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Study summary · Senescence, senolytics & the hallmarks of aging

Does hyperbaric oxygen therapy (HBOT) affect telomere length and senescent cell concentrations in healthy aging adults?

In one paragraph

Hyperbaric oxygen therapy (Aging (Albany NY) 2020, PMID 33206062) — b cell telomere length showed the most significant increase, rising by 25.68% at session 30, 29.39% at session 60, and 37.63% post-HBOT. The study involved a specific HBOT protocol and a relatively small sample size of healthy, independently living adults, which may limit generalizability.

Source: Aging (Albany NY) 2020, PMID 33206062 ↗ · Research map · How Magellan grades evidence · evidence confidence: high

Aging (Albany NY) · 2020 · PMID 33206062 · DOI 10.18632/aging.202188

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

Hyperbaric oxygen therapy significantly increased telomere length and reduced senescent cell percentages in various immune cells in healthy older adults.

The question

Does hyperbaric oxygen therapy (HBOT) affect telomere length and senescent cell concentrations in healthy aging adults?

What they tested

Repeated intermittent hyperoxic exposures, such as certain HBOT protocols, may induce regenerative effects that could impact telomere length and cellular senescence.

How they did it

Thirty-five healthy adults, aged 64 and older, received 60 daily HBOT exposures. Whole blood samples were collected at baseline, after 30 and 60 sessions, and 1-2 weeks post-HBOT. Peripheral blood mononuclear cells (PBMCs) were analyzed for telomere length and senescence.

What they found

Telomere length in T helper, T cytotoxic, natural killer, and B cells increased significantly by over 20% after HBOT. B cell telomere length showed the most significant increase, rising by 25.68% at session 30, 29.39% at session 60, and 37.63% post-HBOT. There was a significant decrease in senescent T helper cells by -37.30% post-HBOT and senescent T-cytotoxic cells by -10.96% post-HBOT.

Change in B Cell Telomere Length Following HBOT
Values shown: Percentage Increase (%)
30 Sessions25.68
60 Sessions29.39
Post-HBOT37.63

Percentage increase in B cell telomere length at different stages of hyperbaric oxygen therapy.

What it means

Hyperbaric oxygen therapy (HBOT) may induce significant senolytic effects in aging populations, including increasing telomere length and clearing senescent cells.

Limitations

The study involved a specific HBOT protocol and a relatively small sample size of healthy, independently living adults, which may limit generalizability.

“Telomere length of T helper, T cytotoxic, natural killer and B cells increased significantly by over 20% following HBOT... senescent T helper cells decreased by -37.30% post-HBOT.”— from the published abstract, Aging (Albany NY) 2020

The paper at a glance

TitleHyperbaric oxygen therapy increases telomere length and decreases immunosenescence in isolated blood cells: a prospective trial
JournalAging (Albany NY)
Year2020
PMID33206062 ↗
DOI10.18632/aging.202188 ↗
TopicSenescence, senolytics & the hallmarks of aging

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

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.

Hyperbaric oxygenTelomeresSenescent cellsSenolytics

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 hyperbaric oxygen therapy (HBOT) affect telomere length and senescent cell concentrations in healthy aging adults? [Plain-English summary of Aging (Albany NY) 2020, PMID 33206062, DOI 10.18632/aging.202188]. Magellan Longevity. https://magellanlongevity.com/study/hbot_telomere.html
BibTeX
@misc{magellan_hbot_telomere, title = {Does hyperbaric oxygen therapy (HBOT) affect telomere length and senescent cell concentrations in healthy aging adults?}, author = {{Magellan Longevity}}, year = {2026}, howpublished = {\url{https://magellanlongevity.com/study/hbot_telomere.html}}, note = {Plain-English summary of PubMed PMID 33206062; DOI 10.18632/aging.202188; Aging (Albany NY) 2020. Reviewed by Gabriel Radu, DO}, urldate = {2026-08-11} }
Permalink
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How this summary was made. Every section above restates what the published abstract of PMID 33206062 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.