Best energy gels - Quick hits of carbohydrates for all your athletic endeavours

Bonking, hitting the wall, blowing up, running out of gas, the wheels falling off. Whatever you call it, it's an unpleasant feeling that most athletes have experienced. It's technical term is exercise-induced hypoglycaemia, and it's caused by your body's glycogen stores becoming depleted. Luckily it's easily preventable with the help of the best energy gels.

Like the best energy bars and the best energy drinks, gels are designed with one primary goal in mind, and that is to provide you with easy-to-process carbohydrates. This is usually in the form of glucose, sometimes with added fructose, which your body converts to glycogen. This glycogen is then processed by the cells in your muscles to create energy, which in turn is used to turn the pedals, take the next stride, swim the next stroke… pick your poison. 

As we explain in our in-depth guide to cycling nutrition, your liver and muscles can only store a certain amount of glycogen, enough for around one to two hours of work depending on how trained you are. If you were to continue to exercise beyond that limit without refuelling, the result - the bonking mentioned earlier on - will not only affect your ability to push on the pedals, but your cognitive ability too, with symptoms including nausea, extreme physical weakness, poor coordination, and dizziness.

Of course, the failure to fuel your workouts is a performance-reducing, potentially dangerous mistake, but somehow, many are surprised to find that optimally fuelling your workouts can do the opposite and actually help you improve your performance. This is especially important if you want to perform your best day after day, recover quickly ahead of the next session and crush your goals. 

So that's the why, now for the what. Or perhaps more specifically, the which. Which are the best energy gels? What separates a good one from a bad one? To answer these questions and more, I've spent the past few months testing, tasting and researching in a bid to find which provide the greatest boost, which is the easiest to eat on the go, which is the best for our environment, which tastes the best, and more. 

Best energy gels available today

Torq's simply-named TorqGel is built as part of a wider Torq ecosystem of gels, bars, chews and drinks, from each of which, a single serving contains a nice, round 30 grams of carbohydrates, comprising the widely-accepted-as-optimal 2:1 ratio of glucose to fructose. Given that the body can theoretically transport up to 90 grams of carbohydrates (in that 2:1 mix) per hour, the maths is super simple. Just eat three servings per hour of whatever variety of Torq products you like. 

But preschool-level maths isn't the only reason that Torq gets an inclusion here though. A separate loop of material joins the easy-rip tab, meaning it then stays attached (unless you're really vigorous with your ripping) and doesn't become litter. 

The standard TorqGel product doesn't come with any added extras, but a separate version is available with Guarana, which contains caffeine, but doesn't taste quite as bad.  

Where the SIS Go Isotonic energy gel stands apart from others is in that word 'isotonic'. This refers to the gel's osmolality, and an isotonic product essentially means it shares a similar concentration of fluid, sugars and salt to blood, which in turn means it will be easier to digest. 

Of all the energy gels tested during our research, this certainly felt like one of the safest, both with regards to its ease of consumption and digestion, and also with its extremely mild, slightly fruity taste. 

The only downside is that, at just 22g of carbs, all of which come entirely from glucose, it's not going to light the afterburners like some of the others listed here, so it's probably better suited to longer events. 

The key reason for including Beta Fuel is for its modern thinking around the glucose to fructose ratio. We've explained the details below, but instead of a 2:1 ratio, Beta Fuel uses a ratio of 1:0.8, essentially increasing the percentage of fructose. In doing this, SIS has also increased the amount of carbs per gel to a fairly-potent-by-comparison 40g. 

In addition to this, some Beta Fuel gels also get the addition of nootropics, which is a fancy term for supplements that enhance cognitive performance. These include Cognizin Citicoline, 200mg caffeine, 1g Taurine and 200mg Theanine. These add a bitter chemical taste, but it's certainly not the worst out there. 

This follows a similar approach to the Maurten gel below, and we've awarded them both the best for maximising fuel intake, since they both operate on the same principles. However, if you want to save money or want to take advantage of the added supplements, try Beta Fuel first. 

SIS might be the better-known brand, but Maurten was the first to create a gel with a 1:0.8 ratio of glucose to fructose, and it's a brand that is not afraid to follow science to improve its product. To this end, the Gel 100 is more like jelly than gel thanks to its Hydrogel formula which is made using pectin (from fruit fibre) and alginate (from seaweed). 

Don't worry, it doesn't taste like seawater. In fact, it actually tastes like nothing, which is probably a good thing given the offensive taste some gels have. The rip-off tab is slightly awkward in that it's just a serrated corner, rather than the defined tab shape used by others. It does make it pretty easy to rip it half-off though, reducing the chance of litter. 

The Gel 100 is called as much because of this ratio, which Maurten says allows your body to absorb 100g of carbohydrates per hour (the maths actually works out at 108g). Each gel contains 25g of the stuff, so you can have four per hour. The one downside to this is that at £32.40 ($43.20) for a box of 12, things can get pretty expensive pretty fast. 

