Short answer: Our pick is Fire Salt Hydration + Caffeine. It pairs 100 mg of caffeine, about a cup of coffee, with a full sweat electrolyte: 670 mg sodium, 190 mg potassium, 90 mg magnesium and coconut water, zero sugar, for about $1.41 a stick. Most caffeinated mixes are energy drinks with some electrolytes. This one is an electrolyte with a real dose of caffeine. If you specifically want L-theanine, Hydrant and Liquid I.V. include it.
Fire Salt publishes this guide, and we rank our own stick first. Specs and prices below come from each brand's own website as of October 8, 2026.
The rankings
- Best overall: Fire Salt Hydration + Caffeine. 100 mg caffeine, 670 mg sodium, 90 mg magnesium, coconut water, zero sugar.
- If you want L-theanine and green tea: Hydrant Energy.
- If you want added vitamins: Liquid I.V. Sugar-Free Energy Multiplier.
- If you want it fizzy: Zipfizz.
- If you want half the caffeine: LMNT Lemonade Iced Tea.
Caffeinated electrolyte mixes compared
| Fire Salt Hydration + Caffeine (Our pick) | Hydrant Energy | Liquid I.V. Sugar-Free Energy Multiplier | Zipfizz Energy Drink Mix | LMNT Lemonade Iced Tea | |
|---|---|---|---|---|---|
| Caffeine | 100 mg | 100 mg | ~100 mg | 100 mg | 50 mg |
| Caffeine source | Caffeine anhydrous | Green tea | "Natural caffeine" | "Natural caffeine" (green tea leaf extract, guarana listed) | Black tea |
| Sodium | 670 mg | 260 mg | 955 mg total electrolytes (sodium not listed separately on page) | 1,125 mg total electrolytes (sodium not listed separately on page) | 1,000 mg |
| Potassium | 190 mg | 200 mg | (in total) | (in total) | 200 mg |
| Magnesium | 90 mg | 30 mg | "Excellent source" | (in total) | 60 mg |
| Coconut water | Yes | No | No | No | No |
| Extras | — | L-theanine, zinc | L-theanine, B vitamins, vitamin C | Vitamins | — |
| Sugar | 0 g | 0 g | 0 g | 0 g | 0 g |
| Sweetener | Stevia | "No artificial sweeteners," per Hydrant | Allulose | "Plant-based sweeteners" | Stevia |
| Box | 32 sticks, $44.99 | 30 sticks, $39.99 | 14 sticks, $24.99 | 20 sticks, $29.99 | 30 sticks, $45.00 |
| Per stick | ~$1.41 | ~$1.33 | ~$1.79 | ~$1.50 | $1.50 |
Why Fire Salt Hydration + Caffeine is our pick
- A real electrolyte dose, not a sprinkle. 670 mg sodium per stick. That's more than 2.5 times Hydrant Energy's 260 mg.
- 90 mg magnesium. Three times Hydrant's 30 mg and 50% more than LMNT's 60 mg.
- Coconut water powder. None of the others list it.
- 100 mg caffeine. About a cup of coffee. Enough to get you moving, easy to count toward your day.
- Zero sugar, stevia-sweetened. Blue Raspberry or Watermelon.
- Built for work, not a desk. Fire Salt was started by a firefighter. This is the stick for 5 a.m. starts, hot jobsites and long training days when you need salt as much as the lift.
- Good value. About $1.41 a stick, less than Liquid I.V. Sugar-Free Energy, Zipfizz or LMNT on a single box.
- HSA/FSA eligible through Truemed, per Fire Salt. Made in the USA, 30-day money-back guarantee.
Shop: Fire Salt Hydration + Caffeine.
The others, one line each
- Hydrant Energy adds 200 mg L-theanine with green tea caffeine. If you want L-theanine at a low price, it works.
- Liquid I.V. Sugar-Free Energy Multiplier adds L-theanine and B vitamins. If you want vitamins in your caffeine, it works.
- Zipfizz is lightly fizzy with a long vitamin list. If you want fizz, it works.
