Sweat doesn't just cost you water. How much sodium you lose with it varies hugely between people — sports-science testing across athletes has found sweat sodium concentration ranging from roughly 200mg to over 2,000mg per litre, with most people somewhere in the middle. That range is wide enough that a single "best electrolyte powder" recommendation doesn't actually work for everyone. What matters is matching sodium load, format, and ingredients to what you're actually doing — not picking whichever pack lists the most minerals on the front.
Here's what to actually check before buying an electrolyte powder in the UK, how the category typically compares, and where Nuviita Performance Electrolytes fits — numbers included.
What to check before you buy
- Sodium. The main electrolyte lost in sweat, and the biggest source of variation between products — see the table below.
- Potassium, magnesium, calcium. Supporting minerals. Whether they're included, and at what dose, varies more than most labels make obvious.
- Sugar/carbohydrate content. A straightforward spec to compare — check whether a product is sugar-free or includes added carbohydrate, and whether that matters for what you're using it for.
- What else is in the formula. Some products are electrolytes only. Others add supporting ingredients on top.
- Format. Powder (tub or individual sachet) or effervescent tablet — affects portability and how precisely you can control concentration.
- Price per serving. The number that actually matters, not the pack price.
How UK electrolyte powders typically compare
No two named products are compared here. What follows are typical ranges seen across the category, based on current research, set against Nuviita's own numbers.
| What to compare | Why it matters | Typical range across the category | Nuviita Performance Electrolytes |
|---|---|---|---|
| Sodium | The primary electrolyte lost in sweat; higher-sodium formulas suit heavier sweat losses and longer sessions | Commonly 300mg–1,000mg+ per serving — the single biggest point of difference between products | 560mg |
| Potassium | Works alongside sodium for fluid balance and normal muscle function | Included in most formulas, though the dose and whether it's disclosed per serving both vary | 300mg |
| Magnesium | Contributes to normal muscle function | Included in many formulas at modest doses; some omit it entirely | 100mg |
| Calcium | Supports muscle and nerve function | Less consistently included, and rarely at a meaningful dose where present | 25mg |
| Sugar | A straightforward spec, not a performance claim — relevant if you're already consuming carbohydrate elsewhere in a session | Ranges from 0g in sugar-free formulas to added carbohydrate in others | 0g, stevia-sweetened |
| Format | Affects portability and dosing control | Powder (tub/sachet) or effervescent tablet | Individual 8g sachet |
| Price per serving | The actual cost, not the pack price | Commonly around 10p to £1+ per serving, depending on format and sodium load | ~£1.00 (£24.95 ÷ 25 sachets) |
Category ranges are drawn from current publicly available UK electrolyte product research, presented as general market observations, not a verified market audit or a claim about any specific named product.
How much sodium do you actually need?
This is the question most "best electrolyte powder" content skips. The American College of Sports Medicine's fluid-replacement guidance suggests sodium becomes worth actively replacing for sessions longer than about an hour — recommending roughly 0.5–0.7g of sodium per litre of fluid consumed. For shorter sessions, plain water is usually enough for most people, and electrolyte replacement comes down more to preference than requirement.
Individual variation is large — sweat sodium concentration has been measured anywhere from around 200mg to over 2,000mg per litre in athlete testing, with roughly 900–1,000mg/L a commonly cited average. Heat, sweat rate, exercise intensity, and individual physiology all move that number, which is why a single fixed recommendation doesn't fit everyone.
Nuviita Performance Electrolytes — the full profile
Per 8g sachet, on top of the electrolyte figures in the table above, Nuviita adds a Performance Amino Complex:
- L-Citrulline Malate (2:1): 1200mg
- Beta-Alanine: 600mg
- Taurine: 400mg
- L-Tyrosine: 250mg
- L-Glutamine: 500mg
Zero sugar, stevia-sweetened, vegan friendly. Available in Lemon Lime, Tropical Orange, and Summer Berries — 25 sachets per pack, £24.95 (~£1.00 per serving).
Best electrolyte powder by training type
- Gym & strength training. Sessions are often under an hour, so sodium need is usually lower — this is more about preference and personal sweat rate than a hard requirement.
- Running. Sodium relevance increases with session length and heat; longer runs are where the ACSM's >1-hour guidance starts to apply.
- Cycling. Longer time in the saddle and variable heat exposure make sodium and fluid planning more relevant than for shorter gym sessions.
- HYROX & functional fitness. Sustained effort over roughly an hour or more, often in a warm venue — closer to the running/cycling case than a short gym session.
- Everyday hydration. Outside structured training, food and water are typically sufficient for most people; an electrolyte powder here is a preference choice, not a requirement.
How to use it
Mix 1 sachet with 500ml of water. It can be used before, during, or after exercise, or any time you need hydration generally. Don't exceed 2 servings a day.
Key takeaway
- Sodium is the electrolyte that actually varies most between products and between people — check the milligram figure, not just whether it's listed.
- For most sessions under an hour, water is usually enough; sodium replacement becomes more relevant past that point, per ACSM guidance.
- Price per serving (not pack price) is the number worth comparing.
- Nuviita Performance Electrolytes: 560mg sodium, 300mg potassium, 100mg magnesium, 25mg calcium, zero sugar, plus a five-part amino complex, at ~£1.00 per serving.
FAQ
How much sodium do I lose when I sweat?
It varies significantly by person — sports-science testing has found sweat sodium concentration ranging from roughly 200mg to over 2,000mg per litre, with averages commonly cited around 900–1,000mg/L. Heat, sweat rate, and individual physiology all affect the figure.
Do I need an electrolyte powder for every session?
Not necessarily. American College of Sports Medicine guidance points to sodium replacement mattering more for exercise longer than about an hour; for shorter sessions, water is usually sufficient for most people.
Electrolyte powder or tablets — what's the difference?
Powders dissolve into water you measure yourself, so concentration is up to you within the serving guidance. Tablets are more portable but the dose per tablet is fixed. Nuviita is a powder — 1 sachet mixed with 500ml water.
How many electrolyte sachets should I have a day?
Nuviita's label states up to 2 servings a day. Individual fluid needs vary with activity, heat, and other factors, so this is a stated maximum rather than a one-size target.
Is Nuviita electrolyte powder suitable for vegans?
Yes — it's stevia-sweetened and vegan-friendly, per the label.
Sources & further reading
Sodium and fluid replacement guidance referenced above is drawn from the American College of Sports Medicine's position stand on exercise and fluid replacement, and from published sports-science research on sweat sodium concentration testing across athletes. Category-level product ranges (sodium, price per serving) are based on current publicly available UK electrolyte product research, presented as general observations rather than a verified market audit.
Try Nuviita Performance Electrolytes
Full electrolyte profile (560mg sodium, 300mg potassium, 100mg magnesium, 25mg calcium) plus a full Performance Amino Complex — zero sugar, no crash, vegan friendly. 25 sachets per pack, £24.95 (~£1.00 per serving).
Food supplements should not replace a balanced diet.