Kitchen materials and health: what to consider

The safety of food depends not only on its origin or nutritional quality, but also on the materials it comes into contact with during preparation, cooking and storage. Scientific evidence suggests that some materials used in the kitchen can, under certain conditions, release small quantities of potentially undesirable substances, especially when exposed to high heat, prolonged contact or acidic foods.

These releases tend to occur discretely and cumulatively. Although in most cases they are not associated with immediate effects, repeated exposure over time can be relevant from a health point of view, especially when considered in the overall context of lifestyle and the total load of exposures to which the body is subjected on a daily basis.

In addition to plastic, there are other common kitchen materials that could benefit from more informed use.

• Aluminium: Aluminium is widely used in kitchen utensils due to its lightness and good heat conduction. However, it is a material that, under certain circumstances, can be more prone to releasing small amounts of aluminium into food. This migration can occur above all when aluminium is exposed to high temperatures or in contact with acidic foods. For this reason, some caution is usually suggested when using aluminium containers to cook or store hot or acidic foods, such as tomato sauces or citrus fruits, particularly when contact is prolonged.
• Copper: Copper is an excellent thermal conductor, which is why it is often used in kitchen utensils. However, direct contact between copper and food, especially acidic food, is generally not recommended, as copper can be released into the food. For this reason, the copper utensils available today mostly have an internal coating that prevents such direct contact. The integrity of this coating is an important aspect, since wear and tear can increase the likelihood of metal migration.
• Composite bamboo utensils: As a natural material, bamboo does not raise significant concerns on its own. However, many utensils marketed as “bamboo” are in fact composite materials that include synthetic resins such as melamine. Under certain conditions, particularly when exposed to high heat or acidic foods, these materials can release small quantities of undesirable substances. They should therefore be used in accordance with the manufacturer's instructions, avoiding situations for which they were not designed, such as heating.

Materials considered more stable

Some materials are generally more chemically stable and less likely to release substances during use, and are often considered safer options for cooking and storing food:

• Stainless steel, valued for its durability and stability
• Enamelled cast iron, suitable for cooking at high temperatures
• Tempered glass, used for storing and heating food
• Ceramics, as long as they are of good quality and use enamels suitable for food contact

A conscious approach to everyday life

Talking about toxicity does not imply eliminating all materials considered less ideal, but rather understanding in which contexts certain utensils may represent greater exposure and when their use should be more judicious.

In Integrative Osteopathy, this attention to everyday habits, including the materials used to cook and store food, is part of an overall assessment of health and lifestyle.