What sets this citrulline malate powder apart from the crowd
NanoPure® is the premium line from GN Laboratories. The philosophy behind it: only the ingredient, nothing else. What's on the label is what's inside, and nothing more.
L-citrulline malate in a 2:1 ratio means: for every two parts of the amino acid, there is one part malic acid. This ratio is well established in sports nutrition and is used in numerous studies. ¹⁾²⁾ At a serving of 6 g, the powder therefore delivers around 4 g of pure amino acid and 2 g of malic acid.
Many of these products on the market contain anti-caking agents such as silicon dioxide or magnesium stearate. NanoPure® deliberately does without them.
The result: a powder that consists exclusively of L-citrulline malate.
NanoPure® Citrulline Malate vs. market average
| Feature | NanoPure® (GN Laboratories) | Market average |
| L-citrulline:malate ratio | 2:1 | 2:1 (sometimes not adhered to) |
| Additives | None | Often anti-caking agents (E551) |
| Vegan | Yes | Mostly yes |
| Made in Germany | Yes (GMP & IFS) | Partially |
| Package size | 500 g | 250-500 g |
| Flavor | Neutral | Neutral or flavored |
| Value for money | Strong | Varies |
Citrulline malate as a supplement, briefly explained
L-citrulline is a non-essential amino acid that was first discovered in watermelons, hence the name (Latin: Citrullus = watermelon). In the body it is converted into L-arginine. L-arginine, in turn, is involved in nitric oxide metabolism, which among other things plays a role in blood flow and oxygen supply to the muscles.
Malic acid is a natural component of the citric acid cycle and is found in apples, among other sources. The combination of both substances, L-citrulline malate powder, is one of the most popular components of modern pre-workout formulas.
Its use as a standalone supplement is particularly common in bodybuilding and strength training. Athletes who value their training performance and capacity appreciate the amino acid as a targeted addition before intense training sessions.
What is the difference between L-citrulline and L-citrulline malate?
Pure L-citrulline consists exclusively of the amino acid. The malate variant combines the amino acid with malic acid, typically in a 2:1 ratio. Both forms are examined in studies. ³⁾ The choice depends on personal preferences. The latter is the more commonly used form in supplements.
A tub with 500 g of pure powder
At an intake of 6 g per day, one tub of NanoPure® Citrulline Malate lasts for over 80 servings. That's almost three months with daily use. Those who prefer higher amounts will get correspondingly fewer servings.
- At 6 g per day: approx. 83 servings (~2.5 months)
- At 8 g per day: approx. 62 servings (~2 months)
- Flexible dosing: amount can be adjusted individually
The flavor-neutral powder dissolves easily in water and can be combined with other supplements without any problems, for example with L-arginine, EAAs or a pre-workout booster. This is a real advantage for athletes who put together their own supplementation around strength training.
Who is this product suitable for?
- Strength athletes and bodybuilders: Citrulline malate is popular as a pump supplement in strength training. Anyone looking to specifically complement their training and muscle building will find a pure single ingredient here without unnecessary extras.
- Endurance athletes: Runners, cyclists and CrossFit athletes also rely on the supplement as part of their supplement routine. Especially before long training sessions, it is a valued addition for endurance.
- Athletes on a diet: During a calorie-restricted phase, many athletes turn to single supplements instead of calorie-rich combination products. The powder contains no calories from sweeteners or flavorings.
- Purists and DIY mixers: Those who put together their own supplements and value purity get exactly that here: one ingredient, no extras. Combining it with other amino acids or strength supplements is possible at any time.
Production and quality
GN Laboratories produces the entire NanoPure® line in Germany. Manufacturing follows GMP (Good Manufacturing Practice) and IFS Food standards. That means:
- GMP-certified - standardized manufacturing processes
- IFS Food - independently audited quality management system
- Lab-tested raw materials - tested for purity and content
- Transparent declaration - complete listing of all ingredients