Our Authentic Nutrition FAQ

The list of ingredients and nutritional values for each of our products can be found on each product page, under the "nutritional values" and "composition / advice" tabs.

It depends on the products. Most products do not contain gluten, but some do. Please refer to the details provided in the product sheets.

No, Authentic Nutrition products do not contain palm oil, including energy and protein bars.

No, Authentic Nutrition products do not contain glucose syrup, but rather fructose, maltodextrin, and agave syrup, depending on the product.

Our energy bars, Flapjack, and Boost Bar, preparation drinks and cream (Carbo Powder, Carbo Start) and recovery drink are perfectly suitable for vegetarians.
However, our effort drinks, gels, and gummies (Booster +, Boost Gel, Boost Gums) and protein bars (Recovery Bars) are not suitable for vegetarians as they contain animal-derived BCAAs or hydrolyzed beef collagen.

Our vegan products: preparation drink, Carbo Powder, and our raspberry Flapjack and tarte tatin energy bars.

Our non-vegan products: energy cream (Carbo Start), effort drink (Booster+), energy gel (Boost Gel), energy gummies (Boost Gums), chocolate Flapjack energy bars, protein bars (Récup Barres), recovery drink (Authentic récup).

All Authentic Nutrition products are manufactured in France, in Auvergne-Rhône-Alpes, and are developed by our qualified dietician-nutritionist - with the exception of energy gummies (Boost Gums) and energy cream (Carbo Start) which are manufactured in the European Union.

Yes, all Authentic Nutrition products comply with the European anti-doping standard NF EN 17444, which came into force in June 2021 (replacing standard NF V94-001).

Electrolytes are mineral salts found in the blood and within cells: sodium, potassium, calcium, and magnesium. Some of these mineral salts are lost during physical exertion (especially through sweat). Therefore, supplementation during exercise is highly recommended, particularly in hot weather and/or during prolonged exertion.

Maltodextrin is a complex sugar composed of a long chain of glucose or fructose molecules. Unlike simple sugars (also known as fast sugars), such as glucose, fructose, lactose, and sucrose, maltodextrin provides a more constant sugar supply, thus avoiding major carbohydrate fluctuations (hypoglycemia/hyperglycemia). Maltodextrin also has a less sweet, more neutral taste than simple sugars, which helps prevent nausea.

BCAAs (Branched Chain Amino Acids) are branched-chain amino acids composed of leucine, isoleucine, and valine. They are essential amino acids that the body cannot produce. Their consumption during long-duration exercise reduces the breakdown of active muscles, minimizes the depletion of glycogen stores, and decreases the phenomenon of "central nervous fatigue."

Carbohydrates refer to sugar molecules. It is another name for carbohydrates, which are divided into simple and complex carbohydrates.

Glycogen is glucose stored by the liver and muscles, forming a significant reserve of glucose for the body. Muscle glycogen primarily serves to provide glucose during physical exertion. Liver glycogen serves to provide glucose to the brain, its sole energy source.

Collagen provides great elasticity and makes tissues more resilient. It contributes to tissue regeneration and reduces joint pain.

Antioxidants are molecules naturally present in many foods that prevent or slow down oxidation by neutralizing free radicals. These damage our cells, including DNA, and are notably responsible for cell aging.
Examples of antioxidants: vitamins A, C, E, zinc, selenium, manganese...

The glycemic index, also called "dextrose equivalent," represents how quickly consumed carbohydrates are digested and enter the bloodstream. It assigns a score between 0 and 100 to all foods, with glucose/dextrose having a base index of 100. The higher the dextrose equivalent, the faster the product's sugar is assimilated. The lower the dextrose equivalent, the more gradually the product will be assimilated.
Our products have dextrose equivalents between 12 and 20, making them easily assimilated by the body.
To learn more, feel free to read our article on the glycemic index.

An isotonic drink has the same concentration as blood or blood plasma. This means that its absorption will be optimal in the intestines. It will quickly leave the stomach for optimal effectiveness and definite digestive comfort. We can also speak of the drink's osmolarity or osmotic concentration.
An isotonic drink contains roughly the same amount of carbohydrates, water, and salt as blood.

Dilute 200 g of Carbo Powder in 1 to 1.5 litres of water on each reload day.

