Ideal for endurance riders, runners and triathletes who train or race in the heat, sweat heavily, or want a stronger hydration mix than a standard everyday electrolyte tablet.
STYRKR SLT+ Berry & Lime is a high-strength electrolyte supplement built for riders and endurance athletes who need more than a light hydration tab. Each serve delivers a heavy sodium dose alongside potassium, magnesium and calcium, so it makes sense for hot-weather training, long events and anyone who knows they’re a salty sweater. The Berry & Lime flavour adds some lift without loading the bottle with sugar, and the formula is vegan friendly, gluten-free and non-GMO.
What stands out here is how purpose-built it feels for harder days rather than everyday sipping. The fast-dissolving powder and single-serve sachet format make it easy to throw a few in a jersey pocket, top-tube bag or race-day kit, and the formula is made to be light on the gut when intensity goes up. If you’ve found standard electrolytes too mild, SLT+ gives you a more serious option without having to stack multiple weaker serves.
For buyers choosing between hydration products, the big draw is simple: more sodium per serve than many mainstream options, with the reassurance of Informed Sport certification for riders and racers who care about tested nutrition. It’s the kind of product we’d point you towards when plain water isn’t enough and a standard low-strength tab still leaves you chasing cramps or feeling flat late in the session.
High-strength hydration formula
Designed for long endurance efforts, hot conditions and heavier sweat loss where a lighter electrolyte mix may not be enough.
Quad-electrolyte blend
Combines sodium, potassium, magnesium and calcium to replace the key minerals lost through sweat.
Strong sodium focus
The standout here is the 1080 mg sodium hit per serve, making it a practical pick for riders who know they need more salt support.
Fast-dissolving sachets
The powder mixes quickly, so it’s easy to prep a bottle before a ride, at the trailhead or during an event stop.
Portable single-serve format
Compact sachets are easy to stash in a jersey pocket, race vest, saddle bag or travel kit without mess.
Light on the gut
Built to stay easier to tolerate when intensity rises and you still need to keep drinking regularly.
Informed Sport certified
A strong option for competitive riders and athletes who want screened ingredients and banned-substance testing.
General
Nutritional values
Electrolytes per serving
Ingredients
Features
SLT+
We’d choose SLT+ when you need a stronger electrolyte hit for hot conditions, heavy sweat loss and long endurance efforts. It’s built to help you stay hydrated, support performance and start recovery before the session is over.
Quad-blend electrolyte mix
This four-electrolyte formula is tuned to replace the key minerals you lose in sweat, with extra sodium to better support hydration and endurance when the effort ramps up.
Sodium (Chloride)
Sodium helps support fluid balance and normal muscle and nerve function, making it the key player when you need to replace what heavy sweating takes out.
Potassium (Chloride)
Potassium supports normal muscle and nerve function, helping you keep moving smoothly through long training sessions and races.
Magnesium (Citrate)
Magnesium helps reduce tiredness and fatigue while supporting energy release, muscle function and electrolyte balance, so you can keep your effort steadier for longer.
Calcium (Malate)
Calcium supports muscle function and energy metabolism, while also contributing to healthy bones and teeth.
Informed Sport
Informed Sport certification gives you extra confidence in what you’re using, with screened ingredients and banned-substance testing for a cleaner, more trusted hydration option.
Great for
Maybe not for
No sizing applies. This is a single-serve powder sachet format rather than a tablet or capsule. Best suited to athletes intentionally looking for a high-sodium hydration product; if you usually prefer lighter-tasting, lower-strength everyday hydration, this may feel stronger than necessary.
vs Precision Fuel & Hydration PH 1500 Drink Mix
A logical rival for athletes who also want a strong electrolyte product for heavy sweating and hot conditions.
vs LMNT Drink Mix
Another high-sodium, sugar-free electrolyte mix aimed at athletes who want stronger hydration support than mainstream sports drinks.
vs Science in Sport GO Hydro Tablets
A more everyday-style hydration option in tablet form, popular with riders who want quick bottle prep and a lighter-strength product.
Best used when sodium loss is the real problem
If you finish long rides with salt marks on your kit, cramping, or that washed-out feeling despite drinking plenty, this kind of high-sodium mix makes more sense than simply drinking more plain water.
A stronger option than many standard tabs
A lot of mainstream hydration tablets are built for lighter everyday use. SLT+ sits in the stronger end of the category, so it’s better reserved for harder sessions, hotter weather and longer events.
Easy to pack for race day
The sachet format is handy if you want to pre-count your nutrition for a fondo, gravel race or stage event. It’s neat, lightweight and easy to keep in a pocket or feed bag.
Good fit for mixed fuelling setups
Because this is very low in sugar per serve, it can work well alongside carb bottles, gels or bars when you want to separate your hydration strategy from your energy intake.
Giving you the strength to go further.
STYRKR is a British endurance sports nutrition brand focused on fuelling, hydration and recovery products for cycling, running and other long-duration sports. Its range covers energy gels, drink mixes, bars and electrolytes, with an emphasis on practical products for everyday athletes as well as serious racers.
The brand positions performance testing and athlete support as a core part of its identity, including its SIGR Human Performance Lab at STYRKR HQ near Gatwick. STYRKR also highlights UK manufacturing across its range and supports FareShare through a donation of 1% of profit from products sold.
