Liquid I.V. Hydration Multiplier review: depends on the person

We’d buy Liquid I.V. for occasional use when you want a familiar electrolyte stick you can find almost anywhere. We’d leave it if you’re watching sugar or you want a cleaner label. The absorption idea is real, the marketing overstates it, and added sugar changes who it’s for.

Quick answer

Around 500mg of sodium per stick (varying roughly 490–630mg by flavor), delivered alongside real sugar that drives absorption. The mechanism is genuine. The “equivalent to drinking multiple bottles of water” style of claim is not something to take literally.

The mechanism is real

Liquid I.V. is built on oral rehydration therapy — the same principle behind the WHO’s rehydration solutions, which have saved an enormous number of lives treating dehydration from illness.

The underlying biology: the sodium-glucose cotransporter in the small intestine moves sodium and glucose together, and water follows osmotically. Having glucose present genuinely does increase the rate at which sodium and water are absorbed compared with water alone.

That is real science, and it is why the sugar is in there rather than being a lazy sweetener choice.

Where the marketing outruns the science

Oral rehydration therapy is most valuable when someone is actually dehydrated — from illness, heavy sweating, or fluid loss. In that context, faster absorption matters a great deal.

For a normally hydrated person drinking it at a desk, faster absorption of water they did not need is not a meaningful benefit. The mechanism is real; the everyday application is thinner than the branding suggests.

Claims framed as equivalence to several bottles of water describe absorption efficiency under specific conditions, not a multiplication of the water you drank. You are drinking one glass of water.

The sugar question

Each stick contains real added sugar — around 11g in the original formulation. That is deliberate and mechanistically necessary, not an oversight.

It also means this is not calorically free, and if you drink several a day the sugar accumulates. Anyone limiting sugar should look at LMNT or Cure instead, both of which avoid it, accepting slower absorption in exchange.

Sugar-free variants exist, and it is worth understanding that removing the sugar also removes the cotransporter mechanism that distinguished the product in the first place.

Sodium in context

At roughly 500mg, Liquid I.V. sits in the middle of the category — half of LMNT’s 1,000mg, more than a typical tablet. For most people that is a sensible amount, and it is one reason the product suits a broader audience than the high-sodium brands.

Content varies by flavor, so check the label if the exact number matters to you.

Where it genuinely shines

Illness. Vomiting, diarrhoea, fever — this is oral rehydration therapy working as intended, and it is the strongest use case by a distance.

Hangovers. Same reasoning: real fluid loss to replace.

Heavy sweating, particularly in heat.

Travel. Long flights, unfamiliar climates, disrupted routine.

Availability. It is in essentially every pharmacy and supermarket, which is worth something when you need it unexpectedly.

Who should buy it

Anyone who wants a genuinely effective rehydration product for illness, hangovers, or heavy sweating, and does not mind the sugar. The convenience and availability are real advantages.

Who should skip it

Skip it if you are limiting sugar. Skip it as an everyday desk drink — water is doing that job. And skip it if you want the highest sodium content for heavy sweating or low-carb eating, where LMNT is better matched.

Final verdict

Good, but not essential — with the important caveat that it is genuinely excellent for the narrow situations it was designed around. Buy it for the sick day, the hangover, and the hot hike. Do not buy the everyday-hydration framing.

See our best electrolyte powders guide.