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Blood Marker of Cell Damage Linked to Cancer Risk in Women With HIV

A new cohort study found one blood marker of cell damage tied to higher cancer risk in a small group of women with HIV.

By Dr. Axe Editorial Team · October 29, 2026 · 1 source · Watch

Photo: Pexels

At a glance

What they found: Adding these biomarkers to a prediction model for older adults improved accuracy from a C-index of 0.9 to 0.9, holding up in cross-validation.

A blood marker of oxidative damage to fats was linked to nearly three times the risk of developing a non-AIDS-related cancer in women with HIV in an exploratory analysis, according to a case-cohort study published October 19, 2026 in GeroScience.

332people with HIV

15%of group was female

Researchers tracked 332 people with HIV on antiretroviral therapy in Spain's CoRIS cohort, measuring baseline plasma oxidative stress biomarkers and comparing them against who later developed a non-AIDS-defining cancer. Across the whole group, oxidative stress biomarkers showed no overall association with cancer risk.

In an exploratory sex-split analysis, higher levels of 4-HNE, a byproduct of fat oxidation, were linked to an adjusted hazard ratio of 2.79 for cancer in women (95% CI, 1.14-6.80), but not in men. Only 15.4% of the group was female. Age also changed how 4-HNE and oxidized LDL related to cancer risk, though age-specific estimates in adults 50 and older had wide confidence intervals and did not reach significance alone. Adding these biomarkers to a prediction model for older adults improved accuracy from a C-index of 0.863 to 0.877, holding up in cross-validation (0.586 to 0.632).

4-HNE and oxidized LDL form when fats in cell membranes and blood are damaged by free radicals, a process called lipid peroxidation. The authors say these exploratory findings suggest that fat damage may be tied to cancer risk in certain subgroups of people with HIV, and that larger studies need to confirm it.

Cancer Risk Tied to 4-HNE Levels in Women

GeroScience, 2026, Coca-LaCalle

The female subgroup was only about 15% of participants, so the 2.79-fold finding rests on few cases and needs testing in a larger, dedicated study of women with HIV. The age-related pattern also wasn't statistically significant in older adults alone, pointing toward subgroups deserving closer study rather than a finding ready to guide care.

Dr. Axe’s Take

This is a hypothesis-generating finding, not a reason to order a 4-HNE test tomorrow. The sex difference stands out to me: women on long-term HIV treatment may carry a distinct oxidative burden that general cancer-risk models miss. If I were counseling a woman with HIV, I'd focus on lowering oxidative stress through colorful vegetables, berries, and olive oil, along with consistent sleep and limited alcohol, since these all influence fat oxidation in the body. Keep taking antiretroviral therapy as prescribed, and bring up cancer screening with a specialist rather than waiting on this biomarker.

— Dr. Axe

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Study summary

Who: 332 adults with HIV on antiretroviral therapy from Spain's CoRIS cohort; 15.4% female.
Design: Case-cohort study with Cox proportional hazards models testing effect modification by sex and age.
Dose: Not applicable; biomarkers were measured in baseline blood plasma, not administered.
Primary result: No overall link between oxidative stress markers and cancer risk; in women, higher 4-HNE linked to 2.79-fold higher risk (95% CI, 1.14-6.80).
Secondary: Age modified 4-HNE and oxidized LDL associations with cancer risk; adding biomarkers to a model for older adults raised accuracy (C-index) from 0.863 to 0.877.
Funding / conflicts: Competing interests: The authors declare they have no competing interest. Funding not reported in the abstract.
Date: Oct 19, 2026