SiS
Beta Fuel + Nootropics Gel 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 containing caffeine (200 mg), L-theanine (200 mg), taurine (1,000 mg), and Cognizin® citicoline (250 mg). It is suitable for running, cycling, triathlon, marathon, ultra-marathon, and Ironman events.

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

Each gel contains 200 mg of anhydrous caffeine — a relatively high dose, roughly equivalent to two strong cups of coffee. The formula also includes 200 mg of L-theanine, which may help reduce the jitteriness and discomfort sometimes 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 provides 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 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 training or racing. The gel is designed for efforts lasting more than 2 hours — such as during a marathon, triathlon, or long sportive — when mental fatigue compounds physical fatigue. It is not recommended to take before sleep 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 racing, when mental support is needed alongside an energy boost.

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

According to the manufacturer, the product contains no allergens. The formula is free from gluten, lactose, nuts, soy, and other common allergens, making it suitable for individuals with food allergies or intolerances. Those with a 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, specifically designed to minimise gastrointestinal discomfort. This system allows the body to efficiently absorb high quantities of carbohydrates without overloading a single intestinal transport channel. According to the manufacturer, the product is also suitable for those with a sensitive gut, although individual tolerance may vary — particularly during first use under intense exercise conditions.

One gel (60 ml) contains 159 kcal. The caloric content comes exclusively from carbohydrates — the gel contains no fat or protein. This caloric density is ideal for rapid mid-exercise fuelling without unnecessarily burdening the digestive system with fats or proteins, which take considerably longer to digest.

The gel is primarily intended for experienced endurance athletes — marathoners, ultra-marathoners, triathletes, cyclists, and Ironman competitors — undertaking efforts lasting more 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. Recreational athletes with shorter training sessions may find the caffeine dose unnecessarily high for their needs.

L-theanine (200 mg) is an amino acid naturally occurring in green tea that may help reduce the unwanted side effects of caffeine — most notably jitteriness and feelings of anxiety. The combination of 200 mg caffeine and 200 mg L-theanine in a 1:1 ratio is widely regarded in the scientific literature as synergistic — caffeine promotes alertness and performance, whilst L-theanine helps sustain focus without the undesirable stimulatory 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 has been developed to remain palatable even during intense physical exertion, when taste sensitivity is often altered. The refreshing, tangy taste also helps to offset the sweetness that comes with 40 g of carbohydrates per serving.

One pack (60 ml) contains exactly 1 serving. It is a single-serve format designed for direct consumption during training or racing. For longer events such as Ironman or ultra-marathons, you will need to carry as many gels as required to meet your planned total energy and carbohydrate intake, with the Nootropics version recommended primarily for use during the later stages of your effort.

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 caffeine per serving, it is advisable to monitor your total daily caffeine intake from all sources (coffee, tea, other supplements). According to EFSA, the recommended safe upper limit for caffeine intake in healthy adults is 400 mg per day.