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Study summary · Metabolic health, glucose & body composition

Does carnosine supplementation affect lipid profile, fasting blood glucose, HbA1C, and insulin resistance?

In one paragraph

Carnosine, a meta-analysis (Complement Ther Med 2019, PMID 31987255) — carnosine intervention significantly reduced HbA1C levels (WMD: -0.92 %, 95 % CI: -1.20, -0.63, I:69 %). However, combined results from four studies with 183 participants showed no significant reduction in triglycerides (WMD: -14.46 mg/dl, 95 % CI: -29.11, 0.19, I:94 %).

Source: Complement Ther Med 2019, PMID 31987255 ↗ · Research map · How Magellan grades evidence · evidence confidence: high

Complement Ther Med · 2019 · PMID 31987255 · DOI 10.1016/j.ctim.2019.102241

Plain-English summary written and published by Magellan Longevity · medical review by Gabriel Radu, DO (physiatrist, NPI 1376861765). We summarize what the paper reported — we did not run this study.

The takeaway

Carnosine supplementation may help lower HbA1C levels, but it does not appear to impact other markers of glucose metabolism or lipid profile.

The question

Does carnosine supplementation affect lipid profile, fasting blood glucose, HbA1C, and insulin resistance?

What they tested

Carnosine supplementation may improve glucose disorders and dyslipidemia.

How they did it

A meta-analysis of randomized controlled trials (RCTs) was conducted by searching MEDLINE/PubMed, Scopus, and Web of Science up to June 2019. The search used Medical Subject Heading and keywords. Combined effect sizes were calculated as weighted mean difference (WMD) using a random-effects model, and heterogeneity was assessed with Cochran's Q test and I .

What they found

Four RCTs, involving 184 participants, were analyzed. Carnosine intervention significantly reduced HbA1C levels (WMD: -0.92 %, 95 % CI: -1.20, -0.63, I:69 %). However, combined results from four studies with 183 participants showed no significant reduction in triglycerides (WMD: -14.46 mg/dl, 95 % CI: -29.11, 0.19, I:94 %). No significant changes were observed for HOMA-IR, Cholesterol, fasting blood sugar, or HDL-C.

What it means

Carnosine supplementation decreases HbA1C but does not significantly affect HOMA-IR, Cholesterol, fasting blood sugar, triglycerides, or HDL-C.

Limitations

The study notes that future research with larger sample sizes, varied carnosine doses, and population-specific subgroups is needed to confirm and strengthen these findings.

“carnosine intervention reduced HbA1C levels in intervention vs control groups”— from the published abstract, Complement Ther Med 2019

The paper at a glance

TitleEffect of carnosine on lipid profile, fasting blood glucose, HbA1C and insulin resistance: a meta-analysis of randomized controlled trials
JournalComplement Ther Med
Year2019
PMID31987255 ↗
DOI10.1016/j.ctim.2019.102241 ↗
TopicMetabolic health, glucose & body composition

Read the source: PubMed record (authors, abstract, full citation) ↗ · Publisher via doi.org ↗

Where Magellan uses this paper

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Carnosine

Meta-analyses of randomized trials indicate that carnosine or beta-alanine supplementation modestly improves glycemic control, lowering fasting glucose and HbA1c, in people with prediabetes or type 2 diabetes, and pooled trials of histidine-containing dipeptides also report reduced waist circumference and a small…

Carnosine

Carnosine (beta-alanyl-L-histidine) is a naturally occurring dipeptide, composed of the amino acids…

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Research describes the compound or intervention studied. It is not a claim about any specific product.

Molecules & mechanisms in this paper

Each of these is named in the paper’s own words above. Open the monograph for the full mechanism and its other citations.

Blood glucose

Cite this page

These citations point at this summary. To cite the original paper with its full author list, use the PubMed record or doi.org.

APA
Magellan Longevity. (2026). Does carnosine supplementation affect lipid profile, fasting blood glucose, HbA1C, and insulin resistance? [Plain-English summary of Complement Ther Med 2019, PMID 31987255, DOI 10.1016/j.ctim.2019.102241]. Magellan Longevity. https://magellanlongevity.com/study/d31987255.html
BibTeX
@misc{magellan_d31987255, title = {Does carnosine supplementation affect lipid profile, fasting blood glucose, HbA1C, and insulin resistance?}, author = {{Magellan Longevity}}, year = {2026}, howpublished = {\url{https://magellanlongevity.com/study/d31987255.html}}, note = {Plain-English summary of PubMed PMID 31987255; DOI 10.1016/j.ctim.2019.102241; Complement Ther Med 2019. Reviewed by Gabriel Radu, DO}, urldate = {2026-08-11} }
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How this summary was made. Every section above restates what the published abstract of PMID 31987255 reports — the question, the design, the numbers, the authors’ own conclusion and their stated limitations. We do not add claims the paper did not make, and we keep negative and no-effect findings in. Magellan’s evidence grades are set from research like this and never from affiliate commissions.

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Educational information, not medical advice. This is a plain-English summary of published research; it is not a treatment recommendation and nothing here is intended to diagnose, treat, cure, or prevent any disease. Individual studies can be wrong, and a single paper rarely settles a question. Talk to your physician before acting on any research, especially if you are pregnant, nursing, or taking medication.