Endocrine Disruptors: Hormonal Impact and Nutritional Strategies for Your Health

In our daily lives, we are constantly exposed to thousands of synthetic chemicals found in containers, cosmetics, pesticides and even tap water. Known by the acronym EDCs (Endocrine-Disrupting Chemicals), endocrine disruptors are defined by the World Health Organization (WHO) as exogenous chemicals capable of altering the proper functioning of the hormonal system and its metabolic pathways.

Although the human body has effective biological mechanisms for adaptation and neutralisation, continuous exposure to these substances poses a challenge to overall well-being, physical performance and body composition optimisation.

In this article, we explain clearly and based on the available evidence what they are, where they can be found and which habits you can adopt to reduce your exposure.

What are endocrine disruptors and how do they alter the hormonal system?

Endocrine disruptors are exogenous molecules that interfere with physiological processes regulated by the endocrine system. Unlike other environmental toxins with immediate or acute effects, these substances stand out for their ability to act at extremely low doses and bioaccumulate in adipose tissue.

The endocrine system uses hormones as chemical messengers to regulate vital functions such as energy management, protein synthesis and the maintenance of muscle mass.

When an EDC enters the body, it disrupts the balance of this communication channel by interfering with the synthesis, secretion, transport or metabolism of endogenous hormones.

Mechanisms of action: Mimicry, blocking and metabolic disruption

At the cellular level, endocrine disruptors (such as xenoestrogens or antiandrogens) generally act through three main mechanisms:

1. Molecular mimicry: The exogenous compound mimics the structure of a natural hormone (such as oestrogen) and binds to its cellular receptor, activating hormonal signalling at the wrong time or to a disproportionate degree.
2. Receptor blocking: The chemical binds to the cellular receptor without activating it, acting as a “plug” that prevents the endogenous hormone (for example, testosterone) from exerting its normal biological function.
3. Alteration of enzymatic clearance: They interfere with the enzymes responsible for synthesising or breaking down hormones, undesirably prolonging or shortening their circulating half-life.

Main sources of exposure in everyday life and sport

Reducing the EDC burden requires identifying the main routes through which these substances enter the body via diet, personal care products and the environment.

Plastics, bisphenols (BPA) and phthalates in the food environment

Bisphenol A (BPA) and phthalates are plasticisers used to provide flexibility or durability to rigid containers and food cans. The main risk lies in leaching: the migration of these chemicals from the container into food or beverages, particularly when exposed to heat or acidic conditions.

For athletes who regularly consume water or shakes during training, choosing the right container is particularly important. Using BPA- and phthalate-free shaker cups and shaker bottles (made from polypropylene or food-grade stainless steel) helps ensure safe consumption without unwanted contaminants.

Pesticides, heavy metals and organochlorines in the food chain

Certain pesticides used in conventional agriculture and heavy metals such as cadmium or mercury tend to accumulate throughout the food chain.

When selecting foods and food supplements, prioritising certified raw materials with traceability controls and environmental contaminant testing helps ensure the highest possible purity profile.

Effects on testosterone, thyroid function and physical performance

Continuous environmental exposure to endocrine disruptors may result in small, sustained imbalances that can compromise vitality, sports performance and recovery capacity.

Suppression of the testicular axis and reduced free testosterone

Scientific evidence indicates that prolonged exposure to xenoestrogens and antiandrogenic compounds may interfere with testicular steroidogenesis. By blocking or altering signalling within the hypothalamic-pituitary-gonadal axis, this may result in lower availability of free testosterone, a key hormone for maintaining muscle mass, strength and overall energy.

Disruption of the thyroid axis and alterations in metabolic rate

Substances such as perchlorate or triclosan may compete with iodine or interfere with the binding of thyroid hormones (T3 and T4) to their peripheral receptors.

Since the thyroid gland acts as the central regulator of basal energy expenditure, this interference may make body weight management more difficult and contribute to a feeling of chronic fatigue.

Evidence-based strategies to support liver function and cellular elimination

Fortunately, the human body has a key organ designed to process and eliminate exogenous lipophilic substances: the liver.

The liver processes these substances through two coordinated metabolic stages:

1. Phase I (Transformation): Through the Cytochrome P450 enzyme system, the liver modifies fat-soluble molecules by introducing reactive groups to prepare them for subsequent neutralisation.
2. Phase II (Conjugation): Specific enzymes bind intermediate molecules to endogenous substrates (such as glutathione or sulphur) to transform them into water-soluble compounds that can be eliminated through bile or urine.

The glutathione pathway and the role of N-Acetyl Cysteine (NAC)

Reduced glutathione (GSH) is the main endogenous antioxidant involved in the conjugation of exogenous metabolites during hepatic Phase II. During periods of high oxidative stress or prolonged environmental exposure, biological glutathione stores may become depleted.

N-Acetyl Cysteine (NAC) acts as a highly effective direct precursor for endogenous glutathione synthesis by providing thiol (-SH) or sulphur groups. NAC supplementation supports the availability of the substrate required to sustain enzymatic conjugation reactions, contributing to cellular protection against oxidative damage caused by environmental toxins.

Phytotherapeutic compounds and supportive micronutrients

Certain plant extracts and nutritional compounds have shown the ability to interact with the body’s natural cellular response mechanisms:

5 Steps to minimise the impact of EDCs in your daily routine

Making simple changes to your daily habits can help you significantly reduce your everyday exposure to these substances:

1. Replace plastic with glass or stainless steel for food containers, bottles and shakers, particularly when heating their contents.
2. Check the labels on your cosmetics and prioritise products free from parabens and phthalates.
3. Filter your drinking water whenever possible, particularly if it comes through old pipes.
4. Cook at moderate temperatures and avoid exposing plastics directly to high temperatures (microwaves, high-temperature dishwasher cycles).
5. Ensure an adequate intake of antioxidant micronutrients as part of a varied and balanced diet and an overall healthy lifestyle.

Bibliographic References

1. Gore, A. C., Chappell, V. A., Fenton, S. E., Flaws, J. A., Nadal, A., Prins, G. S., Toppari, J., & Zoeller, R. T. (2015). EDC-2: The Endocrine Society’s Second Scientific Statement on Endocrine-Disrupting Chemicals. Endocrine Reviews, 36(6), E1–E150.
2. Diamanti-Kandarakis, E., Palioura, E., Kandarakis, S. A., & Kandaraki, E. (2009). Endocrine-disrupting chemicals: an Endocrine Society scientific statement. Endocrine Reviews, 30(4), 293–342.
3. Rochester, J. R. (2013). Bisphenol A and human health: a review of the literature. Reproductive Toxicology, 42, 132–155.
4. Zoeller, R. T., Brown, T. R., Doan, L. L., Gore, A. C., Skakkebaek, N. E., Soto, A. M., Woodruff, T. J., & Vom Saal, F. S. (2012). Endocrine-disrupting chemicals and public health protection: a statement of principles from The Endocrine Society. Endocrinology, 153(9), 4097–4110.
5. Hodges, R. E., & Minich, D. M. (2015). Modulation of Metabolic Detoxification Pathways Using Dietary Biotransformation Agents. Journal of Nutrition and Metabolism, 2015, 760801.

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