Vol. I · No. 33
Thursday, August 13, 2026
Issue: Summer · 2026
Established · MMXXVI
— The evidence base for longevity medicine —
Indexed by PubMed · CTG · Cochrane
Editorial team · geroevidence.com
Subscription · app.geroevidence.com

GLP-1 agonists and cardiovascular mortality: a deep dive into the outcome trial data

The SELECT, LEADER, and SUSTAIN-6 trials established GLP-1 agonists as cardiovascular medicines with mortality-reducing evidence. Here is what that evidence means for longevity medicine.

By Geroevidence editorial team·Published 19 July 2026·Category intervention profiles·13 min read
Strong
Evidence tier
GLP-1 receptor agonist
Drug class
Human RCTs
Evidence base
§ Overview

The SELECT, LEADER, and SUSTAIN-6 trials established GLP-1 agonists as cardiovascular medicines with mortality-reducing evidence. Here is what that evidence means for longevity medicine.

This profile synthesizes the published human evidence. The evidence tier system — Strong, Moderate, Emerging, Insufficient — is based on published peer-reviewed data only, with hard longevity outcomes weighted more heavily than surrogate endpoints. The full profile with all indexed papers and active trial alerts is available to subscribers.

§ Key human evidence
RCT
SELECT — New England Journal of Medicine, 2023
n=17,604
Non-diabetic adults with BMI ≥27 and established cardiovascular disease. Semaglutide 2.4mg weekly versus placebo. Primary MACE endpoint: HR 0.80 (95% CI 0.72–0.90). 20% relative reduction in cardiovascular death MI or stroke. No significant increase in serious adverse events. This is the first GLP-1 outcome trial in non-diabetic patients — the population most relevant to longevity medicine off-label use.
RCT
LEADER — New England Journal of Medicine, 2016
n=9,340
Type 2 diabetes patients with high cardiovascular risk. Liraglutide 1.8mg daily versus placebo. HR 0.87 (95% CI 0.78–0.97) for primary MACE endpoint. All-cause mortality HR 0.85 (p=0.02). CV death HR 0.78 (p=0.007). The CV death reduction is the most directly longevity-relevant finding in this trial.
RCT
SUSTAIN-6 — New England Journal of Medicine, 2016
n=3,297
Type 2 diabetes high CV risk. Semaglutide 0.5mg or 1mg weekly versus placebo. HR 0.74 (95% CI 0.58–0.95) for MACE. Primarily non-fatal stroke reduction. CV death did not significantly differ. Nonfatal MI significantly reduced. Smaller trial than LEADER — replication of mortality signal is from LEADER/SELECT.
§ The honest clinical position

Evidence tier: Strong. The case for clinical consideration rests on the mechanistic coherence and the published surrogate-endpoint human trial signal. The case for caution rests on the absence of hard longevity outcome data in adequately powered trials.

A physician discussing this intervention with a patient should communicate the evidence tier honestly and distinguish between what has been shown in published trials versus what is claimed in supplement marketing. The full Geroevidence profile includes the specific papers, effect sizes, and confidence intervals that inform this assessment.

This information is provided for educational reference only and does not constitute medical advice or a treatment recommendation.

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