SiS
Beta Fuel + Nootropics Gel 6 x 60 ml

SiS Beta Fuel + Nootropics Gel is an energy gel designed for endurance athletes during long training sessions and races lasting more than 2 hours. Each gel delivers 40 g of carbohydrates from a dual source (maltodextrin + fructose) and a nootropic complex featuring caffeine (200 mg), L-Theanine (200 mg), taurine (1,000 mg), and Cognizin® citicoline (250 mg). It is suitable for running, cycling, triathlon, marathon, ultramarathon, and Ironman events.

One gel (60 ml) contains exactly 40 g of carbohydrates, of which 19 g are sugars. The carbohydrates come from maltodextrin (30%) and fructose (24%) in an optimised 1:0.8 ratio. This ratio maximises energy absorption via two separate intestinal transport mechanisms, enabling carbohydrate intake of 80–120 g per hour when combined with other products from the Beta Fuel range.

One gel contains 200 mg of anhydrous caffeine. This is a relatively high dose, equivalent to approximately two strong cups of coffee. The formula also includes 200 mg of L-Theanine, which may help to reduce the jitteriness and discomfort associated with higher caffeine intake. For this reason, it is recommended not to exceed 1 gel per day and to account for any additional caffeine sources when monitoring your total daily intake.

Cognizin® citicoline is a patented, clinically tested form of citicoline — a compound that supports cognitive function and mental performance. Each serving contains 250 mg. Citicoline is classified as a nootropic and is included in the formula alongside taurine, caffeine, and L-Theanine to support focus, alertness, and decision-making ability during the later, mentally demanding stages of long races or training sessions.

As recommended by the manufacturer, consume 1 gel per day, ideally during prolonged endurance activity or in the later stages of a training session or race. The gel is designed for efforts lasting more than 2 hours — such as during a marathon, triathlon, or long ride — when mental fatigue compounds physical fatigue. It is not recommended to consume close to bedtime due to its 200 mg caffeine content.

The key difference lies in the nootropic complex. The standard Beta Fuel Gel primarily delivers 40 g of carbohydrates from maltodextrin and fructose in a 1:0.8 ratio, but contains no nootropics. The + Nootropics version adds 200 mg caffeine, 200 mg L-Theanine, 1,000 mg taurine, and 250 mg Cognizin® citicoline. The Nootropics version is therefore better suited to the later stages of a race, when mental support is needed alongside an energy boost.

The gel's ingredient list contains no animal-derived ingredients — the product contains water, maltodextrin, fructose, L-taurine, Cognizin® citicoline, caffeine, L-Theanine, acids, gelling agents, and preservatives. Based on these ingredients, the product is suitable for both vegans and vegetarians. We recommend checking the current label to confirm suitability, as formulations may be subject to change.

According to manufacturer information, the product contains no allergens. The ingredient list is free from gluten, lactose, nuts, soy, and other common allergens, making it suitable for those with food allergies or intolerances. Individuals with sensitivity to caffeine or any component of the nootropic complex are advised to consult a healthcare professional before use.

SiS Beta Fuel utilises a multiple transportable carbohydrates (MTC) system with a maltodextrin:fructose ratio of 1:0.8, designed to minimise gastrointestinal discomfort. This system allows the body to absorb high amounts of carbohydrates efficiently without overloading a single intestinal transport channel. According to the manufacturer, the product is also well-tolerated by those with a more sensitive digestive system, although individual tolerance may vary, particularly during first use under high-intensity conditions.

One gel (60 ml) contains 159 kcal. The energy content comes exclusively from carbohydrates — the gel contains no fats or protein. This caloric density is ideal for rapid energy replenishment during exercise without placing unnecessary strain on the digestive system from slower-digesting fats or protein.

The gel is primarily intended for experienced endurance athletes — marathon runners, ultramarathon runners, triathletes, cyclists, and Ironman competitors — undertaking efforts longer than 2 hours. Due to its high caffeine content (200 mg), it is not suitable for individuals sensitive to caffeine, pregnant or breastfeeding women, or those under 18 years of age. For recreational athletes with shorter training sessions, the caffeine content may be unnecessarily high.

L-Theanine (200 mg) is an amino acid naturally found in green tea that may help to reduce the unwanted effects of caffeine — particularly jitteriness and anxiety. The combination of 200 mg caffeine and 200 mg L-Theanine in a 1:1 ratio is considered synergistic in the scientific literature — caffeine promotes alertness and performance, while L-Theanine helps maintain focus without the unwanted stimulant side effects.

SiS Beta Fuel + Nootropics Gel is available in a lemon-lime flavour. This citrus flavour is characteristic of the Beta Fuel range and is designed to remain palatable even during intense physical exertion, when taste sensitivity may be altered. The refreshing, tangy taste also helps to offset the sweetness from the 40 g of carbohydrates in the gel.

The manufacturer recommends consuming a maximum of 1 gel per day and not exceeding the recommended daily dose. Daily use is not contraindicated; however, given the 200 mg of caffeine per serving, it is advisable to monitor your total daily caffeine intake from all sources (coffee, tea, other supplements). The recommended safe upper limit for caffeine intake for healthy adults is 400 mg per day, according to EFSA.