Dextrose: What is it? – Fitness World Nutrition

Dextrose, also known as glucose, is a simple sugar that plays an important role in the diet of athletes and bodybuilders. But what exactly is dextrose? How does it affect the body? And how can you use this energy powder to optimize your performance and recovery? Here are the characteristics and benefits of dextrose, as well as the best ways to incorporate it into your fitness routine.

What is dextrose?

Dextrose, or glucose, is a simple sugar usually derived from corn starch, but it can also be extracted from other plant sources such as rice, potato, or wheat. It comes in a crystalline powder form that is water-soluble and has a slightly less sweet taste than sucrose (common table sugar).

Due to its rapid absorption by the body, dextrose is frequently used in medical and sports fields. This molecule provides a quick source of energy for cells, especially muscle cells, and particularly those in the brain and muscles. It therefore provides quick fuel during intense physical exertion. This is why dextrose is often found in energy drinks, energy bars, and other dietary supplements for athletes.

Dextrose and the body

When consumed, dextrose quickly enters the bloodstream and increases blood glucose levels (glycemia). When this level reaches a sufficiently high point, it triggers the release of insulin from the pancreas. Insulin then plays a crucial role in regulating blood glucose: it allows the body's cells to absorb glucose and use it as an energy source.

Dextrose therefore has a high glycemic index, meaning it causes a rapid increase in blood glucose, followed by an equally rapid insulin secretion. This characteristic makes it a preferred sugar during periods of intense exertion and post-workout recovery, as it quickly supplies energy to muscles and promotes their rebuilding.

Dextrose and bodybuilding

An immediate energy source

One of the main advantages of dextrose for bodybuilders is its ability to quickly provide energy to muscles. During intense physical exertion, such as a weight training workout, the muscles being used consume their glycogen reserves (the form of glucose stored in muscles and the liver). When these reserves are depleted, performance can decline and fatigue can set in. To prevent this, dextrose can be used to provide an immediate source of energy to muscles, delay the feeling of fatigue, and maintain optimal performance levels.

Promoting post-workout recovery

Dextrose also plays an important role in the recovery phase after training. It quickly replenishes glycogen reserves depleted during exercise, which facilitates the rebuilding of damaged muscle fibers and speeds up recovery. Furthermore, the insulin secretion caused by dextrose consumption promotes protein synthesis and thus stimulates muscle growth.

This is why it is common to consume a mixture of dextrose and protein at the end of a weight training session: in combination with the amino acids provided by proteins, the glucose contained in dextrose represents an ideal fuel to promote recovery and accelerate gains in strength and muscle mass.

How to use dextrose in bodybuilding?

Generally, dextrose is found in powder form to be diluted in water or incorporated into a protein drink. There are also gels or energy bars containing this ingredient, which can be more convenient to consume during a workout or competition.

Dextrose before training

Approximately 30 to 60 minutes before exercise, mix 25 to 50 grams of dextrose with water or a protein drink. This intake will help you start your session with readily available energy reserves.

Dextrose during training

To fully benefit from dextrose during exercise, it is recommended to incorporate it into an energy drink that you will consume throughout your workout. Here is a simple recipe to prepare 1 liter of drink:

50 g of dextrose
5 g of salt (to compensate for sodium loss due to sweating)
1 liter of water

Mix everything and feel free to add a few ice cubes if you prefer your drink cold. By drinking regularly during your session, you will provide your muscles with the energy they need to perform at their maximum.