- LMNT Lemonade Iced Tea has 50 mg caffeine from black tea. If 100 mg is too much, it works. Our full head-to-head is Fire Salt vs LMNT.
Does caffeine cancel out hydration?
No, not at normal amounts. A 2014 study in PLOS One found moderate daily coffee intake hydrated men about as well as the same amount of water. At 100 mg mixed into 16 to 32 oz of water with 670 mg sodium, you're well ahead on fluid and salt.
How much caffeine is too much?
The FDA says 400 mg a day is an amount not generally linked to negative effects in healthy adults. Count everything: coffee, tea, pre-workout, energy drinks. 100 mg per stick makes it easy to keep track. Pregnant people and anyone on certain medications should ask a doctor. Skip caffeine late in the day if it hurts your sleep. Need electrolytes later? Switch to caffeine-free Fire Salt Essential Hydration.
What kind of caffeine is in Fire Salt?
Caffeine anhydrous. That's purified, dried caffeine, the same molecule you get from coffee or tea. "Natural caffeine" on other labels tells you where the caffeine came from, not that it's a different compound. Fire Salt uses a measured 100 mg so every stick is the same.
When to use Fire Salt Hydration + Caffeine
- Start of a shift or early jobsite morning
- Before a training session
- Long drives or long days on your feet
- Afternoon slump, if it's early enough not to hit your sleep
Working shifts? See Hydration and Caffeine for Shift Work.
The bottom line
If you want caffeine and you actually sweat, get both in full doses. Fire Salt Hydration + Caffeine gives you 100 mg caffeine with 670 mg sodium, 90 mg magnesium and coconut water, zero sugar, at about $1.41 a stick. It's our pick for the best electrolyte drink mix with caffeine.
Shop Fire Salt Hydration + Caffeine, or try one in the 6-stick sampler.
Related
Sources: drinkfiresalt.com, drinkhydrant.com, liquid-iv.com and shop.liquid-iv.com, zipfizz.com, drinklmnt.com, all checked October 8, 2026; Killer SC et al., PLOS One, 2014; U.S. FDA, "Spilling the Beans: How Much Caffeine Is Too Much?" Brand names are trademarks of their owners. Fire Salt is not affiliated with them. Fire Salt is not intended to diagnose, treat, cure, or prevent any disease.
Frequently asked questions
What is the best electrolyte drink mix with caffeine?
Our pick is Fire Salt Hydration + Caffeine: 100 mg caffeine with 670 mg sodium, 190 mg potassium, 90 mg magnesium and coconut water, zero sugar, about $1.41 a stick. If you specifically want L-theanine, Hydrant Energy and Liquid I.V. Sugar-Free Energy Multiplier include it.
How much caffeine is in electrolyte energy drink mixes?
Most have about 100 mg per stick, including Fire Salt Hydration + Caffeine, Hydrant Energy, Liquid I.V. Sugar-Free Energy Multiplier and Zipfizz. LMNT Lemonade Iced Tea has 50 mg.
Does caffeine dehydrate you if it's in an electrolyte drink?
Not at moderate amounts. A 2014 PLOS One study found moderate coffee intake hydrated about as well as water. 100 mg of caffeine mixed into 16 to 32 oz of water with 670 mg sodium still leaves you well ahead on fluid.
Which caffeinated electrolyte has more sodium, Fire Salt or Hydrant?
Fire Salt Hydration + Caffeine has 670 mg sodium per stick. Hydrant Energy has 260 mg. Both have 100 mg caffeine.
Is caffeine anhydrous bad?
Caffeine anhydrous is purified, dried caffeine, the same molecule found in coffee and tea. What matters is the dose. The FDA says 400 mg a day is generally not linked to negative effects in healthy adults. Fire Salt uses a measured 100 mg per stick.
Is Fire Salt Caffeine sugar-free?
Yes. Fire Salt Hydration + Caffeine has 0 g sugar and is sweetened with stevia.
How many caffeinated electrolyte sticks can I have a day?
Count every source of caffeine. The FDA uses 400 mg a day as a general limit for healthy adults. For extra electrolytes later in the day, switch to caffeine-free Fire Salt Essential Hydration.