Carbohydrate loading takes place over 3 days, at D-4, D-3 and D-2. No carbohydrate loading the day before the race. Consume 1 to 1.5 litres of water with the carbohydrate loading dose per day. Consume regularly in small quantities (15 cl max) spread throughout the day.

We do recommend carbohydrate loading on D-4, D-3 and D-2 and stopping the day before the race so as not to overload the body before the race.

If stored in its original packaging, away from heat and humidity, and with the box properly closed after each use, Authentic Carbo Powder can be used until the date indicated on the box, even after opening.

- For a pre-workout snack: dilute 60g (5 heaped tablespoons) of powder in a bowl and add 20 ml of water.
- For breakfast: dilute 120g (10 heaped tablespoons) of powder in a bowl and add 40 ml of water.

It is recommended to consume the energy cream 15 to 30 minutes before starting your physical activity.

Dilute 40 g of powder in 500 ml of water - that's 2 scoops or 3 heaped tablespoons. In hot weather, dilute further.

It is advisable to drink 150 to 200 ml of sports drink every 15 minutes.
Don't wait until you're thirsty to hydrate!

We recommend preparing your sports drink at the last minute. However, you can prepare it 12 hours in advance and store it in the refrigerator (T°<10°C) until use.

If stored in its original packaging, away from heat and humidity, and with the box properly closed after each use, Authentic Booster + can be used until the date indicated on the box, even after opening.

It is advisable to take 25 to 30 g per serving, at a rate of one serving every 45 minutes.

Authentic Energy Gel Fluide can be stored for at least 3 months, away from light and in a cool place (preferably in the refrigerator).
The gel may potentially lose some vitamin C, as this vitamin is very sensitive to light and heat, but all other macro and micronutrients will not change within 3 months after opening.

Dilute 60 g of Authentic Récup powder (8 doses) in 250 ml of cold water. You can also dilute 30 g in yogurt or quark.

It is recommended to drink 250 ml of recovery drink immediately after exercise (between 0 and 30 minutes after).

The recovery drink, Authentic Récup, can be prepared a few hours in advance BUT must be kept chilled before consumption to avoid altering its properties.

If kept in its original packaging, away from heat and humidity, and with the box properly closed after each use, Authentic Récup can be used until the date indicated on the box, even after opening.

Recovery Bars are sold in packs of 2 x 40g servings. Depending on the duration and intensity of your effort, consume one to two servings.
1 serving of 40g = 9g of protein (including 20% collagen) = 1 egg or ½ steak or ½ salmon fillet.

For optimal recovery, it is advisable to consume recovery products (drink, bar, or chips) within 30 minutes after your workout or race.

We offer home delivery and relay point delivery (Colissimo or DPD).

If you live in the Grenoble area, you can:
- opt for "click & collect" and pick up your order from our shop located at 85 rue Louis Barran in St Jean de Moirans (38430).
- buy our products directly from our Authentic Nutrition factory outlet: 85 rue Louis Barran 38430 St Jean de Moirans.
Shop and order collection opening hours: Monday to Friday from 1 pm to 5:30 pm.
The shop is easily accessible via the A48 motorway.

Standard delivery is free for purchases over €40 in metropolitan France and the European Union.

Here are the shipping costs for deliveries in metropolitan France (by purchase amount):

Consult

We prepare your order within 24 to 48 hours*. Delivery to your home or chosen relay point then takes between 48 and 72 hours*.
* excluding weekends, public holidays, and exceptional company closures

As soon as your order leaves our warehouses, you will be notified by email and will receive a message from the carrier, Colissimo or DPD, with the package tracking number.

Our mission is to be close to our customers, with several ways to contact us:

• via the online form: this is the preferred solution for better tracking of your requests. The form can be found here
• via the chatbot on the website: in addition to pre-configured answers, we are real people behind it, so if we are online, we will be happy to answer you from 10 am to 12 pm then 2 pm to 5 pm.
• by email: contact[at]gtech-grenoble.com
• by phone: +33 (0)4 38 02 02 32. Our super sales administration will be happy to answer you from 10 am to 12 pm then 2 pm to 4 pm.

We have a factory outlet at our head office (85 rue Louis Barran 38430 Saint Jean Moirans). It is open Monday to Friday from 10 am to 5:30 pm. You will find advice and, of course, our entire range of Authentic Nutrition products.