Cacao is an all-natural health food that can benefit our bodies in many ways. From supporting our natural immunity and cardiovascular health to enhancing our cognitive function and boosting energy levels, cacao is a powerhouse of natural bioactive compounds and nutrients. However, there are growing concerns surrounding cadmium content in cacao and the potential risks to our health from this.

Cadmium is a non-essential heavy metal that is toxic to humans and exposure to cadmium can have major impacts on human health by damaging our immune system, disrupting our endocrine system, increasing oxidative stress and even increasing our risk of cancer^1–6. One of the major mechanisms by which cadmium causes health problems is by triggering acute and chronic inflammatory responses throughout the body, such as in the heart, liver, kidneys, and lungs^1–6. Cadmium is also able to accumulate in the liver and kidneys for up to 30 years meaning that exposure to low cadmium levels pose a serious health risk^5,7.

Cadmium is a naturally occurring heavy metal found in soil, rock, and waters, which enters the environment through volcanic activity, forest fires, and rock erosion and weathering^8,9. However, cadmium is a versatile resource in modern industrial processes, such as in nickel-cadmium batteries, and is thus readily mined for by large mining companies^6,8. Oil and mining companies that mine for resources other than cadmium still cause severe disruptions to the surrounding land. These disruptions lead to excess cadmium pollution in the surroundings, which can be taken up by plants from the air, water, and soil^7,10–13. Some of the largest oil-producing countries in the world are based in South America, including Brazil, Mexico, Ecuador, Venezuela and Colombia,¹⁴ and cacao has now been identified as a potential source for cadmium exposure^7,10–13.

It is important to know that cacao is not the only source of cadmium contamination. Cadmium is also an issue in other crops around the world, including vegetables and fruits in Spain¹⁵, oats in Canada¹⁶, fruits in China¹⁷, and vegetables in Poland¹⁸. Exposure to cadmium is also common in those who smoke contaminated tobacco or consume foods that have been heavily treated with phosphate-based fertilisers^7,8. Those who live and work in areas where mining occurs, such as near mines in South America or abandoned e-waste sites in China, are at especially high risk of cadmium exposure^1–4,10. Research by the European Food Safety Authority (EFSA) found that foods consumed in higher amounts had the greatest impact on cadmium exposure, instead of foods that had the highest levels of cadmium¹⁹. This means that foods such as vegetables, grains and cereals, and foods containing high amounts of sugar have the greatest impact on cadmium exposure. 

Many efforts are being made to minimise and reduce cadmium contamination in cacao crops in South America. Cadmium uptake by plants is influenced by many factors and high levels of cadmium in the soil does not always mean that plants will have high levels of cadmium^7,9. Additionally, cadmium concentration decreases in the cacao tree from the roots to the rest of the tree so that cadmium concentration is generally lower in the cacao beans themselves^7,9,12. The process of cacao fermentation after harvesting has also been shown to decrease cadmium levels in cacao¹².

Properties of the soil in which cacao is grown can also be adjusted to reduce cadmium uptake, such as the pH, texture, soil composition, and the natural microbes present^7,9. Organic farming that makes use of natural fertilisers and pesticides can also minimise cadmium uptake by cacao as synthetic fertilisers and pesticides are often contaminated by cadmium⁷.

Regulations by the European Union (EU) specify maximum levels of cadmium allowed in various cacao-based products, which have been in place since January 2019²⁰. Regular testing of cacao-based products for cadmium and other heavy metals is thus important to ensure that those products contain safe levels of cadmium. Our cacao is regularly tested for cadmium and other heavy metals to ensure that our products are always within the safety regulations set out by the EU. Our latest test showed our cacao to contain 0.4 mg/kg of cadmium, which is below the maximum permitted cadmium levels set out by the EU.

The world’s highest quality cacao is produced in South America but the risk of cadmium exposure has become a growing health concern. To ensure that cadmium levels in our products are minimised and that they remain of a high quality, we regularly test our cacao for cadmium and other heavy metals and make our products by farm-to-table organic farming. This ensures that our products are safe for the environment, safe for the farmers to grow, and safe for you to consume.