L-Citrulline Malate
An amino acid bound to malic acid — weighed into the blend, not dusted on for the label
All articles checked for accuracy against the GB NHC Register and all sources have citations with verified links to their relevant studies.
A common sports supplement, citrulline malate pairs an amino acid with malic acid. Researchers have tested it a lot, but the evidence is mixed and product quality varies.
This article explains what citrulline malate is, why manufacturers use citrulline rather than arginine, what malate contributes, what the research literature actually says (and its limits), how WellsparQ formulates it, and basic safety and suitability notes. It aims to give clear context without making health claims.
Ingredient Snapshot
- What it is
- A compound combining the amino acid L‑citrulline with malic acid.
- Where from
- L‑citrulline (fermentation) paired with malic acid (industrial/malic sources).
- Known for
- Used in sports nutrition for its link to the arginine–nitric‑oxide pathway and energy‑cycle interest.
- In WellsparQ
- TriAmino Blend11.8 g
- ActiveNO Blend750 mg
Citrulline malate is two things joined together: L-citrulline, a non-protein amino acid first isolated from watermelon (Citrullus, which gives it its name), and malic acid, the tart organic acid found in apples and a working intermediate of the body's energy cycle. Supplement makers pair them because both are of interest to the exercise-science world — citrulline for its link to the nitric-oxide pathway, malate for its role in cellular energy metabolism. In the WellsparQ range it is a substantial, honestly weighed part of two blends.
Why citrulline, and not just arginine?
Citrulline is closely tied to L-arginine, the body's raw material for nitric oxide. When you swallow citrulline, the kidneys convert a good share of it back into arginine. Curiously, oral citrulline tends to raise blood arginine levels more reliably than taking arginine itself, because citrulline largely escapes the first-pass breakdown in the gut and liver that limits arginine ¹. That quirk of physiology is why researchers began testing citrulline in its own right.
The malate half
Malate (from malic acid) is a component of the citric-acid cycle, the pathway cells use to release energy from fuel. The theory behind pairing it with citrulline is that malate may support this energy cycle while citrulline feeds the arginine–nitric-oxide route — a two-pronged rationale. Reviewers note, however, that the malate contribution is less studied than the citrulline half, and that the ratio of citrulline to malate varies between products and is not always accurately labelled ¹.
What the research shows — and its limits
Citrulline malate is one of the more heavily trialled sports-nutrition ingredients, but the findings are genuinely mixed, and the best reviews say so.
| Review | What it examined | Conclusion (as reported) |
|---|---|---|
| Gough et al. 2021, Eur J Appl Physiol ¹ | Critical review of citrulline malate and exercise performance | Results "equivocal"; efficacy remains "ambiguous"; flags dosing and product-quality inconsistencies |
| Trexler et al. 2020, J Strength Cond Res ² | Citrulline supplementation in humans | Some studies positive, others null; more well-controlled work needed |
| Meta-analysis 2021, J Int Soc Sports Nutr ³ | Nitrate, arginine and citrulline for endurance | Signal strongest for nitrate; citrulline evidence weaker |
The common thread is that a single acute dose of around 8 g citrulline malate (or 3–4 g of L-citrulline) about an hour before exercise is the usual protocol, and that outcomes differ from study to study ¹². This is reported here as research context, not as a claim about what any WellsparQ product will do.
How WellsparQ uses it
| WellsparQ product | Declared citrulline malate | Factsheet note |
|---|---|---|
| TriAmino Blend | 11.8 g | 940 mg per serving alongside the BCAAs |
| ActiveNO Blend | 750 mg | A named component of a pre-activity blend |
Source: WellsparQ Supplements Database. The factsheet card puts the brand's stance neatly: the citrulline malate is "weighed into every serving alongside the BCAAs, not dusted on for the label" — a nod to the honesty standard, since some products in the wider market list a token amount for name-check value only.
Forms and suitability
The citrulline in these blends is made by fermentation of plant sugars, not extracted from watermelon at scale, and the malic acid is likewise produced industrially. The result is suitable for vegans and vegetarians. Citrulline malate is a mildly acidic, tart powder — the sourness comes from the malate portion.
Safety
Citrulline is well tolerated; gastrointestinal upset is the most commonly reported effect at higher doses, and generally less than with arginine. As with any active blend, anyone on blood-pressure or nitrate medication, pregnant or breastfeeding, or managing a health condition should check with a GP or pharmacist first, and stick to the stated serving.
References
- Gough LA, Sparks SA, McNaughton LR, et al. A critical review of citrulline malate supplementation and exercise performance. Eur J Appl Physiol 2021;121(12):3283–3295. PMID 34417881; PMC8571142. ↩ Back to text
- Trexler ET, et al. Effects of Citrulline Supplementation on Exercise Performance in Humans: A Review of the Current Literature. J Strength Cond Res 2020;34(5):1480–1495. PMID 31977835. ↩ Back to text
- Effect of food sources of nitrate, polyphenols, L-arginine and L-citrulline on endurance exercise performance: a systematic review and meta-analysis of randomised controlled trials. J Int Soc Sports Nutr 2021;18(1):76. PMID 34965876; PMC8715640. ↩ Back to text
- GB/EU Register of nutrition and health claims — amino-acid general-function claims on hold. ec.europa.eu food-feed-portal.