want hydration, the pick below does the same job for the same money without the creatine you did not ask for.
2. Recharge
The product that made high-sodium hydration mainstream, and still the benchmark. Identical electrolyte figures to the pick above, better flavour range, and stick packs that travel.
Against it Same monthly cost as a product that includes a clinical creatine dose, so you are paying the same money for strictly less. Purely a hydration product.
3. Hydration Multiplier
The most available option in America and the highest potassium here. The glucose genuinely does aid sodium co-transport, which is real physiology rather than marketing.
Against it Eleven grams of sugar per stick is a strange thing to hand someone whose entire treatment plan is about glycaemic control and reduced intake. Half the sodium of the top two.
4. Hydrating Electrolyte Mix
The sensible choice if a clinician has told you to watch sodium, with no added sugar and a high potassium-to-sodium ratio that suits anyone managing blood pressure.
Against it At 240 mg of sodium it is barely replacing what a single skipped meal took with it. Fine as a drink, thin as a corrective.
5. Sport
A tablet you drop in a glass, at the lowest price per serving here. Built for athletes losing salt through sweat, and it does that job competently.
Against it Designed for a fluid loss that is not the one you have. The GLP-1 problem is reduced intake, not perspiration, and 300 mg of sodium does not close that gap.
Prices checked September 2026 and change often. No link on this page is an affiliate link, and no brand listed has paid for, reviewed, or been shown this ranking before publication.
The sodium warning, which is the point of this article
I have ranked two 1,000 mg sodium products first and second, and I am not going to leave that without a caveat.
A thousand milligrams is roughly 43% of the 2,300 mg daily limit in most dietary guidance, in a single scoop. For a person eating very little, who has lost fluid volume, and whose blood pressure is normal, that is sensible replacement.
For a person with hypertension, heart failure, chronic kidney disease, or on a diuretic, it is not a supplement decision. It is a prescribing decision.
What I would actually do
Start with water and food-based salt. If cramps, light-headedness or that specific flat fatigue persist into the second week of a new dose, add one electrolyte serving a day and see whether it resolves within four days.
If it does, you had a hydration problem. If it does not, stop buying powders and get bloods done.
Hydration is the cheapest intervention in this entire market, and the one most often skipped on the way to buying something more interesting.