SIS (Science in Sport)

Science in Sport (SiS): energy gels, sports drinks and protein shakes

Science in Sport (SiS) is a British sports nutrition brand, founded in 1992, that makes products for endurance athletes such as cyclists, runners and triathletes. The range consists of energy gels, sports drinks with carbohydrates and electrolytes, electrolyte tablets, bars and protein shakes for use before, during and after training.

At LUTO Supplements you will find the GO range, the Beta Fuel range, the Hydro range and the REGO range from SiS. Below you will read what is in each product line, such as the amount of carbohydrates, sodium and caffeine per serving, so that you can easily compare the products.

GO Isotonic Energy Gel: 22 grams of carbohydrates per gel

The SiS GO Isotonic Energy Gel is a 60 ml gel with 22 grams of carbohydrates from maltodextrin. The gel is isotonic: the concentration is matched to that of body fluids, so you do not need to drink water with it. The standard gel contains no caffeine and is available in flavors such as Lemon & Lime, Orange, Apple, Tropical, Cherry, Blackcurrant and Pink Grapefruit. If you want to try multiple flavors, choose the GO Isotonic Energy Gel Variety Pack.

GO gels with caffeine or electrolytes

In addition to the standard GO gel, there are two variants with the same 22 grams of carbohydrates per gel. The GO Isotonic Energy Gel + Caffeine contains 75 mg of caffeine per gel (Cola and Berry flavors); the Double Espresso variant contains 150 mg of caffeine per gel. The GO Isotonic Energy Gel + Electrolyte contains 118 mg of sodium, 9.5 mg of potassium and 1.5 mg of magnesium per gel, including flavors such as Raspberry and Salted Caramel. Caffeine-containing gels are not recommended for children and pregnant women; pay attention to your total caffeine intake throughout the day.

Beta Fuel Gel: 40 grams of carbohydrates per gel

The SiS Beta Fuel Gel contains 40 grams of carbohydrates per 60 ml gel, from maltodextrin and fructose in a ratio of 1:0.8. The Beta Fuel range is intended for long endurance activities such as marathons, triathlons and long bike rides. There are three variants: the standard gel (Strawberry & Lime, Orange and Neutral), the Beta Fuel + Electrolyte Gel with 200 mg of sodium per gel, and the Beta Fuel Gel + Nootropics with 200 mg of caffeine, 200 mg of L-theanine and 1 g of taurine per gel. Due to the caffeine content, a maximum of 1 gel per day applies to this last variant.

Beta Fuel 80 and Beta Fuel Energy Chew Bar

Prefer drinking over gels? A sachet of Beta Fuel 80 provides 80 grams of carbohydrates per bottle, also from maltodextrin and fructose. The Beta Fuel Energy Chew Bar is a 60-gram chew bar with 45 grams of carbohydrates from glucose and fructose (1:0.8), divided into six pieces of approximately 7 grams of carbohydrates.

GO Energy Bar and GO Energy Bake

For those who want to eat something solid on the go, there are the GO Energy Bar with 25 grams of carbohydrates per bar based on oats, and the GO Energy Bake, a soft filled cookie of 50 grams with 30 grams of carbohydrates.

Hydro range and GO Electrolyte: electrolytes with and without carbohydrates

The SiS Hydro Tablets are sugar-free effervescent tablets that you dissolve in 500 ml of water. Each tablet contains 345 mg of sodium, 65 mg of potassium, 102 mg of calcium and 8 mg of magnesium; the Cola + Caffeine variant additionally contains 75 mg of caffeine per tablet. The Hydro+ Drink Mix is a 4.1-gram powder sachet with, among other things, 350 mg of sodium, 750 mg of chloride and 300 mg of potassium. SiS GO Electrolyte is a sports drink powder with 36 grams of carbohydrates per 40-gram serving in 500 ml of water, supplemented with sodium, potassium, calcium and magnesium.

REGO and BETA Recovery: protein drinks for after training

For after training, SiS offers three protein drinks. REGO Rapid Recovery provides 20 grams of protein and 23 grams of carbohydrates per serving, supplemented with vitamins and minerals. REGO Clear Whey Isolate is a clear, lemonade-like drink with 20 grams of protein from whey isolate. BETA Recovery provides 60 grams of carbohydrates (maltodextrin and fructose in a ratio of 1:1) and 30 grams of whey protein per 100 grams of powder.

Informed Sport and use

The SiS products in our range are Informed Sport certified: batches are tested for substances on the list of banned substances in sports. How many gels or drinks you use depends on the duration of your training or race and your personal preference; always follow the directions for use on the packaging. You can read a comparison with another brand in our blog SiS vs Maurten: which energy gel suits you.