Why is there lead in canned tuna?
Lead is a heavy metal that is found in nature and it may reach tons through the food chain in the depths of the oceans. Tuna is a predatory fish that is high in the marine food chain, so it is exposed to more water pollutants and these accumulate in its body, including lead and other substances. In the past, heavy metals such as lead and mercury were associated with heavy industry, but today they are an integral part of environmental pollution and affect animals and our food sources.
Dr. Azaria explains that it is recommended to limit the consumption of tuna to no more than 3 times a week. “Although the amounts of lead in tuna are very low, the fact that they exist should not be ignored. Lead is a well-known poison, hence the importance of awareness of controlled consumption.” According to Azaria, a varied and controlled diet should be preferred in order to reduce the chance of lead accumulation in the body, especially among children, on whom the effect of lead is particularly strong.
Children are the most vulnerable group to lead exposure, due to their small body weight and developing body systems. When lead enters the body, it may bind to tissues and affect different systems in the body. Certain concentrations of lead can damage the nervous system and kidneys, cause heart disease and fertility disorders. In extreme cases of exposure to lead in high concentrations, there is a risk of serious injury or even death.
It is important to remember that even among adults, long-term exposure to lead can cause cumulative damage to the body. Pregnant women and the elderly, for example, are more vulnerable to the effects of lead and it is recommended that they avoid consuming large amounts of tuna or look for alternatives such as salmon and smaller fish.
Dr. Azaria points out that it is not necessary to completely avoid tuna, but one must observe controlled consumption and be aware of healthy dietary recommendations.
“For the most part, it’s all a matter of dosage,” she emphasizes, “tuna also contains healthy components such as proteins, omega-3 fatty acids and important vitamins – so it can be included in the menu in a balanced way.”
Rules for reducing exposure to lead
There are some simple rules that can help reduce exposure to lead, especially among children or sensitive populations. Here are some of them:
- controlled consumption – As mentioned, you should limit the consumption of tuna to a few times a week, and incorporate other protein sources into the menu.
- Choosing different protein sources.
A varied and balanced menu helps the body cope | Photo: Tatjana Baibakova, shutterstock - A varied and balanced menu – Incorporating a wide variety of vegetables, fruits, grains and legumes in the daily menu can help the body deal with heavy metals and provide additional important nutrients.
- Preference for natural and unprocessed food – Processed products may contain food additives and other factors that may burden the body. A diet based on natural and whole foods will provide the body with the essential components it needs to stay healthy.