SLF Electrolyte Comparison · 2026
CVS Health Rapid Hydration
Hot-Weather Endurance · Exercise & Workouts · Travel
Check Price at CVSRead full review ↗
SOS Hydration
Hot-Weather Endurance · Everyday Hydration · Exercise & Workouts
Check Price at CVSRead full review ↗SOS Hydration
Best overall data score for this matchup based on formula, value, rating, and intended use.
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At a Glance
A quick side-by-side look at nutrition, value, and overall performance.
| Feature | CVS Health Rapid Hydration | SOS Hydration | 🏆 Edge |
|---|---|---|---|
| Sodium | 510 mg | 330 mg | CVS Health Rapid Hydration |
| Potassium | 380 mg | 190 mg | CVS Health Rapid Hydration |
| Magnesium | Not listed | 35 mg | SOS Hydration |
| Sugar | 11.0 g | 3.0 g | SOS Hydration |
| Calories | 50 | 15 | SOS Hydration |
| Sweetener | Sucrose, dextrose, stevia extract | Sugar, dextrose, stevia extract | Preference |
| Cost per serving | $1.67 | $1.50 | SOS Hydration |
| SLF rating | ★★★☆☆3.2/5 | ★★★★☆4.3/5 | SOS Hydration |
HydraPeak Voyager 40 oz Stainless Steel Tumbler
Keep hydration close all day with this 40 oz insulated stainless steel tumbler featuring a handle, 2-in-1 sip-and-straw lid, non-slip base, and cup-holder-friendly design.
Functional Ingredients
Additional active or performance-oriented ingredients recorded in the SLF database.
CVS Health Rapid Hydration
- Vitamin C
- vitamins B3
- B5
- B6 and B12
A strong value-oriented CVS alternative to Liquid I.V. for rapid hydration, especially for shoppers who prefer to buy in-store or through CVS delivery.
SOS Hydration
- Vitamins B6
- B12
- C
- D
- folic acid
- magnesium
- zinc
A compelling low-sugar, ORS-inspired electrolyte powder for daily hydration, exercise, heat and travel, especially for shoppers who want more sodium than many everyday mixes.
Key Differences
The most meaningful data-backed differences in this matchup.
CVS Health Rapid Hydration
Why it matters: Higher sodium can better replace larger sweat losses during prolonged exercise or heat.
SOS Hydration
Why it matters: Lower sugar may suit people prioritizing reduced-sugar hydration.
SOS Hydration
Why it matters: A lower cost per serving can make frequent use more practical.
CVS Health Rapid Hydration
Why it matters: Potassium supports fluid balance and normal muscle function.
SOS Hydration
Why it matters: A broader functional-ingredient profile may appeal to users seeking vitamins or carbohydrate-assisted hydration.
Who Should Choose Each Product?
Use these guidelines to find the best fit for your hydration needs and lifestyle.
Choose CVS Health Rapid Hydration if…
- Hot-Weather Endurance
- Exercise & Workouts
- Travel
- Heat & Outdoor Work
- Cvs Shoppers
- Hot Weather
- Heavy Sweating And Occasional Rapid Hydration
A strong value-oriented CVS alternative to Liquid I.V. for rapid hydration, especially for shoppers who prefer to buy in-store or through CVS delivery.
Choose SOS Hydration if…
- Hot-Weather Endurance
- Everyday Hydration
- Exercise & Workouts
- Travel
- Heat & Outdoor Work
- Daily Hydration
- Sweating
- Heat And Travel
A compelling low-sugar, ORS-inspired electrolyte powder for daily hydration, exercise, heat and travel, especially for shoppers who want more sodium than many everyday mixes.
Pros and Considerations
CVS Health Rapid Hydration
✓ Strengths
- Substantial sodium supports exercise and hot-weather hydration
- Provides meaningful potassium
● Keep in Mind
- Contains 11.0 g sugar per serving
- Magnesium amount is not disclosed in the current SLF record
SOS Hydration
✓ Strengths
- Moderate sodium level suits everyday hydration needs
● Keep in Mind
- Contains 3.0 g sugar per serving
SOS Hydration
SLF scoring considers nutrition, formula, price, certifications, intended use, and value.
Why it earns the edge
- Moderate sodium level suits everyday hydration needs
Choose CVS Health Rapid Hydration instead if you:
- Hot-Weather Endurance
- Exercise & Workouts
- Travel
- Heat & Outdoor Work
Choose Your Electrolyte
Shop the product that best fits your needs. Amazon is shown first when available, with a direct brand option as the fallback.
CVS Health Rapid Hydration
Check Price at CVS SOS Hydration
Check Price at CVSFind the electrolyte that fits your needs
Explore the full database by activity, sodium level, sugar preference, goals, budget, and retailer.
Frequently Asked Questions
Data-backed answers based on the current SLF product records.
Which has more sodium?
CVS Health Rapid Hydration contains 510 mg of sodium per serving, compared with 330 mg. Higher sodium may be more useful when replacing larger sweat losses during prolonged exercise or hot conditions.
Which has less sugar?
SOS Hydration has less sugar at 3.0 g per serving, versus 11.0 g. This may matter for people limiting added sugar.
Which is less expensive per serving?
SOS Hydration is currently less expensive at $1.50 per serving, compared with $1.67. Pricing can change by retailer and package size.
What functional ingredients does each product include?
CVS Health Rapid Hydration lists Vitamin C, vitamins B3, B5, B6 and B12. SOS Hydration lists Vitamins B6, B12, C, D, folic acid, magnesium. Functional ingredients supplement the core electrolyte profile but do not automatically make one product better for every use.
Which product is better overall?
SOS Hydration earns the higher SLF comparison score based on the available formula, value, rating, and intended-use data. CVS Health Rapid Hydration may still be the better fit when its specific use cases align more closely with your needs.
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Nutrition facts, pricing, and availability can change. Verify the current label before purchasing. This comparison is informational and is not medical advice.