Updated 2026-11-03 · 5 min read
Electrolytes in Thailand: label comparison and sweat sodium calculator
By the UnReal Supplements team. Sources and catalog last checked: 2026-11-03.
Short answer
Electrolyte drinks help when you sweat a lot for a long time, not for every session. The ACSM says drinks with electrolytes can beat plain water under certain circumstances, and that sweat loss and sweat sodium vary a lot between people. Weigh yourself before and after a session to see your own loss.
Last checked 2026-11-03
| Product | Sodium | Potassium | Magnesium | Sugar | Price per serving |
|---|---|---|---|---|---|
| WILDER Electrolytes, one 10.6 g sachetOn the shelf · Label photo on the product page | 1,000 mg | 600 mg | 100 mg | Label prints NO SUGAR ADDED, no gram figure | 56.3 THB |
| Fast&Up Reload effervescent tablet, cola, one 4.1 g tabletNot on the shelf today · Label photo on the product page | 180 mg | 77 mg | 20 mg | Label: total sugars 0.81 g, of which added sugars 0.64 g | 12.5 THB |
Price per serving is computed live from the catalogue. Nutrient figures are read from the label photos on the product page.
Weigh yourself before and after, add what you drank. 1 kg of weight lost is about 1 litre.
Estimated sodium lost
1.21 litres of sweat
About 999 mg of sodium with typical sweat
Range across the three saltiness levels: 709 to 1,288 mg (586 to 1064 mg per litre)
Sodium in the products we compare
- WILDER: 1 sachet(s)
- Fast&Up Reload: 5.6 tablet(s)
Read this as an estimate
Presets come from a study of 506 athletes in 15 to 50 degrees C: whole body sweat sodium 35.9 mmol per litre (SD 10.4, range 18.2 to 70.8) and sweating rate 1.21 litres an hour (SD 0.68, range 0.26 to 5.73). Lower and higher are the mean minus and plus one SD. One mmol of sodium is 22.99 mg.
Sweat rate and sweat sodium differ a lot between people and between days, and the ACSM recommends a customised plan. Bangkok heat and humidity push sweat rate up. A weigh in before and after a real session beats any preset.
This estimates what you lose. It does not tell you what you must drink or take. It is general information, not medical advice. If you have a heart, kidney or blood pressure condition, ask your doctor about salt.
What we left out
- Pocari Sweat, Sponsor, Gatorade, 100PLUS and Royal-D drinks: on 2026-11-03 neither a readable label photo on the 7-Eleven ALL Online listings nor the brand pages read (pocarisweat.co.th, tcp.com Sponsor page) printed sodium, potassium or sugar per bottle, so no row was made.
- ON Amino Energy and creatine blends with electrolytes: the catalogue row has no sodium figure, so they are not ranked.
Do you need electrolytes for a normal gym session?
The American College of Sports Medicine (ACSM) position stand sets the goal of drinking during exercise as preventing excessive dehydration, more than 2 percent of body weight lost as water, and excessive changes in electrolyte balance. It says drinks containing electrolytes and carbohydrate can provide benefits over water alone under certain circumstances. It does not say everyone needs them every session.
How do you measure your own sweat loss?
Both the ACSM and a 2017 review by Baker say sweat rate and sweat sodium vary considerably between individuals, and the ACSM recommends customized plans. The simplest accurate method is to weigh yourself before and after a session: the weight lost, together with what you drank, shows how much fluid you lost.
A loss above 2 percent of bodyweight is the ACSM's marker for excessive dehydration. Test it in a long, hot session, not a short one.
When do electrolytes make sense in Bangkok?
The ACSM leaves "certain circumstances" open, so this is our reading rather than a rule from the paper:
- Long sessions or back to back classes where you sweat heavily.
- Outdoor training or a run in the heat.
- Days you notice a large weight drop on the scale after training.
- If you want something to drink after training that replaces both fluid and salt, and plain water has not been enough for you.
How do we compare electrolyte products?
We compare cost per serving and the sodium per serving, and only for products whose sodium is listed in our catalog, because we will not guess a number. The table below shows what is on our shelf today, and it is empty when nothing that qualifies is on the shelf. Delivery is within Bangkok only, free when the product total after discounts is at least ฿1,500.
Amino drinks that include electrolytes, and creatine blends that include electrolytes, are a different job. Read the aminos guide before treating one as a sports drink.
| Product | Pack | Price | Per serving | Sodium per serving | Today |
|---|---|---|---|---|---|
| WILDER Electrolytes, 30 sachets4 flavours | 30 sachets | ฿1,690 | 56.3 | 1000 mg | On the shelf |
| WILDER Electrolytes Variety Box, 12 sachets (4 Yuzu, 4 Peach1 flavour | 12 sachets | ฿695 | 57.9 | 1000 mg | On the shelf |
| WILDER Electrolyte Drink Mix, 3-pack pouch (Yuzu, Peach1 flavour | 3 sachets | ฿185 | 61.7 | 1000 mg | On the shelf |
2 more product types are listed in the catalog but not on the shelf today. Browse the category.
Compare labels and estimate your sweat sodium
The table above lists sodium, potassium, magnesium and sugar per serving for the electrolytes on our shelf, read from the label photo on each product page on 2026-11-03. The calculator estimates the sodium you lose in a session from published averages, or from a sweat loss you measured yourself.
In Bangkok heat and humidity sweat loss can be high, so a measured weigh in beats any preset. This is general information, not medical advice.
Frequently asked
- Do I need electrolytes when I train?
- Not every session. The ACSM says drinks with electrolytes and carbohydrate can help compared with water alone under certain circumstances, such as heavy sweating over a long time. Measure your own sweat loss to decide.
- How do I know how much I sweat?
- Weigh yourself before and after a session and account for what you drank. This body weight method is the simplest and most accurate way to estimate sweat loss, according to Baker's 2017 review.
- Is plain water enough in Bangkok heat?
- The ACSM does not say water is enough or not enough for everyone. It says drinks with electrolytes can help under certain circumstances and that individual plans are best, because sweat loss and sweat salt vary a lot between people. Weigh yourself before and after a long session and see.
- Where can I buy electrolytes in Bangkok?
- At UnReal Supplements, delivered anywhere in Bangkok, free when the product total after discounts is at least ฿1,500. The table on this page shows what is on the shelf today. Each product page shows Add to cart or Notify me.
- How much sodium is in WILDER and Fast&Up Reload?
- From the labels we read on 2026-11-03: a WILDER sachet has 1,000 mg sodium, 600 mg potassium and 100 mg magnesium. A Fast&Up Reload cola tablet has 180 mg sodium, 77 mg potassium and 20 mg magnesium.
- How does the sweat sodium calculator work?
- It multiplies sweat volume by sodium concentration. Presets use the mean and one standard deviation either side from Baker et al. (506 athletes): 1.21 L an hour and 35.9 mmol of sodium per litre, with one mmol equal to 22.99 mg. A measured sweat loss overrides the rate.
Keep reading
Sources
- ACSM Position Stand: exercise and fluid replacement (Sawka et al., 2007)
- Sweating rate and sweat sodium concentration in athletes (Baker, 2017)
- Normative data for regional sweat sodium concentration and whole body sweating rate in athletes (Baker et al., 2016)
How we keep this guide honest
We check this guide against the sources listed below. Prices, pack sizes and shelf status in the tables are read from our shop catalog and refreshed every few minutes, never typed into the text. We deliver within Bangkok only, free when the product total after discounts is at least ฿1,500, and only what is on the shelf is for sale.