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EFS Liquid Shots are designed to be used in place of gels that can slow down absorption and digestion. Features include a 400-calorie supercharged endurance formula that boasts over 1500mg of electrolytes, 1000mg of amino acids and 100 grams of carbohydrates.


✓ Quick & Long-Lasting Energy for Optimal Performance
Prevents Cramping & Dehydration
✓ Contains No Gelling Agents, Easy to Absorb & Digest



Expiration Dates
Mountain Huckleberry Tray – 04/21
Kona Mocha Tray – 05/21
Vanilla Tray – 06/21
Vanilla Refill – 04/21

This is a different shot. This puppy delivers a potent 400 calories including 1500mg of electrolytes, 1000mg of amino acids all delivered from a 100% recyclable, resealable flask. Unlike most gels on the market, this one has no gel agents so your digestion will stay normal and absorption will be fairly rapid.
The fact that it doesn’t have gelling agents and it doesn’t paste up in the mouth means it’s absorbed into the bloodstream quicker. We had a chance to try it, and not only does it deliver the caloric goods, but the vanilla flavor tastes truly fantastic. Hitting the flask will soon take on a whole new meaning.
This lightly sweetened energy concentrate with a creamy consistency is easier to swallow and digest than gel, especially in cold weather when gels tend to thicken. We liked the no-mess closable spout that lets you take as much as needed per workout.


Unlike gels, EFS Liquid Shots don’t contain any thickening agents, which can slow down absorption and digestion.

EFS Liquid Shots don’t contain Vitamin C because the latest research shows that Vitamin C can have a negative effect on endurance and performance when consumed during exercise.

Plus, the Liquid Shot flask has a re-sealable pop-top that allows you to take as little or as much as you want. They’re also refillable and 100% recyclable, and available in a 32-ounce refill.



Consuming carbohydrates during prolonged exercise enhances performance by supplying energy for muscles to use when glycogen stores begin to drop.

EFS products have been specifically formulated to deliver the ideal blend of complex carbohydrates, glucose (dextrose) and sucrose for energy. Clinical research shows a combination of carbohydrates is better than a single source for the absorption and utilization of blood glucose (Guezennec, C.Y, et.al.).  EFS products also provide three different high-glycemic sources of carbohydrates for immediate energy and easy digestion during long and intense workouts.

The low osmolality of the EFS energy drink and ideal 7% carbohydrate solution provides superior fluid absorption. Clinical research shows that energy drinks mixed within 6-8% offer the optimal absorption of both carbohydrates and fluid for endurance racing and training (Shi, K et al.). The biochemical structure of the carbohydrate, the absorption process, the size of the food particle, the degree of processing, the contents and timing of the previous meal, and the co-ingestion of fat, fiber, or protein affect the absorption of a carbohydrate as well as its glycemic index (GI).


The ability to rapidly replenish carbohydrates after training, and the ability to consume and convert ingested carbohydrates into a usable form of carbohydrate, is important in allowing you to train and compete at your best. Ingestion of the wrong carbohydrates at the wrong time, or ingesting too little carbohydrate can impair performance both in the short term and long term.

Consuming a slowly digested carbohydrate during times where the body is at or above threshold can lead to disaster. During times where you exercise or race at and above your threshold, your blood circulation is focused on the working muscles and away from the stomach. This makes digestion of foods difficult.

In fact, consuming a slowly absorbed sugar during these times will slow gastric emptying (the emptying of fluids and foods from the stomach to the blood stream) and in essence block fluids from being absorbed. This can actually cause dehydration.


The EFS drink formula uses two unique patented sources of calcium and magnesium as amino acid malates.

DiCalcium malate and DiMagnesium malate have superior bioavailability over other calcium sources. DiCalcium malate in a bioavailability study proved to be absorbed significantly better and remained elevated from time 0 to 12 hours, representing a more absorbable form for a longer period. Absorption rates were between 20% and 100% higher using DiCalcium and DiMagnesium Malate.

Furthermore, these superior minerals also offer a buffering of stomach acids. DiCalcium malate and DiMagnesium Malate lower stomach acids significantly, helping to reduce the unwanted gastric distress that can be associated with other minerals.


