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Longevity supplements › NMN and Aging › Studies

Animal study

In mice, early NMN cut heart valve inflammation and calcium; late NMN worked less

Qian and colleagues · European heart journal · 2026

Original title: Senescence-associated metabolic alterations aggravate calcific aortic valve disease.

Under review. A person has not yet checked this summary against the paper. It is written from the PubMed abstract. Until a person checks it, search engines are asked not to list this page.

What the study found

Points to benefit

In mice, early NMN restored valve NAD+ and reduced inflammation and calcium build-up; late treatment worked less well. Higher blood NAMPT was linked to higher risk of aortic stenosis.

The study at a glance

Type of study
Animal study
Who or what was studied
Human heart valve samples, mice, cultured cells and a large genetic database
What was tested
NAD+ making pathway loss in mice and cells; early vs late NMN in mice
What it measured
Lab tests or markers
Who has a stake
No disclosure in PubMed
No disclosure in PubMed. Funded by Chinese government research grants.
Journal
European heart journal, 2026
Source
PubMed record 41841768. This page is based on the abstract only.

How much this study counts

  • –Done in animals. Results in animals often do not carry over to people.
  • •The PubMed record has no conflict-of-interest statement.
  • •Summarized from the PubMed abstract only. The full paper may hold details the abstract leaves out.

✓ Strength– Limit• Note

These points come from fixed rules about the type of study, its size and length, what it measured, and who has a stake. Every study on Digestery gets the same rules.

Where this study sits

Each dot is one on-topic paper on this question. Steps near the top answer the question more directly.

↑ Stronger evidence

  1. Trials in people: aging and age-related decline

    0

    Not done yet. This is the step that would answer the question.

  2. Trials in people: other measures

    9

    3 benefit, 2 mixed, 4 no difference

  3. Trials in people: lab tests or safety

    7

    4 benefit, 1 mixed, 2 no difference

  4. Population studies

    0

    None among the papers we read.

  5. Blood levels and genes

    0

    None among the papers we read.

  6. Animals

    6

    5 benefit, 1 mixed

    ↑ This study is the ringed dot

↓ Weaker evidence

  • Points to benefit
  • Mixed
  • No difference
  • No direction
  • Points to harm

How it fits with the other research

The short answer to “Does NMN slow aging?”

Not shown in people so far.

Confidence: very low. Based on 29 on-topic papers.

Read the full answer

Of the other 5 papers on the same step: 4 benefit, 1 mixed. This one found benefit. It agrees with most of them.

  • Counted on the ladder, but not quoted in the page’s main findings.

Other papers on the same step

See all 29 studies on this question

How this page was made

Label

First read of the abstract
Claude Sonnet
Independent second read
Claude Haiku
Differences settled
The reviewer corrected 3 fields after reading the abstract. Claude Opus 5.5.
Headline
Claude Sonnet, from the checked study record. A script checked its numbers and wording.
Numbers
Checked against the abstract by a script
“How much this study counts”
Fixed rules, the same for every study
Source check by a person
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