free shipping over $49.99

EFS Hydration Drink Mix - 30 Servings

Regular Price: $34.99

So much more than just a hydration mix
The new EFS provides premium nutrition that supports physical and mental performance for elite athletes, redefining the limits of endurance nutrition so you can redefine the limits of endurance.

show more SKU: FEEED030
Regular Price: $34.99

Sorry, This item is Out of stock
Notify me when this product is in stock


Average Rating

The new EFS provides premium nutrition that supports physical and mental performance for elite athletes, redefining the limits of endurance nutrition so you can redefine the limits of endurance.

  • Improves mental toughness & sharpens your competitive edge
  • Prevents cramping & helps you hydrate fast
  • Provides immediate & sustained fuel when you need it most
In addition to unlocking the mental game, EFS pushes cramp prevention and continuous fueling to new levels. It includes all five electrolytes totaling 1,160mg. That’s twice the amount of traditional mixes, and—since we improved the flavor—it tastes great at full concentration (or beyond).

There’s no need to dilute it and supplement with electrolyte tabs just to make it palatable. It’s also got more carbs from more sources, including complex carbs for prolonged energy and high-glycemic carbs for immediate use.

 This is a first-in-series feature on the reimagined EFS, focusing on a mind-over-matter compound that makes perfect sense for maximizing your brain’s control of your exercise performance: L-theanine, or more specifically, Suntheanine® L-theanine. Theanine calms anxiety and stress (both physical and mental), reinforcing mental toughness so you maintain perspective when an obstacle—your screaming legs, another gap to close, a looming wall—threatens to crush your motivation. It also provides immune system support, especially during intense exercise when your body may become vulnerable as it depletes its reserves.

Mix one scoop EFS per 12 ounces of water. Consume one serving 15-30 minutes before exercise and take one serving every 30 minutes during exercise. EFS can be mixed up to 2x strength for additional calories and electrolytes.

Sample Flavor:
Fruit Punch 
Serving Size: 1 scoop (32g)
Servings per Container: 30
 Amount Per Serving %DV*
 Calories 110
  Calories from fat 0
Total Carbohydrate 26g
   Sugars 16g **
      Includes 16g Added Sugars 32%
 Protein 0g  0%
 Calcium 100mg
 (as DiCalcium Malate)
 Magnesium 150mg
 (DiMagnesium Malate)
 Chloride 450mg
 (as Sodium Chloride)
Sodium 300mg
 (as sodium chloride)
Potassium 160mg
 (as di-potassium phosphate)
L-Glutamine 1750mg  **
Branched Chain Amino Acids 250mg
(Leucine, Iso-Leucine, Valine)
 L-Theanine 50mg **
* Percent Daily Values are based on a 2,000 calorie diet.
** Daily Value Not Established
Other Ingredients: Sugar, Maltodextrin, Dextrose, Citric Acid, Natural Flavor, Stevia Extract


Q: I am prone to cramping during longer training and racing. Will EFS help me with cramping problems?

 A: Nutritionally, cramping stems from electrolyte imbalance, electrolyte depletion and/or dehydration. EFS provides the most potent electrolyte profile available. The combination of all five electrolytes delivers a potent 1160mg per serving, helping to prevent cramping. The 300mg sodium per serving also aids in maximum fluid absorption so you stay hydrated throughout your training and racing. Supplementing with additional salt tabs, electrolyte tabs, or salty snacks is no longer needed when using EFS.

Q: How much EFS should I use during my training and racing?

A: Clinical research shows that a 6-8% solution delivering between 45-60g carbohydrates, >1000mg amino acids, 400-600mg sodium and equivalent balance in all electrolytes should be taken every hour during exercise. Athletes should consume one serving for every 30 minutes of intense exercise. Adjustments should be made based on body weight, training state, heat, individual sweat rates and preference. Use one serving for every 30 minutes as a starting point and adjust as necessary from there.  Additional calories and electrolytes can be added with EFS liquid shots.

Q: I’ve heard that there are benefits to having protein during exercise. Why doesn’t EFS contain protein?

A: EFS contains 2g free form amino acids per serving which is the equivalent in BCAA and glutamine profile to 9g whey protein. Protein naturally contains BCAAs and glutamine.

Clinical evidence supporting the use of BCAAs and glutamine during exercise dates back to 1991. These clinical studies clearly indicate supplementing with as little as 1g free form amino acids improved performance, reduced post-exercise muscle damage, improved muscle glycogen resynthesis, reduced central fatigue and improved rate of perceived exertion. These are the same claims made by the most recent protein study and clearly support a mechanism for improved performance.

In addition to the clinical support, other factors lead to a decision to use these free form amino acids over complete proteins.

  • Proteins are more difficult to digest than amino acids during exercise
  • Proteins don’t taste very good during exercise
  • Proteins can reduce the glycemic index of a drink, further reducing its ability to be quickly absorbed
  • There is considerably more evidence supporting free form amino acids than complete proteins

Q : First Endurance has added an ingredient called PharmaGABA® to EFS-PRO. Why? What does it do for me?

A: Research shows the brain plays a significant role in fatigue and exercise tolerance. Our latest formulations of EFS and EFS-PRO expand the focus beyond simply supporting your body to buttressing up mental toughness—often the final hurdle an athlete has to overcome whether they’re training alone or competing.

Toward this end, our research has led us to ingredients like Suntheanine® (which we also include in EFS) and, in EFS-PRO, Suntheanine® plus PharmaGABA®. The net result of these two ingredients is to boost calm control while your body’s suffering is triggering panic in your brain. By balancing your brain’s response to suffering, EFS and EFS-PRO help ensure you get the most out of every stride or pedal stroke when the suffering ramps up and every watt is invaluable.

eCommerce Development @Matrid