Endurance athletes have different fluid and electrolyte needs, particularly during longer and higher intensity training sessions and competition. The increased loss of sweat translates into an increased loss of electrolytes, and, as previously mentioned, sodium is one of the important electrolytes that must be replaced during exercise to prevent dehydration and hyponatremia.

The composition of standard sport drinks may not provide an adequate amount of electrolytes during activity lasting longer than two hours. Most standard sports drinks contain 50- 110 mg (200-460 mg/liter) of sodium per 8 oz.

Because we are limited on the amount of fluid the body can absorb by the intestines, it may be important to consume a higher amount of sodium during exercise to minimize fluid loss. The body can tolerate a higher sodium intake (closer to the amount lost in sweat) and it does not appear to negatively affect carbohydrate absorption.


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

A: Clinical research shows that athletes should consume about 200 calories, >1000mg Amino Acids, 400-600mg sodium and equivalent balance in all electrolytes should be taken every hour during exercise. EFS-LS is designed to maximize all these levels. At this rate a flask is sufficient for a two hour exercise bout. Because athletes vary greatly in their caloric demands it is best to try different levels to see which level works best for you.

Q: What is EFS Liquid Shot? 

A: EFS LS (liquid shot) is a new energy product that provides endurance athletes with the nutrients they need to fuel working muscles and increase endurance during exercise. The EFS formula utilizes the latest clinical research on endurance nutrition and input from some of the best endurance athletes in the world.

Q: How long after I open an EFS-LS do I have before I need to consume it?

A: The timeline begins once you take your first swig of the EFS liquid shot. Following your first swig, EFS LS should be consumed within 24 hours.

Q: What is the shelf life of EFS Liquid Shot?

A: The EFS liquid shot-shelf life is dependent on use. The jug, when poured into a flask or any other container is stable for 18 months from the date of manufacture. The expiration date is listed on the bottom. This shelf life is based on room temperature, though First Endurance does recommend refrigeration as an additional precaution. The flask shelf-life starts the minute you put your lips to the bottle. Because this introduces bacteria and because this is typically done during hot training sessions, First Endurance recommends consumption within 24 hours. Following your workout you can clean the flask and re-fill from the Jug.

Q: How is the EFS-LS different than most gels on the market?

A: Unlike the “gels” that are on the market, the EFS Liquid Shot does not contain any gelling agents, which slow down absorption and digestion. The EFS-LS also uses highly versatile and Eco-Friendly packaging that can be recycled and minimizes waste. EFS-LS delivers 400 super-charged calories that are fortified with over 1,500mg of electrolytes, 1,000mg amino acids and 100 grams of simple & complex carbohydrates- all in clinically effective doses.

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

A: EFS-LS contains 1g Free Form Amino Acids per serving which is the equivalent in BCAA and Glutamine profile to 5g Whey Protein. Protein naturally contains Branched Chain Amino Acids and Glutamine. Clinical evidence that shows the benefits of Branched Chain Amino acids and Glutamine during exercise dates back to 1991. These clinical studies show supplementing with as little as 1g Free Form Amino Acids improves performance, reduces post-exercise muscle damage, improves muscle glycogen resynthesis, reduces central fatigue and improves rate of perceived exertion.

Q: Can I re-use the flask?

A: Yes, the EFS Liquid Shot flask is resealable and refillable. Re-using the flask is eco-friendly because it minimizes waste. The EFS-LS flask can be cleaned in the dish washer. First Endurance offers a large 32oz Jug that can be used to refill flasks. The EFS Liquid Shot flask is also recyclable.

Q: How long does the large 32oz Jug last and how do I store it?

A: The large jug will refill six (6) flasks. It comes with an 18-month shelf-life and should be stored in a cool place once it’s been opened. Once the flask is filled it should be consumed within 24 hours unless it is stored in a refrigerator.



First Endurance offers everything an endurance athlete needs to maximize endurance and performance.  We designed it to work as a complete endurance system. Each product has a specific purpose and complements the others.

With First Endurance, there’s no more guesswork.