Choosing the wrong electrolyte supplement is not just a waste of money. For a 65-year-old with circulatory concerns, taking a high-sodium sports formula designed for a marathon runner could actively work against them. For a child on a hot summer day, a formula loaded with slow-release carbohydrates and collagen is simply the wrong tool. Plusssz has built its reputation as one of the best electrolyte supplement UK brands by refusing to sell a single all-ages formula and expecting everyone to make it work. Instead, it has developed three distinct, purpose-engineered products: Electrolytes SPORT 100% Complex, Electrolytes SENIOR 100% Complex, and Junior Electrolytes Complex. This guide breaks down exactly what is in each formula, who it is designed for, and how to pick the right one without second-guessing yourself.
Key Insight |
Explanation |
|---|---|
SPORT uses PALATINOSE, not glucose |
PALATINOSE is a slow-release carbohydrate with a low glycemic index, providing sustained energy without blood sugar spikes during and after exercise. |
SENIOR has deliberately low sodium |
The SENIOR formula is formulated with reduced sodium content (0.05 g per 100 ml prepared), which is important for older adults managing blood pressure. |
Junior uses glucose, not isomaltulose |
Children need readily available energy. The Junior formula uses glucose for immediate replenishment rather than a slow-release carbohydrate engineered for endurance athletes. |
Butcher's broom is exclusive to SENIOR |
This plant extract supports vascular circulation and blood flow in the lower limbs, addressing a concern specific to the ageing circulatory system. |
SPORT contains collagen and coenzyme Q10 |
These additions support joint health, muscle recovery, and cellular energy, making SPORT uniquely suited to regular training rather than casual hydration. |
Junior covers 100% of vitamin Reference Intakes for children |
The five-vitamin blend in Junior is dosed specifically to meet children's daily requirements, not adult values. |
All three are sugar-free by addition |
No formula has added sugar. Any carbohydrates present (glucose in Junior, isomaltulose in SPORT) are functional ingredients, not sweeteners. |
The popular notion that electrolytes are simply "salt and water" undersells how different the physiological needs are between a 28-year-old triathlete, a 70-year-old managing mild hypertension, and a 7-year-old running around on a hot afternoon. Each demographic loses fluids at different rates, needs different mineral ratios, and processes carbohydrates differently. A formula optimised for peak athletic output will likely carry a sodium load and a carbohydrate profile that an older adult or a child simply does not need, and may in some cases not tolerate well.
Compared to competitors like Science in Sport, High Five, and ORS Hydration, which largely target adult athletes with a single hydration format, Plusssz has taken the deliberate position of building separate product lines. The result is three effervescent tablet formulas that differ meaningfully in their electrolyte ratios, added active ingredients, carbohydrate sources, and sodium density. Understanding those differences is the only reliable way to know which one belongs in your gym bag, your parent's kitchen, or your child's school bag.
"Physiological changes related to the ageing process reduce the feeling of thirst. Seniors are especially prone to dehydration without even noticing it." This is the underlying design philosophy behind the SENIOR formula, where hydration access is made as easy as possible without adding unnecessary sodium or sugar.
Every Plusssz formula comes as an effervescent tablet dissolved in 200 ml of cold water. The delivery mechanism matters. Effervescent tablets improve the rate of absorption compared to swallowed capsules or tablets, and the drink format encourages fluid intake itself, which is the primary goal of any electrolyte product.
The SPORT formula is the most technically complex of the three. Its defining ingredient is PALATINOSE (isomaltulose), a slow-release carbohydrate derived from sugar beet that has a significantly lower glycemic index than glucose or maltodextrin. Because it is absorbed more slowly, it produces a smaller, more balanced increase in blood glucose and remains available for fuel both during and after exercise. For endurance athletes, interval trainers, or anyone doing sessions lasting longer than 45 minutes, this matters. You get sustained energy output without the spike-and-crash cycle that comes from dextrose-heavy competitor products.
The SPORT formula delivers a full five-electrolyte set: sodium (600 mg per daily dose of three tablets), potassium (300 mg), magnesium (187.5 mg), calcium (200 mg), and chloride (200 mg). Magnesium at this level supports muscle function and helps reduce feelings of tiredness and fatigue. Calcium contributes to normal energy metabolism. These are not token inclusions; they reflect the actual mineral losses that occur during moderate to intense physical activity through sweat.
