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Advanced multipurpose endurance supplement combining natural stimulants and adaptogens to maximize fat burn and boost performance.
Dispatch within 48 hours. Delivery time depends on your location.
Fusion is a powerful multipurpose supplement designed for endurance athletes who want to stay lean and energized. It allows you to manage weight effectively while keeping your performance on point.
With a potent blend of natural stimulants and adaptogens, Fusion improves fat oxidation, boosts VO2 max and reduces stress — ideal for athletes who want to lose excess weight and increase overall endurance.
Why adaptogens? Workout related stress is a major factor affecting both weight loss and performance. During training, rising stress levels increase cortisol, which slows fat loss and hinders performance. Fusion’s powerful adaptogen blend helps overcome these workout stress-related challenges, enabling you to lose weight faster and maintain peak energy.
Become leaner and faster with Fusion in just 2 weeks!
Take 3 capsules with water approximately 20 minutes before exercise.
On non-training days, take 3 capsules in the morning.
After three months of taking the product, it is recommended to take a 3-4 week break.
Instructions on how to combine different adaptogen products are found on this link.
Per serving (3 capsules)
RDA*
Green tea extract (95% polyphenols, 45% EGCG)
Panax ginseng (80% ginsenosides)
Rhodiola (3% rosavins, 1% salidrosides)
Cayenne pepper extract (10:1)
Ginger extract (10:1)
Dandelion extract (10:1)
Caffeine
Food supplement. Ingredients: Green tea extract (95% polyphenols, 45% EGCG) 540 mg, Korean ginseng {Panax ginseng (80% ginsenosides)} 30 mg, Rhodiola {Rodiola rosea (3% rosavins and 1% salidrosides)} 240 mg, cayenne pepper extract (10:1) 120 mg, ginger extract (10:1) 120 mg, grape seed extract (95% OPC**) 120 mg, dandelion extract (10:1) 60 mg, caffeine 60 mg. Other ingredients: vegan capsule; lubricant: magnesium salts of fatty acids. May contain traces of oats, barley, wheat (GLUTEN), ribs, milk (MILK) or soy (SOY). Caution: Contains caffeine! The product is not suitable for children, pregnant women and nursing mothers. The product is not a substitute for a balanced diet. Keep out of the reach of children. Contains caffeine. Store in a dry, cool place, away from heat, light, and moisture. Net quantity: 90 capsules. *Values are given per serving. **Oligomeric proanthocyanidins.
Who should take Fusion?Fusion is formulated for endurance athletes aiming to improve VO2 max and increase fat metabolism. It can also help reduce stress, improve focus, and increase ATP production. We also offer other adaptogen supplements formulated to target different benefits, such as improved sleep or increased testosterone. How long is a cycle of Fusion? A cycle of Fusion is three months. After one cycle, we recommend taking a three to four week break from taking Fusion.Why do I need to take a break after one cycle of Fusion?Cycling adaptogens helps prevent your body from developing tolerance and improves their long-term effectiveness. How long until I notice results from Fusion?The fat-burning benefits of Fusion are typically evident after one week of use, and VO2 max benefits after two weeks. However, individual responses may vary. Also note that it usually takes longer to see results in athletes over 65 years of age. Can I take Fusion in the evening? Fusion contains stimulants, including caffeine, which can interfere with sleep. We recommend taking Fusion at least 4 hours before bedtime. If you are sensitive to stimulants, it is best to take it in the morning or afternoon. If you want an adaptogen formula that does not contain stimulants, Absolute may be a better option for you.Can Fusion be taken before strength training?Yes, Fusion can support strength sessions as well as endurance training.Where is Fusion made?Fusion is manufactured in Slovenia. Ingredients are primarily sourced from the EU. Some ingredients may be sourced outside of the EU. In these cases, we follow rigorous quality control to ensure the safety and purity of all ingredients.Does Fusion work?Supplements like Fusion are supportive, not magical. Fusion is an aid to enhance your results. Hard training and proper nutrition are still key. How long do Fusion’s effects last after finishing a bottle?Some athletes continue to notice benefits after they stop taking Fusion, while others may experience a gradual decline in benefits. It depends on factors such as the athlete’s lifestyle, physiology, diet, and individual response.Does Fusion increase lung capacity?Not directly. VO2 max measures how efficiently your body uses oxygen, not lung size. Fusion supports oxygen utilization, which contributes to better performance.Are there independent studies on Fusion?There are no independent studies on the exact adaptogen combination in Fusion. Scientific studies cost a lot of money and, as this is a relatively new field, independent funding is not yet available. However, there are numerous studies on individual adaptogens, many of which are very positive.4Endurance has conducted internal studies that have shown positive results and progress in test subjects. These included professional athletes who took part in major competitions.However, we do not publish or refer to these studies, as they represent too small a sample, were conducted under ideal conditions, and, above all, were not independent or peer-reviewed. Ultimately, they could also be described as anecdotal.Why aren’t I losing weight on Fusion? Results with Fusion vary by individual. Some effects may appear within one or two weeks, while more noticeable changes usually take several weeks. No supplement is magic — regular exercise and a healthy diet are key to achieving results.How many servings of Fusion can I take per day?For best results and to avoid unwanted side effects, we do not recommend taking more than one serving (3 capsules) of Fusion per day.Can I take Fusion on rest days?For best results, Fusion should be taken on rest and training days. On rest or non-training days, take three capsules in the morning.Is Fusion vegan / allergen-free / gluten-free?Fusion is vegan and gluten-free. It does not contain common allergens like dairy or soy. If you have other allergies or sensitivities, please review the full ingredients list before use.How should I adjust my dose if I’m sensitive to stimulants?The normal recommended dosage of Fusion is three capsules. If you are sensitive to stimulants, we recommend starting with a lower dosage of one or two capsules to see how your body reacts. Can Fusion be taken with medication?Some combinations are safe, but avoid using Fusion with antihypertensives and blood thinners. If in doubt, consult your doctor.Can Fusion be taken with antidepressants?Fusion contains Rhodiola, which contains compounds that can act on serotonin and dopamine pathways, potentially raising the risk of serotonin syndrome when taken in combination with serotonergic antidepressants (such as SSRIs, SNRIs, or MAOIs). However, the dosage present in Fusion is extremely low and is generally not sufficient to significantly affect these neurochemical pathways. Because of this, it should be safe to take Fusion with antidepressants. However, always consult with your doctor before taking supplements. Can Fusion be combined with other products?Fusion can be used with some other supplements and nutrition products, such as most fueling gels and drinks, protein and recovery products, creatine, fat burners, collagen, and vitamins and minerals. However, care should be taken when combining Fusion with other products that contain adaptogens or stimulants. See our Adaptogen Usage Guide for more information.Is Fusion WADA compliant?Yes. Fusion is free from banned substances, regularly checked, and manufactured in a GMP-approved facility with highest ISO 22000 standard. Furthermore, our suppliers also have a certificate confirming that their products are free of impurities. Can minors use Fusion?Fusion is not recommended for minors because it contains caffeine and adaptogens. Adaptogens can influence stress hormones, thyroid function, and sex hormones, which are particularly sensitive during growth and development.What are the side effects of Fusion? Fusion contains stimulants, including caffeine. Even though it also contains L-theanine to balance the effects of caffeine, Fusion may still cause some side effects in people sensitive to stimulants. These side effects may include increased sweating, jitteriness, increased heart rate, upset stomach, or increased anxiety. If you are sensitive to stimulants, we recommend you start with a lower dosage of Fusion to see how your body reacts. Some people report a loss of libido after taking supplements containing rhodiola. If you suspect that this can be the case, please stop taking Fusion.Can Fusion cause stomach issues?In some cases, some adaptogens can cause mild GI upset, diarrhea, or heartburn, especially on an empty stomach. Take it during or after a meal if needed. Discontinue use if symptoms persist and consult your doctor.Can I drink alcohol while taking Fusion? Consuming alcohol in moderation while taking Fusion should be safe. However, it should be done with caution. Fusion contains stimulants, which may mask alcohol’s sedative effects, leading to increased alcohol consumption and risk of alcohol poisoning or accidents. Alcohol may also counteract some of the benefits of Fusion, such as reducing stress. Further, the effects of combining adaptogens and alcohol have not been well-studied, so it could pose other risks.
I take this supplement before training because it gives me that extra boost of energy I need to tackle even the toughest sessions. It also helps me stay focused during races and cuts down on fatigue, which lets me perform at my best in mountain running competitions.
I have been supplementing with Fusion for 3 years now especially before hard sessions and before / during races. I find a noticeable difference when I take it in a reduction of perceived exertion and a significant delay in fatigue. I implement it as a supplement before threshold / max effort sessions.
Fusion is the perfect supplement to help me during my pre-competition tapering period. Fusion helps me burn fat more efficiently while maintaining optimal energy levels.
Great product. I feel more focused, less mentally tired, and I have more stamina. I also appreciate how clean it is: natural ingredients, no doping, and it goes down really well.
As an elite cyclist, I use Fusion during heavy training blocks. It helps me stay sharp even when fatigue builds up — I recover faster, stay mentally focused late in sessions, and feel a clean energy boost without any crash. It’s a key part of how I manage training load and maintain performance.
FUSION is the supplement I most often use before long training sessions. These are LSD (long slow distance training) sessions or Ironman-specific workouts, where the intensity is somewhat lower.
Whether you’re a cyclist pushing for a better power-to-weight ratio, a runner looking to improve performance, or a triathlete pushing through a high-stress training schedule, Fusion helps you stay lean while boosting your endurance.
Fusion combines natural stimulants and adaptogens to help you burn fat, increase energy, and stay in peak condition by:
This formula helps you stay lean and energized — without aggressive ingredients.
You’ll notice increased fat burn and reduced water weight within the first week. After two weeks, adaptogens reach full effect, helping you increase VO2 max, reduce stress, and recover faster.
Rich in polyphenols — especially catechins — green tea helps improve metabolic flexibility and fat oxidation. This means your body can use more fat instead of carbohydrates for fuel, preserving glycogen stores. It also improves glucose tolerance and insulin sensitivity, allowing for more efficient energy use. Some studies show a caffeine-like increase in perceived energy without overstimulation. Thanks to increased mitochondrial ATP production, green tea extract supports sustained energy output during endurance activities.
A natural energizer that helps reduce fatigue and elevate energy levels. Ginseng enhances cellular energy production and reduces oxidative stress, helping athletes feel less drained during and after exercise. It's especially useful for long training periods when mental and physical fatigue starts to build up.
Protects the body from stress, reduces fatigue, increases psychophysical strength, and improves mental processes. Increasing VO2 max through an improved stress response is the best long-term progress strategy in endurance sports.
Known for its thermogenic effect, cayenne increases fat metabolism and can help your body burn more calories. It activates the TRPV1 receptor, which enhances the conversion of stored fat into energy and slightly raises body temperature — giving your performance a subtle but valuable metabolic boost.
Ginger is a powerful ingredient that reduces muscle soreness and accelerates recovery. It also boosts circulation, improving the delivery of oxygen and nutrients to muscles. As a mild thermogenic and natural stimulant, ginger offers a gentle energy lift without overstimulation. It may even reduce stomach discomfort from high-carb fueling.
Although research is still limited, grape seed extract is believed to improve blood circulation and potentially aid in reducing body fat. While results vary, it’s included for its possible synergistic role in supporting endurance metabolism and vascular function.
A natural diuretic that helps flush out excess sodium and reduce water retention. This can lead to a leaner appearance and reduced bloating, especially during high-carb or salt-heavy phases.
Caffeine improves focus, increases fat utilization, and delays fatigue by reducing the perception of effort. It also enhances carbohydrate absorption, supports dopamine release, and provides a proven ergogenic effect.
I’m totally blown away by this product. It really helps with weight loss/ fat burn and increase av Vo2 max. Little over 2 weeks since I started and I lost 3 kilos and my power output is a great bit higher than before. I can train more effectively and stay in higher power zone longer than before. Will definitely keep using Fusion.
Hello Sabrina, thank you for your feedback! We are so happy to hear your thoughts on Fusion, your results are really amazing! We would love to hear more from you, contact us anytime :) Keep on crushing!
Fusion
Best natural fat burner I've tried. It has increased my VO2 max, strength, and endurance.
Meglio prenderlo prima o dopo aver fatto colazione?
Bonjour pouvons-nous combiner ces deux produits? merci d'avance
Lo uso da un po’ e la cosa che noto subito sono i miglioramenti che hai nella respirazione in gara ed in allenamento e questo ti permette di allenarti ad un livello superiore da runner amatoriale.
To provide elite-level nutrition at accessible prices for all. We follow the latest science in sports nutrition and use only high-quality ingredients that support your performance. From amateur enthusiasts to professional teams, we support athletes of all levels in reaching their goals.
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