How to Use Cyclic Dextrin: A Complete Guide to Fast-Absorbing Carbohydrates for Endurance

Carbohydrates are the primary fuel for endurance athletes, powering long runs, rides, and training sessions. But not all carbs are created equal. While traditional options like maltodextrin have been staples, cyclic dextrin has emerged as a superior alternative for fast-absorbing energy without the gastrointestinal distress.

In this guide, we'll break down what cyclic dextrin is, how it compares to maltodextrin, and exactly how to use it for optimal endurance performance. You'll learn the right dosage, timing, and practical tips to fuel your next workout or race.

What Is Cyclic Dextrin?

Cyclic dextrin, also known as highly branched cyclic dextrin (HBCD), is a unique carbohydrate derived from tapioca or corn starch. Its structure features a cyclic backbone with branched chains, allowing it to dissolve easily in water and be rapidly absorbed by the body.

Unlike maltodextrin, which has a high glycemic index and can cause stomach cramps during intense exercise, cyclic dextrin has a lower osmolality. This means it draws less water into the gut, reducing the risk of bloating and gastrointestinal discomfort. For endurance athletes, this is a game-changer.

• Rapidly absorbed: Provides quick energy without digestive issues.
• High solubility: Mixes easily with water, making it ideal for hydration.
• Low osmolality: Minimizes stomach upset during prolonged exercise.

Cyclic Dextrin vs Maltodextrin: Key Differences

Maltodextrin has long been used in sports drinks and gels due to its affordability and high carbohydrate content. However, its high osmolality can lead to water retention in the gut, causing cramps and slowed absorption. Cyclic dextrin, on the other hand, has a lower osmotic pressure, allowing for faster gastric emptying and more efficient glycogen replenishment.

Studies suggest that cyclic dextrin can be absorbed more quickly than maltodextrin, providing a steadier supply of energy without the insulin spike. This makes it particularly beneficial for events lasting longer than 60 minutes, where maintaining blood glucose levels is crucial.

• Faster absorption: Cyclic dextrin enters the bloodstream quicker than maltodextrin.
• Less stomach distress: Lower osmolality means fewer cramps and bloating.
• Steady energy: Avoids the rapid spikes and crashes associated with maltodextrin.

How to Take Cyclic Dextrin for Workouts

The optimal dosage of cyclic dextrin varies based on your body weight, exercise intensity, and duration. As a general rule, aim for 30-60 grams per hour of endurance exercise. For a 70kg athlete, this translates to roughly 0.4-0.8 grams per kilogram of body weight per hour.

Mix cyclic dextrin powder with water in a shaker bottle, using about 500ml of water per 30 grams. Consume it gradually throughout your workout rather than all at once. Start with a small amount 15 minutes before exercise, then sip every 15-20 minutes to maintain energy levels.

For optimal results, combine cyclic dextrin with electrolytes and a small amount of protein. This can enhance fluid absorption and support muscle recovery. Products like the Myprotein x Promixx Single Wall Metal Bottle 950ml are perfect for mixing and carrying your drink.

Timing is crucial: consume cyclic dextrin before, during, and after exercise. Pre-workout, it tops up glycogen stores; during, it sustains energy; post-workout, it accelerates glycogen resynthesis. This makes it a versatile tool for endurance athletes.

• Dosage: 30-60g per hour, adjusted for body weight and intensity.
• Mixing: Use 500ml water per 30g and shake well.
• Timing: Sip every 15-20 minutes during exercise.
• Combine: Add electrolytes for better hydration.

When to Take Cyclic Dextrin During Exercise

The key to effective fueling is consistency. Start your workout with a small dose of cyclic dextrin (about 15-20g) to prime your system. Then, consume 15-30g every 30 minutes during prolonged exercise. This prevents glycogen depletion and keeps your energy steady.

During high-intensity interval training (HIIT) or long runs, your body relies heavily on carbohydrates. By providing a steady supply of cyclic dextrin, you can delay fatigue and maintain performance. For events lasting over two hours, increase your intake to 60g per hour.

Post-exercise, consume 30-60g of cyclic dextrin within 30 minutes to replenish glycogen stores. This is especially important if you have another training session within 24 hours. Pair it with a protein shake to enhance recovery.

• Pre-workout: 15-20g to prime glycogen stores.
• During: 15-30g every 30 minutes.
• Post-workout: 30-60g within 30 minutes for recovery.

Cyclic Dextrin for Glycogen Replenishment

Glycogen is the stored form of glucose in muscles and liver, and it's the primary fuel for endurance exercise. Depleted glycogen stores lead to fatigue and reduced performance. Cyclic dextrin's rapid absorption makes it an excellent choice for quickly restoring glycogen levels.

Research indicates that cyclic dextrin can replenish muscle glycogen faster than maltodextrin, making it ideal for athletes with back-to-back training days. By consuming cyclic dextrin post-exercise, you can speed up recovery and be ready for your next session.

For best results, combine cyclic dextrin with a source of protein, such as a whey or plant-based shake. This stimulates muscle protein synthesis and enhances glycogen storage. Products like the Ancient + Brave Wild Collagen Jar can add a protein boost to your recovery drink.

• Fast glycogen resynthesis: Ideal for multi-day training.
• Combine with protein: Enhances recovery and adaptation.
• Timing: Consume within the 'glycogen window' (30-60 min post-exercise).

Practical Tips for Using Cyclic Dextrin

To avoid digestive issues, always start with a lower dose to assess your tolerance. Gradually increase as your body adapts. Also, ensure you're properly hydrated, as cyclic dextrin draws water into the gut.

Use a shaker bottle with a tight lid to mix your drink thoroughly. For longer rides or runs, consider carrying a pre-measured pouch of cyclic dextrin to add to water on the go. This makes fueling convenient and consistent.

Cyclic dextrin can be used in a variety of ways: in drinks, gels, or even added to homemade energy bars. Its neutral taste makes it easy to incorporate into your routine without flavor fatigue.

• Start with a small dose to test tolerance.
• Stay hydrated: Drink plenty of water alongside cyclic dextrin.
• Pre-measure for convenience: Use a pill box or small containers.

Choosing the Right Cyclic Dextrin Supplement

When selecting a cyclic dextrin product, look for pure, unflavored versions to avoid artificial additives. Check the label for 'highly branched cyclic dextrin' as the sole ingredient. This ensures you're getting the real deal.

Consider your specific needs: if you're prone to stomach issues, opt for a product with added electrolytes to support hydration. For convenience, single-serve sachets are great for travel. The Cadence Sachets Race Grapefruit - Carton (5g x 30) - UK is an excellent option for on-the-go fueling.

Remember, cyclic dextrin is a supplement, not a replacement for a balanced diet. Ensure you're meeting your overall carbohydrate needs through whole foods as well.

• Look for pure HBCD – no fillers.
• Consider electrolyte-infused options for hydration.
• Single-serve sachets are perfect for training days.

Cyclic dextrin is a powerful tool for endurance athletes, offering fast absorption, minimal stomach distress, and efficient glycogen replenishment. By following the dosage and timing guidelines in this guide, you can optimize your fueling strategy and perform at your best. Whether you're a marathon runner, cyclist, or HIIT enthusiast, incorporating cyclic dextrin into your routine can make a significant difference. Explore our range of carbohydrate supplements to find the perfect fit for your training needs.