How much beta-alanine should be in a pre-workout?

The short answer

• Studies gave 3.2–6.4 g of beta-alanine a day, every day, for weeks. The ISSN position stand recommends 4–6 g a day.
• 90 of 105 pre-workouts on the site list beta-alanine. 76 give an amount; the middle one has 2.5 g a serving.
• 36 of 76 reach 3.2 g in one serving. The amounts you'll see most are 3.2 g (28 labels), 1.6 g (19 labels) and 2 g (13 labels).
• 14 list beta-alanine without an amount, mostly inside a proprietary blend. In 7 of those, the blend is too small to hold 3.2 g of it.
• Beta-alanine builds up in muscle with daily use. A pre-workout below 3.2 g still adds to that, just more slowly, and if you take it only on training days, your daily average is lower than the label.

Where 3.2 g comes from

Beta-alanine isn't taken for an effect on the day. The body uses it to make carnosine, which is stored in muscle, and the studies measured how far carnosine rose after weeks of daily doses. In an early study, 3.2 g and 6.4 g a day for four weeks raised muscle carnosine by an estimated 42% and 64% (Harris et al., 2006). A meta-analysis of the trials found daily doses from 2.4 to 6.4 g and no clear link between the daily dose and the effect (Hobson et al., 2012). The ISSN's position stand recommends 4 to 6 g a day for at least two to four weeks (Trexler et al., 2015).

3.2 g, the lower dose in that study, is also the amount the labels here print most often. We judge beta-alanine against the amount a day, not the amount a workout. A label below 3.2 g is marked Below research dose. That doesn't mean it does nothing: a lower daily amount still raises carnosine, it just takes longer to get there.

It counts by the day, not by the workout

The studies gave beta-alanine every day, training or not. A pre-workout's directions say to take it before training, so it's usually taken on training days only. Averaged over the week, you get less a day than the label amount. Take a 3.2 g serving on 4 training days a week, and you get 12.8 g a week, about 1.8 g a day.

The label tells you what one serving holds. How close you get to the daily amounts in the studies depends on how often you take it.

What the well-known tubs contain

These are the pre-workouts people most often search for by name, with the beta-alanine in one serving as their labels list it:

One brand can sit on both sides of the line: Cellucor's C4 Original and C4 Ultimate, or Bucked Up's standard formula and Mother Bucker, are different labels with different amounts. Check the exact product, not the brand. The highest amount on the site is 6.4 g, in Bucked Up Mother Bucker, which matches the top dose in the studies.

When beta-alanine is inside a blend

A proprietary blend prints one weight for several ingredients together. US rules make the label list a blend's ingredients from heaviest to lightest, so even without an amount, there is a ceiling: the second ingredient can't be more than half of the blend, the third no more than a third, and so on. That gives the most beta-alanine each of these blends can hold. The product page marks it Hidden in a blend and shows the range.

In 7 of these 13, even the ceiling is below 3.2 g. The others could reach it, but the label doesn't say whether they do. One more label, GAT Sport Nitraflex, lists beta-alanine with no amount and no blend weight at all.

The tingle

Beta-alanine is the pre-workout ingredient best known for a pins-and-needles feeling. The ISSN position stand says tingling (paraesthesia) is "commonly experienced" above 800 mg taken at once in a form that isn't sustained-release, that it's "the only reported side effect", and that "divided lower doses (1.6 g)" or a sustained-release form can reduce it (Trexler et al., 2015).

74 of the 76 labels here with an amount have more than 800 mg in a scoop, so the tingle tells you little about whether a tub reaches 3.2 g. 6 labels print their amount for a two-scoop serving, so one scoop holds half: Apollon Nutrition Assassin, Apollon Nutrition Bare Knuckle, Legion Pulse, Legion Pulse Stim-Free, Naked Nutrition Naked Energy and Thorne Advanced Pre-Workout.

Is there a "too much"?

The studies we use go up to 6.4 g a day. We haven't set an upper limit for beta-alanine, so no product on the site is marked "too much" for it, and we don't guess one. None of the 76 labels with an amount gives more than 6.4 g in a serving.

Reading your own tub

1. Find beta-alanine on the facts panel. It may be printed as CarnoSyn, a trademarked beta-alanine; we count it gram for gram.
2. Check the amount is for the serving you take, and how many scoops make that serving.
3. If it's inside a blend with no amount, look at the blend's weight and its place in the list: that's the most it can hold.
4. Work out your day, not your workout: the serving times the days a week you take it, divided by seven.
5. Compare that with the 3.2–6.4 g a day the studies used.

Or search for your product on the pre-workouts page, or paste its label, and we'll do the counting, with every step shown. The beta-alanine guide has the full research dose and sources.

Sources

• Harris RC, Tallon MJ, Dunnett M, et al. The absorption of orally supplied beta-alanine and its effect on muscle carnosine synthesis in human vastus lateralis. Amino Acids. 2006;30(3):279-289. doi:10.1007/s00726-006-0299-9
• Hobson RM, Saunders B, Ball G, Harris RC, Sale C. Effects of β-alanine supplementation on exercise performance: a meta-analysis. Amino Acids. 2012;43(1):25-37. doi:10.1007/s00726-011-1200-z
• Trexler ET, Smith-Ryan AE, Stout JR, et al. International society of sports nutrition position stand: Beta-Alanine. J Int Soc Sports Nutr. 2015;12:30. doi:10.1186/s12970-015-0090-y
• Label amounts: each product's label as imported, with its source and date on the product page. Blend ceilings follow 21 CFR 101.36, which lists blend ingredients by weight.
• How we count every ingredient: our methodology.