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A testimonial from an EHS person illustrated by results of analyzes in two different moments of life. The EHS biomarker has been identified in a context of high electromagnetic fields (domestic and environmental) and strong EHS symptoms.

"Since 2012, I have known deep down that there was something wrong with my daily health. Indeed, I am someone naturally optimistic, determined and joyful, and I started to feel little by little depressed, stressed, constantly tired, with some of the most troubling symptoms...".

Toxicological test results
(Hair matrix - 49 metals)
Weak electromagnetic fields
Mild EHS symptoms
EHS biomarker
Not detected
Contamination to be monitored
Strong electromagnetic fields
Strong EHS symptoms
EHS biomarker

explained by the toxSeek scientific committee

What is a biomarker?

A biomarker is an endogenous (produced by our organism) or exogenous (not produced by our organism) indicator that can indicate/confirm a clinical condition such as electrohypersensitivity and/or indicate the severity of a clinical condition.

What is this EHS biomarker used for?

The EHS biomarker allows to make a toxicological diagnosis and/or to predict the appearance of EHS (if present in toxicological analyses spread over time). It is an objective criterion allowing the state of EHS to be asserted with certainty. In other words, it makes it possible to highlight the anatomical substratum of the EHS syndrome by excluding differential diagnoses of psychiatric disorders: in particular cenesthetic hallucinations, schizophrenic delusions in the productive phase, anxiety disorder with somatisation. On the other hand, it may allow an etiological (causal and symptomatic) curative treatment (eviction, chelation...).

This biomarker, being a quantifiable objective parameter, allows the detection of emerging environmental risks. We will be able to act, in a preventive way, on the sources of exposure or pollution (elimination or mitigation) by detecting exposed people and raising awareness among health professionals, the population and politicians.

Nouredine Sadeg

Dr N. Sadeg | Doctor in Pharmacy, Doctor in Toxicology, member of SFTA, member of TIAFT, expert at the Court of Appeal

H Belhadj

Dr H. Belhadj | | Doctor in Medicine, postgraduate degree in Oncology, postgraduate degree in Radiopharmacology, postgraduate degree in Pharmacokinetics, Doctor in Chemistry. Doctor in occupational toxicology, Doctor in Alcoholology. President of the French Association for the Progress of Medical Research (AFPREMED). Expert for the French National Agency for Food, Environmental and Occupational Health Safety (ANSES, Paris): 2008-2014

The toxseek hypothesis
Metal contamination and EHS symptoms

The toxSeek scientific committee has identified a rare metal and rare earth contamination profile
that could be an EHS biomarker.

This contamination was discovered during toxicological analyses of metals in the hair matrix.
Hair provides information on chronic contamination with inorganic pollutants (metals, heavy metals and rare earths)
3 cm of hair allow us to study 3 months of contamination.

EHS people or people suffering from chronic diseases can show a very particular profile:
Presence of metals (rare earths) in large amount and in high concentration (refer to the example of tets results and biomarker at the beginning of the article).


This metal contamination (rare earths) seems to be potentiated by electromagnetic fields (antenna effect).

A person suffering from electrosensitivity, known as EHSA person suffering from electrosensitivity, known as EHS

Metal (rare earths) contamination
Electromagnetic fields

Through their magnetic properties, rare earths interact with electromagnetic fields.
(increase in effects and sensitivity)

Appearance of EHS symptoms
(dermatological, neurasthenic,
chronic diseases…)


Rare earths

Rare earths are metals used in technologies and renewable energies: </blue> flat screens, leds, laptops, mobile phones, batteries, permanent magnets but also in some medicines and MRI contrast products.</blue> Rare earths have special magnetic properties (100 times better than a conventional magnet).

>> These metals are used more and more and are not subject to reprocessing or recycling.


Electromagnetic fields

The sources of electromagnetic fields are present in our daily life: (wifi, mobile phone, domestic electricity network...) but also in our environment (mobile phone relay antenna, high and medium voltage lines...). Electromagnetic fields interact with rare earths with high magnetic potential.

>> These electromagnetic fields are constantly increasing.

The EHS biomarker program

Do you think you are electrosensitive?

Get yourself tested

Track your metal contamination (metals, heavy metals, rare earths) with a simple hair analysis. Check for the presence of the EHS biomarker (Beta version).

Why a hair analysis?

The hair matrix is the only useful matrix for chronic toxicity. It allows a contamination study over several months. The toxSeek Metal toxicological analysis is based on a reference method (ICP-MS - Inductively Coupled Plasma Mass Spectrometry) and the results are verified by a medical biologist, doctor in pharmaco-toxicology. Hair samples are prepared (washed and mineralised) in such a way as to exclude any external pollution present on the hair. The certified laboratory is subject to external quality control (QMEQAS).


As part of your participation in the Biomarker EHS program, a special pricing has been set up: toxSeek Metal analysis - 88 euros VAT included instead of 110 euros - excluding shipping costs for the sampling kit. An email containing all the information will be sent to you at the end of your registration.


Share your data

In a second step, you will have the possibility to send us your data as part of a scientific research program that is currently being developed (Methodology MR-004).

You will be asked for authorization to use data as part of the research protocol.

- Implementation 2021 -

I belong to an association or a collective and I would like my members to participate in the research program: