Beta-Alanine and Pre-Workout
Beta-alanine works for efforts lasting one to four minutes, which is almost nothing a lifter does. The tingling is real and is not the supplement working.
Last updated: 30 September 2026
Overview
A tub of pre-workout contains between eight and twenty-five ingredients. Two or three of them have real evidence, one of them is doing nearly all of the work you feel, and one causes the tingling that most people mistake for the product working.
This article goes through them. Supplements that work is the overview; this is the pre-workout shelf in detail.
Quick Answer
Beta-alanine improves performance at 4 to 6g daily for at least two to four weeks, with effects most pronounced in efforts lasting one to four minutes. Citrulline malate at 6 to 8g increased repetitions by about three in a meta-analysis, with no significant effect for upper body exercises.
Key Points
- Beta-alanine needs weeks of daily loading. It does nothing acutely.
- Its benefit is clearest in 1 to 4 minute efforts, not in sets of eight.
- The tingling is paraesthesia, harmless, and not the effect.
- Citrulline malate adds about 3 reps. Lower body only, marginally.
- Caffeine is doing most of what you feel in a pre-workout.
Beta-alanine
The ISSN position stand is specific, and worth reading closely because the specificity is where the disappointment lives.
| Dose | 4 to 6g daily |
| Time to work | At least 2 to 4 weeks of daily use |
| Mechanism | Raises muscle carnosine, an intracellular pH buffer |
| Clearest benefit | Open end-point tasks and time trials lasting 1 to 4 minutes |
| Also | Attenuates neuromuscular fatigue, particularly in older subjects |
| Safety | Appears safe in healthy populations at recommended doses |
| Side effect | Paraesthesia — tingling. The only one reported |
| Reducing the tingling | Divided lower doses of 1.6g, or a sustained-release formula |
The position stand also says more research is needed on its effects on strength, and on endurance beyond 25 minutes.
Read that "1 to 4 minutes" line again, because it decides whether this supplement is for you. A set of eight squats takes perhaps 30 seconds. A 400m run, a 2km row, a hard set of 25 or a CrossFit workout takes one to four minutes. If your training does not contain efforts in that window, beta-alanine has little to offer you, and if it does — rowers, 800m runners, high-rep training — it is one of the better-supported supplements available.
The tingling
Paraesthesia: a pins-and-needles feeling, usually in the face, neck and hands, starting 10 to 20 minutes after a dose.
It is harmless, it is the only reported side effect, and it can be reduced by splitting the dose into 1.6g portions or using a sustained-release formula.
It is also not the supplement working. Beta-alanine works by raising muscle carnosine over weeks; the tingle is an acute nerve effect with no relationship to the benefit. Pre-workout manufacturers know this, which is why beta-alanine appears in products at doses far too low to raise carnosine but quite high enough to tingle. The sensation is marketing.
Citrulline malate
Marketed for "pumps" and blood flow. The measured effect is on repetitions, and it is small.
A meta-analysis of eight double-blind placebo-controlled studies, 137 participants, mostly strength-trained:
| Dose studied | 6 to 8g, 40 to 60 minutes before training |
| Effect | +3 ± 5 repetitions, 6.4 ± 7.9% more than placebo (p=0.022) |
| Effect size | Small (0.196) |
| Lower body | A tendency toward benefit (8.1%, p=0.051) |
| Upper body | No significant effect (5.7%, p=0.131) |
Three extra reps across a whole session, concentrated in lower body work, with a confidence interval wide enough that some people got nothing. That is a real effect and it is a modest one, and the honest summary is: worth trying if you are already doing everything else, not worth prioritising.
Note the dose too. Most pre-workout blends contain one to three grams, which is well below what was studied.
What is actually in the tub
| Ingredient | Verdict |
|---|---|
| Caffeine | The one doing most of what you feel. See caffeine |
| Beta-alanine | Real, but only for 1 to 4 minute efforts, and only at 4 to 6g daily |
| Citrulline malate | Small effect at 6 to 8g. Usually underdosed |
| Creatine | Excellent, and irrelevant to timing. See creatine |
| Sodium bicarbonate | Real for high-intensity efforts. Rarely in blends, and rough on the gut |
| Betaine | Weak, mixed evidence |
| Tyrosine | Mechanism yes, outcomes no |
| Taurine | Very weak |
| BCAAs | Nothing, if your protein intake is adequate |
| Arginine | Poorly absorbed. Citrulline exists because of this |
| "Proprietary blend" | Doses hidden, almost always because they are low |
| Nitric oxide boosters | Usually arginine, usually pointless |
The underdosing problem
The core issue with pre-workout as a category is not that the ingredients are fake. It is arithmetic.
To deliver effective doses of beta-alanine, citrulline and creatine, a serving would need around 5g + 7g + 5g of those three alone, which is about 17g before flavouring. Products that fit in a 10g scoop with twenty ingredients on the label are not delivering effective doses of any of them.
"Proprietary blend" exists to make this uncheckable. If the label does not give a milligram figure per ingredient, assume the answer is "not enough".
What to buy instead
If you want the effects, buy the ingredients:
| Want | Buy | Dose |
|---|---|---|
| The energy and focus | Caffeine | 3 to 6mg per kg, 60 min before |
| Strength and size | Creatine monohydrate | 5g daily, any time |
| 1 to 4 minute efforts | Beta-alanine | 4 to 6g daily, split to reduce tingling |
| A few more reps | Citrulline malate | 6 to 8g, 40 to 60 min before |
Bought separately these cost a fraction of a branded tub, and you know what is in them.
Common Mistakes
| Mistake | Why it causes problems | Better approach |
|---|---|---|
| Taking beta-alanine before a session | It works over weeks, not acutely | Daily, consistently |
| Judging it by the tingle | Paraesthesia is unrelated to the benefit | Judge by performance |
| Buying beta-alanine for sets of 8 | The evidence is for 1 to 4 minute efforts | Skip it, or use it for high-rep work |
| Trusting a proprietary blend | Doses hidden because they are low | Buy single ingredients |
| Expecting pre-workout to build muscle | Training and food build muscle | Fix those first |
| Relying on it to train at all | Becomes a requirement, not a tool | Train without it sometimes |
Frequently Asked Questions
Does beta-alanine work?
Yes, within a narrow window. The ISSN position stand finds 4 to 6g daily for two to four weeks improves performance, most clearly in efforts lasting one to four minutes.
Why does pre-workout make me tingle?
Beta-alanine causes paraesthesia. It is harmless, unrelated to the benefit, and can be reduced with divided 1.6g doses or a sustained-release form.
Is citrulline malate worth taking?
Marginally. A meta-analysis found about three extra repetitions at 6 to 8g, with a tendency toward benefit in the lower body and no significant effect in the upper body.
Do I need a pre-workout supplement?
No. Caffeine and creatine bought separately cover almost everything a blend does, at effective doses and a lower price.
Is pre-workout bad for you?
The main risks are a high caffeine dose and not knowing what you are taking. See the safety limits in caffeine and performance.
Sources
Trexler et al. (2015), International Society of Sports Nutrition position stand: beta-alanine - https://pmc.ncbi.nlm.nih.gov/articles/PMC4501114/
Vårvik, Bjørnsen & Gonzalez (2021), acute effect of citrulline malate on repetition performance during strength training: systematic review and meta-analysis - https://pubmed.ncbi.nlm.nih.gov/34010809/
Guest et al. (2021), ISSN position stand: caffeine and exercise performance - https://pmc.ncbi.nlm.nih.gov/articles/PMC7777221/