NSTK · 01.2026Independent supplement reference
NutriStack
Edition 1.0Updated August 1, 2026

Supplement × Supplement·Evidence index

Beta-Alanine and L-Citrulline: what the published research says

PubMed indexes 5 records that name Beta-Alanine and L-Citrulline together, either in the title or in an interaction, co-administration, or pharmacokinetic context. Each one is listed below with its study design and, where the abstract states one, the authors’ own conclusion, quoted and linked. This page reports that literature. It does not tell you whether to combine them.

Read this first

An evidence index, not guidance.

Every statement below is attributed to a named, dated, linked source.

This page lists published research relevant to Beta-Alanine and L-Citrulline. It deliberately does not state whether the combination is safe, whether it interacts, in which direction, at what dose, or how far apart to take them.

The research

5 studies naming Beta-Alanine and L-Citrulline.

Strongest relevance first: papers naming both substances in the title, then human trials and systematic reviews.

Effects of Combined Versus Single Supplementation of Creatine, Beta-Alanine, and L-Citrulline During Short Sprint Interval Training on Basketball Players' Performance: A Double-Blind Randomized Placebo-Controlled Trial.

International journal of sports physiology and performance · 2025 · PMID 40010353

Randomized Controlled Trial

“Our findings indicate that short-term supplementation with Cr, BA, and L-Cit, as well as a combination of them during SSIT, can significantly improve the physical and physiological performance of basketball players compared to a PL.”

Li et al. · Authors' conclusion

Names both Beta-Alanine and L-Citrulline in its title.

Modified methods for measuring citrulline and carbamoyl-beta-alanine with reduced light sensitivity and sucrose interference.

Analytical biochemistry · 1987 · PMID 3118740

“The reduction in acid concentration results in the stability of the colored complex for at least 50 min under the laboratory lighting conditions and allows for the presence of 5 mumol sucrose and 0.03 mumol mercaptoethanol in the assay. A low-acid modification for quantitating carbamoyl-beta-alanine is described also and may be applicable to the assay of dihydropyrimidinase.”

Zarabian et al. · From the abstract

Names both Beta-Alanine and L-Citrulline in its title.

Limitations

What this evidence cannot tell you.

Search-based evidence indexes have real limits, and it is worth being explicit about them:

NutriStack

Track what you actually take.

NutriStack is a free iPhone app for organising a supplement routine: what you take, when, and what the published record says about it. Its exploratory interaction checker covers Beta-Alanine, L-Citrulline, and several hundred other substances.

The checker is a research and organisation tool, not a clinical decision aid, and its per-pair assessments are excluded from search until they pass claim-level review.

NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.