Carnosine applied to skin has been tested four times in the published literature. Here they are with their designs, their subjects, and the column nobody else prints: who the authors work for.
Short answer
Four trials of topical carnosine have been published. Two are manufacturer-linked and positive, one is independent and null, and the newest is independent, triple-blind and positive. The strongest design — a menthol-matched placebo, so the menthol tingle cannot explain the result — is also the most recent, and it found gains of 7.6%, 8.3% and 12.3% in the three sprints that reached significance, and none in average power. That is a narrow, real, and small effect in trained athletes doing repeated sprints. It is not evidence for anything else.
The four trials, side by side
Reported a benefitFound no effectHollow means the trial measured nothing. Green means the authors are independent of the manufacturer; grey means they are not.
2025Topical carnosine gel improves intermittent high-intensity exercise performance in world-class rugby sevens players
PositiveIndependent
Authors
Beaven CM, James C, McMaster DT, Brockelbank N
Journal
Journal of the International Society of Sports Nutrition
Subjects
World-class rugby sevens players (1,452 international caps) (n = 7)
Design
Triple-blind, placebo-controlled, counterbalanced crossover. Placebo matched for menthol (1.25%) and odour.
Found
Peak power higher on the gel in sprints 2, 4 and 7 — the only three of twelve to reach p < 0.05 — by +7.6% (d = 0.99), +8.3% (d = 0.74) and +12.3% (d = 0.98). Across all twelve sprints the difference ran from +4.1% to +12.3%. No effect on mean power, heart rate or perceived exertion.
Independence
University of Waikato, Hong Kong Baptist University and New Zealand Rugby. Product bought, not supplied by an author.
2016Evaluation of the efficacy of LactiGo™ topical gel as an ergogenic aid
PositiveManufacturer-linked
Authors
Sharpe TM, Macias C
Journal
Journal of Exercise Physiology Online
Subjects
International-level soccer players · subject count not yet read from the primary source
Design
Compared against a placebo gel over three all-out 1000 m time trials.
Found
Average time over three all-out 1000 m trials about 4% faster on the gel (gel 239.7 ± 12.6 s vs placebo 248.8 ± 9.6 s). Arm labels inferred from the direction of the reported improvement; confirm against the primary source.
Independence
Names the product in the title, published in a non-indexed online journal. This is the "4% improvement" the brand advertises — treat it as the weakest entry here, not the strongest.
The 2025 trial is the one to read, and this is all of it. Three of the four things it measured did not change. Publishing only the fourth is how a narrow result becomes a slogan.
Seven world-class rugby sevens players, against a placebo matched for menthol. The peak power bar spans the three sprints that reached significance — +7.6% (d = 0.99), +8.3% (d = 0.74) and +12.3% (d = 0.98). Across all twelve the difference ran from +4.1% to +12.3%. The other three measures are on the chart too, sitting on zero, because showing everything a trial measured is what makes the one that moved believable. Beaven et al. 2025, JISSN.
The precise figures, because everyone else rounds them. Peak power was higher on the carnosine arm in every sprint but the last, and reached statistical significance in three: sprint 2 (1433 W vs 1332 W, +7.6%, d = 0.99), sprint 4 (1347 W vs 1244 W, +8.3%, d = 0.74) and sprint 7 (1426 W vs 1270 W, +12.3%, d = 0.98). Across all twelve the difference ran from +4.1% to +12.3%. The manufacturer advertises 4%, from a different and weaker paper.
What is still unknown
What the trials have not answered yet
No trial has measured intramuscular carnosine in humans after topical application, so the mechanism is inferred, not shown. The only direct absorption evidence is from horses, in a paper sharing authors with the manufacturer-linked 2016 study. Sample sizes are small — the strongest trial had seven subjects. Nothing has been tested in recreational athletes, over repeated use, or for soreness and recovery, despite that being how the product is usually marketed. If you want the plain- English version of what topical carnosine even is, start at the overview; if you have read enough, where to buy it.
Outside the lab
What people who use it report
Seven world-class players on a Wattbike is not a recreational athlete on a Tuesday. These are the ones who let us write down what they did.
Very clear power and power endurance differences between same workout last week (no gel) to this week (gel). Did 30min of power/explosive lifts, followed by 10min of acrobatics, then 20min of 4:1 easy:hard running. Typical Sunday morning for me before delivering sessions. Early-session force/power capacity up, repeated explosive work tolerance up, perceived recovery between strength bouts up, available strength-work reserve up, subsequent cardiovascular capability remained excellent — locomotor muscular fatigue eventually still appeared.
Skye E.Coach · Strength & power
Protocol
Same session repeated a week apart, gel on the second week only
Measured
~17–27% higher peak strength loading and 16.7% more fast running, for 1.1% more WHOOP strain
Pushed myself super hard on Friday with Elite Feet, basketball scrimmages, barefoot jumping on concrete to dunk on 9 foot rims, plyos with several of my clients, and finally 10D5 seated calf raises DEEP. My soleus was absolutely cooked. It was super sore and felt like it was 5% away from an injury. I used Lactigo every two hours throughout the weekend, and by Monday morning I was completely fine. I put it on my quads all weekend too. Today I front squatted 215 lbs several times with lifetime PR level form. It could be timing, years of training, or the fact that I’ve learned a ton of new training techniques this year.
Joe E.Coach · Basketball & strength
Protocol
Every two hours across a weekend, soleus and quads
Measured
Front squatted 215 lbs at lifetime-PR form at 32; self-rated DOMS down roughly 50% per application
Got it after a solid session with legs and put it on lightly that night. Woke up with no doms at all. Been applying a little bit before and after training to targeted areas and having the same results. Surfing every morning and usually I’d be pretty cooked especially after an upper body session and just feeling like I could keep going. Also noticed an improvement in my sleep since applying it at night. Especially on the back of my neck.
Mitch D.Recreational lifter · Surfing & gym
Protocol
Light application before and after training, and at night
Measured
No next-day soreness after a heavy leg session
I really put the gel to the test this weekend playing a basketball tournament. 6 games in 4 days. The muscle and joint recovery was insane but what I noticed even more was the recovery on my CNS and not feeling CNS fatigue. I was waking up each morning bouncing out of bed for games. Normally my feet, ankles and calves are pretty cooked when I play 2 games in 3 days.
BrendonCoach, The Vitality Method · Basketball
Protocol
Across a four-day tournament, six games
Measured
Six games in four days without the usual lower-leg wreckage from two games in three
1 week in using the gel and I am waking up with a little less pain in my right shoulder everyday. Workouts I def have that extra gear and seem to be recovering faster between rounds at BJJ. I keep thinking its too good to be true but from all the testimonials here and my personal experience it is working.
Eamon F.Grappler · Brazilian jiu-jitsu
Protocol
Daily for a week, shoulder and training days
Measured
Faster recovery between rolling rounds
I landed with too much dorsiflexion from a backflip that cooked my ankle immediately. Added lactigo later and barely had any pain or soreness the next day. It’s still recovering but went from like an 8/10 discomfort to 2/10.
Jorge Q.Athlete · Tumbling
Protocol
Applied the same day, after the landing
Measured
Self-rated discomfort 8/10 to 2/10 next day
Everyone here chose to test it and chose to write in, so weigh these as testimonials rather than as data. What makes them worth publishing is the protocol and the measured number attached to each one. The controlled trials — all four of them — are on the evidence page.