We've awarded Maurten 100 and SIS Beta Fuel the same 'equal best' title for maximising fuel intake since they both operate on the same principles. If you're worried about taste, this is the one to choose. 

Rawvelo as a brand prides itself on promising natural and organic ingredients and no preservatives, artificial flavours or colouring. This, coupled with the comparatively low carbohydrate content makes the Rawvelo gel our pick as the best for those with sensitive stomachs. 

You might also notice I've broken my own rules and marked the eco-friendliness as Amber+. This is because while the packaging is recyclable, the rip-off tab still comes clean off and is hard to avoid it becoming litter. The plus is awarded because Rawvelo pledges one per cent of its annual revenue to economical causes. 

However, given the unconfirmed nature of the gel's carbohydrate composition, you have no certainty over whether you're fuelling with glucose or fructose. Given the ingredients, we'd hazard a guess that it's a mixture of both, but there's no way to be sure. Therefore, if you're planning on trying to maximise your fuel intake against your body's limits, you might want to look elsewhere. 

Gu's gels are perhaps most famous for their wide choice of different flavours featuring some weird and wonderful options, including birthday cake, campfire 'smores and espresso - all of which are vegan. 

However, the composition of the gel you consume very much depends on the flavour you choose. You do get a mix of glucose and fructose, but the exact ratio varies, as does the total carb content per serving. The gels also come with added amino acids, and some flavours get added caffeine. 

As with the Rawvelo option above, this uncertainty over the fuel means they're not the best energy gels for athletes looking to maximise fuel intake, but if you're simply looking for a hit of added fuel and want to mix things up with flavours then Gu is your friend. 

The main downside to be aware of with Gu is that while the flat packaging is good for pocket space, it can be sharp on the inside of the mouth and cause cuts. 

Wiggle Nutrition is the in-house offering borne out of the retail behemoth that is Wiggle CRC. It's not got the brand clout of Torq and SIS, nor does it have the scientific brains of Maurten, but it's found a spot on this guide thanks to its impressive value for money. 

With our carbs-per-pound value working out at nearly four times as high as the Maurten option, if you're planning on riding long distances - or riding frequently - and you're on a budget, then this might well be the convenient option for you. 

However, if you're really focussed on cost, keep reading for our make-your-own fuel. 

The main problem with all of the best energy gels is that they are single-use items. With costs of more than £1/$1/€1 per gel for most of the options listed above, and the suggested dosage being up to four per hour, if you're planning on fuelling a full season of training and racing, it will very quickly become an expensive endeavour. It will also create a tonne of rubbish that, while recyclable, still takes energy to produce and recycle. 

Each of the above is made using a mix of glucose, perhaps some fructose, some brands add a bit of sodium, others add caffeine, and a flavour. All things that you can buy online cheaply. With a set of weighing scales and a browse of Amazon, it's entirely possible to buy all of the necessary ingredients and make your own. You can make it like a drink and put in a standard bottle, or if you prefer to keep those filled with water, a soft flask acts like an oversized gel packet. 

Sure, it's a bit more time consuming than grabbing a pre-made gel, and it takes a bit of learning, but it's a darn sight cheaper. You can add in a gelling agent to make it more gel-like if you really want to replicate the gel texture, but when I do this, I save the extra money and leave it as a liquid. 

You'll need the following: 

• A soft flask. Sometimes known as a folding bottle. The sort you might find as the hydration bladders in a running vest are great, but make sure you don't have one with an annoyingly long hose
• Some weighing scales (so you can weigh out your sugar mix)
• Water
• Dextrose (which is another word for glucose) or maltodextrin (a chain of dextrose molecules which is easier on the stomach).
• Fructose (assuming you want to optimise the carbohydrate ratio)
• Alternatively, you can use Sucrose (table sugar) which is a super cheap mix of 1:1 of the above and add dextrose as required. 
• Table salt (optional, for adding electrolytes)
• Sugar-free cordial (for flavouring)

What do the specs mean?

Carbs per gel: In grams, how many carbohydrates are you getting per each gel?

Carbs per £: Taking into account the amount of carbs per gel, and dividing it by the cost for a single serving, how expensive is this likely to become?

G:F ratio: This relates to the Glucose to Fructose ratio. With the body's ability to process 60 grams of glucose and a further 30+ grams of fructose per hour, it's useful to know what ratio is provided in each serving to help you fuel efficiently.  

Added extras: Does the gel add in any other performance-enhancing ingredients or technologies such as caffeine. 

Strength of taste: With taste being a personal preference, I've chosen to quantify strength of taste instead. Here I've opted for four tiers: Mild, slightly strong, strong, and very strong.
I hope this will be a better indicator of whether something is palatable or polarising. 

Eco-friendliness: Given the potentially large quantity of gels you will consume in a year of training and racing, the waste and litter you produce could be high. As a result, the eco-friendliness score is a three-tiered traffic light system I've devised. Starting at red, a product moves to amber if it's recyclable or if it features a litter-free design. A green score will be awarded to those that do both. 

Vegan: All gels listed in this guide are suitable for vegans

How to choose the best energy gels for you