5G and health: what does science say in 2026?
Is 5G dangerous to your health? We walk through the physics, the WHO, ICNIRP and SSM reports, and the latest research on non-thermal effects of radio frequencies.
5G has become the foundation of the modern digital world, delivering ultra-fast internet and powering millions of "smart" devices. But along with the antennas appearing on rooftops, public concern has grown too: how does constant exposure to radio-frequency fields affect our bodies?
Let's break this down using the latest reports from international scientific organizations and current research.
1. The physics: ionizing vs non-ionizing radiation
To understand 5G, it helps to revisit high-school physics. The electromagnetic spectrum splits into two big parts:
- Ionizing radiation (X-rays, gamma rays) — high enough energy to knock electrons out of atoms and damage DNA directly.
- Non-ionizing radiation (radio waves, microwaves, visible light) — does not carry enough energy to break chemical bonds in cells.
5G is non-ionizing radiation. Its main physical effect on biological tissue is the thermal effect (a small amount of heating), which is strictly capped by international safety standards.
2. Where the major bodies stand (2025–2026)
Leading scientific institutes continue to monitor 5G. As of today the consensus is unchanged: under the established exposure limits, no health risk has been confirmed.
| Organization | Position and most recent data |
|---|---|
| WHO | Reports from 2025 note no evidence of a link between low-level RF exposure and the development of cancer or other pathologies. |
| ICNIRP | The International Commission on Non-Ionizing Radiation Protection updated its guidelines in 2020 (still in force in 2026); they account for 5G specifics and protect against all confirmed effects. |
| SSM (Sweden) | The 20th annual report (published in early 2026) confirmed that no new causal links between EMF and health risks have been established. |
3. Millimeter waves (mmWave): what's special
One distinguishing feature of 5G is its use of higher frequencies (above 24 GHz). It's important to understand: the higher the frequency, the shallower the wave penetrates human tissue.
- Surface absorption. Millimeter waves are absorbed almost entirely by the upper skin layers (epidermis) and the cornea, never reaching internal organs.
- Beamforming. Unlike 4G, which radiates in all directions, 5G focuses a narrow beam directly at your device. That reduces "background" exposure for nearby people who are not actively using the network.
4. What scientists are still debating (current research)
Despite the broad safety consensus, science doesn't stand still. Researchers are studying so-called "non-thermal effects."
- Oxidative stress. Some animal lab tests show an increase in oxidative-stress markers under prolonged exposure. It's still unclear how that translates into actual health damage in humans at normal exposure levels.
- Rodent studies. Experiments in 2024–2025 (for example at Tomsk State University) showed changes in rat brain tissue under intensive irradiation. Researchers stress that animal results cannot be directly transferred to humans because of differences in size and physiology.
Worth noting: the International Agency for Research on Cancer (IARC) classifies radio-frequency fields as "possibly carcinogenic" (Group 2B). The same group also includes pickled vegetables and aloe vera. That means a link is not ruled out, but there is currently no compelling evidence for it.
Takeaway
As of today, 5G is considered safe technology as long as international standards (ICNIRP) are respected. Radiation levels from base stations in residential areas are typically tens or hundreds of times below permitted limits.
If you want to minimize personal exposure, follow these simple tips:
- Use a headset for long calls.
- Don't sleep with your smartphone under the pillow.
- Remember that a device emits more strongly in areas with poor reception.
Sources
- World Health Organization (WHO): Electromagnetic fields and 5G
- ICNIRP: Guidelines for limiting exposure to electromagnetic fields (100 kHz to 300 GHz)
- Strålsäkerhetsmyndigheten (SSM): Recent Research on EMF and Health Risk (20th report, 2026)
- ITU: Strategies and policies concerning human exposure to EMF (2025)