Beyond the electrolytes, SPORT adds manganese, which contributes to the maintenance of normal bone structure, plus hydrolysed collagen (15 mg per daily dose) and vitamin C (200 mg, which is 250% of the adult Reference Intake). Vitamin C at this level is specifically noted to contribute to the normal function of the immune system during and after intense exercise. The collagen is there for joint and connective tissue support during training. Coenzyme Q10 (400 mcg per daily dose) rounds out the formula, addressing cellular energy production. The lemon-grapefruit flavour, achieved without added sugar, comes in packs of 24 tablets. The recommended intake is three tablets per day, dissolved in water.
Pro tip: Take SPORT 30 to 45 minutes before your session rather than mid-workout. The slow-release nature of PALATINOSE means it performs best when it has time to enter the bloodstream steadily before demand peaks.
The SENIOR 100% Complex shares the full five-electrolyte framework with SPORT (sodium, potassium, magnesium, calcium, chloride), but critically, the sodium content is deliberately reduced. The prepared drink contains 0.05 g of sodium per 100 ml, meeting the regulatory definition of "low sodium." This is not an oversight. Older adults are disproportionately affected by high sodium intake relative to cardiovascular health, and a hydration product that adds unnecessary sodium load contradicts the reason many seniors need it in the first place.
The most distinctive ingredient in the SENIOR formula is butcher's broom extract (Ruscus aculeatus). This plant extract supports vascular circulation and contributes to proper blood flow in the lower limbs. Reduced circulation in the legs is a common complaint among older adults, particularly those who are less mobile or spend extended periods seated. Including it in a daily hydration product means seniors get this support automatically as part of their fluid intake routine, rather than needing a separate supplement.
The formula also adds vitamins B6 and B12, both of which help maintain normal psychological functions and support the proper functioning of the immune system. B12 absorption decreases with age due to reduced production of intrinsic factor in the stomach, making supplementation genuinely useful for this demographic rather than just a marketing addition. The raspberry-lemon flavour comes in packs of 24 tablets. Two tablets per day is the recommended intake.
Potassium in the SENIOR formula contributes to maintaining normal blood pressure, a meaningful functional benefit for the demographic most likely to be monitoring it. No competing senior-focused hydration product from brands like ORS Hydration or High Five currently makes this demographic-specific formulation distinction at all.
Pro tip: For seniors who regularly experience afternoon fatigue or swollen ankles after sitting, taking a SENIOR tablet dissolved in water mid-afternoon creates a consistent hydration habit at the time when fluid intake tends to drop off most sharply.
The Junior formula is the simplest and most focused of the three, and that is exactly right. Children's hydration needs during physical activity, illness, hot weather, or travel are real, but the solution should not involve collagen, butcher's broom extract, or slow-release carbohydrates engineered for adults in endurance sport. The Junior formula delivers three core electrolytes (sodium, potassium, and magnesium) at concentrations appropriate for children, supplemented with glucose for immediate energy replenishment and a five-vitamin complex.
The five vitamins included in Junior are dosed to provide 100% of the daily Reference Intake values for each, calibrated for children's needs. This means a parent giving their child a Junior tablet is covering a meaningful portion of the day's micronutrient requirements alongside hydration support, without the risk of over-supplementing with adult-targeted doses. The formula contains fruit juice powder and comes in an orange flavour, which is a practical choice for children who would otherwise resist a supplement product.
The product is suitable for children over 3 years of age and for adults. This matters for families who want a single convenient option for younger children and themselves, though adults doing any form of structured sport would be better served by SPORT. The pack contains 20 effervescent tablets and the recommended daily intake is three tablets. Junior contains no caffeine, no adaptogens, no collagen, and no botanical extracts. Everything in it is appropriate and necessary for the target age group.
A common mistake parents make is assuming a children's version of any supplement is just a smaller dose of an adult product. The Junior formula is specifically composed, not simply diluted. The electrolyte concentrations reflect what children's bodies actually need during exertion or dehydration, not a scaled-down version of what a 90 kg triathlete requires.
The table below sets out the key formulation differences across all three products. Use it as a quick reference when making a purchasing decision or recommending a formula to someone in your network.
