Cited by 85Biochemical effects in animalsMuscle metabolism and nutritionAnimal Nutrition and Physiology

Optimizing human in vivo dosing and delivery of β-alanine supplements for muscle carnosine synthesis

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Stellingwerff, Trent, Decombaz, Jacques, Harris, Roger C., Boesch, Chris·2012·Amino Acids

Abstract

Interest into the effects of carnosine on cellular metabolism is rapidly expanding. The first study to demonstrate in humans that chronic β-alanine (BA) supplementation (~3-6 g BA/day for ~4 weeks) can result in significantly augmented muscle carnosine concentrations (>50%) was only recently published. BA supplementation is potentially poised for application beyond the niche exercise and performance-enhancement field and into other more clinical populations. When examining all BA supplementation studies that directly measure muscle carnosine (n=8), there is a significant linear correlation between total grams of BA consumed (of daily intake ranges of 1.6-6.4 g BA/day) versus both the relative and absolute increases in muscle carnosine. Supporting this, a recent dose-response study demonstrated a large linear dependency (R2=0.921) based on the total grams of BA consumed over 8 weeks. The pre-supplementation baseline carnosine or individual subjects' body weight (from 65 to 90 kg) does not appear to impact on subsequent carnosine synthesis from BA consumption. Once muscle carnosine is augmented, the washout is very slow (~2%/week). Recently, a slow-release BA tablet supplement has been developed showing a smaller peak plasma BA concentration and delayed time to peak, with no difference in the area under the curve compared to pure BA in solution. Further, this slow-release profile resulted in a reduced urinary BA loss and improved retention, while at the same time, eliciting minimal paraesthesia symptoms. However, our complete understanding of optimizing in vivo delivery and dosing of BA is still in its infancy. Thus, this review will clarify our current knowledge of BA supplementation to augment muscle carnosine as well as highlight future research questions on the regulatory points of control for muscle carnosine synthesis.

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  • Muscle concentrations of carnosine respond to supplementation with β-alanine, the rate-limiting precursor for carnosine synthesis.

    “More recently, muscle concentrations of the dipeptide carnosine have been shown to respond to supplementation with β-alanine, the rate-limiting precursor for carnosine synthesis.”
  • Supplementation with doses >800 mg of purified β-alanine is associated with symptoms of paresthesia, but this can be managed with slow-release tablets or spreading doses over the day.

    “Supplementation with doses > 800 mg of purified b-alanine is associated with symptoms of paresthesia (skin tingling), but this sometimes unpleasant side-effect can be managed with slow-release tablets or spreading doses over the day [136].”
  • Intakes of 3-6 g/d for 4-12 weeks increase intracellular carnosine buffer by 50-85%.

    “The optimal loading protocol is unknown but intakes of 3-6 g/d for 4-12 weeks increase this intracellular buffer by 50-85% [136].”

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Authors
Stellingwerff, T., Decombaz, J., Harris, R. C., & Boesch, C.
Affiliations
  • Nestlé (Switzerland) (CH)
  • University of Bern (CH)
Corresponding author
Stellingwerff, Trent
Venue
Amino Acids
Published
2012-02-23
Volume
43
Issue
1
Pages
57-65
ISSN
  • 0939-4451 (ISSN-L)
  • 1438-2199
OpenAlex
W1991434547
Cited by
85
References
51
Citations by year
2026: 1 · 2025: 1 · 2024: 4 · 2023: 2 · 2022: 3 · 2021: 3 · 2020: 2 · 2019: 5 · 2018: 11 · 2017: 10 · 2016: 8 · 2015: 5 · 2014: 10 · 2013: 13 · 2012: 6
FWCI
1.19
Type
journal article
Language
en
Open access
Locations
  • Amino Acids (publishedVersion)
  • PubMed (publishedVersion)
  • BORIS (University Library Bern) (submittedVersion, other-oa)
  • Open Access CRIS of the University of Bern
Topics
  • Health Sciences › Medicine › Physiology › Biochemical effects in animals
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
Keywords
beta-alanine supplementation, muscle carnosine, dose-response relationship, slow-release tablets, exercise performance
MeSH terms
Animals, Carnosine, Horses, Humans, beta-Alanine, Exercise, Muscle, Skeletal, Dietary Supplements

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