Feature |
SPORT 100% Complex |
SENIOR 100% Complex |
Junior Complex |
|---|---|---|---|
Target user |
Physically active adults and athletes |
Adults aged 60 and above |
Children aged 3 and above |
Electrolytes included |
Sodium, potassium, magnesium, calcium, chloride (5) |
Sodium, potassium, magnesium, calcium, chloride (5) |
Sodium, potassium, magnesium (3) |
Sodium level |
Standard (600 mg per daily dose) |
Low sodium (0.05 g per 100 ml prepared) |
Age-appropriate concentration |
Carbohydrate source |
PALATINOSE (isomaltulose), low GI |
None added |
Glucose (fast-acting) |
Signature active ingredient |
Hydrolysed collagen, coenzyme Q10, manganese |
Butcher's broom extract |
5-vitamin complex at 100% RIV for children |
Vitamins included |
Vitamin C (250% RIV), coenzyme Q10 |
Vitamin B6, Vitamin B12 |
5 vitamins (niacin, B6, and others at 100% RIV) |
Flavour |
Lemon-grapefruit |
Raspberry-lemon |
Orange |
Tablets per pack |
24 |
24 |
20 |
Recommended daily dose |
3 tablets |
2 tablets |
3 tablets |
Added sugar |
No |
No |
No (glucose is a functional ingredient) |
The decision is simpler than most product comparisons make it look. Start with the person, not the product. Three clear paths emerge from the formulation differences above.
If you exercise at least three times per week, do endurance sport, interval training, or any activity involving significant sweating, SPORT is the correct formula. The PALATINOSE energy release, the full five-electrolyte coverage at active-appropriate sodium levels, the collagen for joint health, and the high-dose vitamin C for immune support during intense exercise are all there for a reason. This is the formula to use before, during, or after training, not just on hot days. It is also the right choice if you are recommending a supplement to a friend who is newly active and asking what the best electrolyte supplement UK market has to offer for real training.
The low sodium, the butcher's broom extract for lower limb circulation, and the B12 supplementation (particularly useful where dietary absorption may be compromised by age) make SENIOR the correct choice for older adults. It is also appropriate for anyone managing blood pressure alongside hydration needs. The raspberry-lemon flavour is pleasant without being childish, and the two-tablet daily dose keeps the routine manageable.
Junior is the appropriate choice for children during hot weather, travel, illness recovery, or active play. The formula is specifically composed for children, not simply reduced from an adult product. Parents who are also active adults buying for themselves should add SPORT or the standard Electrolytes Multivitamin to their own routine, as the Junior formula is calibrated for children's Reference Intake values, not adult training demands. You can explore the full Plusssz electrolyte range and the multivitamin complex collection to see all available formulations.
One final note on mixing formulas. There is no reason a household cannot stock more than one. A 65-year-old who does daily walks in summer heat uses SENIOR. Their 35-year-old child who visits for weekend runs takes SPORT. The grandchildren use Junior on a hot day at the park. The three formulas are designed to coexist as a family solution, each doing its specific job without compromise.
Yes, Junior is safe for adults, but it is not optimised for adult training or adult nutritional requirements. The electrolyte concentrations are lower, there is no PALATINOSE or collagen, and the vitamin doses are calibrated against children's Reference Intake values rather than adult ones. In a pinch it will hydrate you, but it should not become a regular substitute for SPORT or the standard multivitamin formula.
The SPORT product packaging notes it should not be used by pregnant or breastfeeding women. If you are pregnant, breastfeeding, or managing a specific health condition, speak to your GP or midwife before starting any electrolyte supplement, regardless of brand.
Sodium replacement is necessary after significant fluid loss through sweat or illness. However, for older adults who may already consume adequate dietary sodium and who are more likely to be managing blood pressure, adding a high-sodium supplement on top of a regular diet can be counterproductive. The SENIOR formula is designed for daily hydration support rather than post-exercise electrolyte loading, so the lower sodium level is a deliberate and appropriate formulation choice, not an omission.
Maltodextrin has a very high glycemic index and produces rapid spikes in blood glucose, which can be useful for very short, intense bursts of effort but leads to sharp energy drops afterwards. PALATINOSE has a low glycemic index and is released much more slowly, sustaining blood glucose levels over a longer period. For most recreational athletes and endurance performers, the steadier energy profile of PALATINOSE is the more useful option for sessions lasting more than 30 to 45 minutes.
The SENIOR formula contains potassium, which can interact with certain medications including some blood pressure drugs and diuretics. If you or someone you care for is on prescription medication, always check with a GP or pharmacist before adding any electrolyte supplement to the daily routine. This applies to all supplement brands, not just Plusssz.
Effervescent tablets dissolve fully in water before ingestion, meaning the active ingredients are already in solution when consumed. This can improve the speed of absorption compared to swallowed capsules or tablets that need to break down in the stomach. Powder sachets achieve a similar result, but pre-measured effervescent tablets have the practical advantage of consistent dosing and no risk of over-scooping or clumping in humid conditions, which is particularly useful in a gym bag or travel kit.
If you have personal experience comparing these Plusssz formulas, or you have found a specific use case that does not fit neatly into the three categories above, share it in the comments, it is genuinely useful for others making the same decision.
