Warning: FSAI Advises Against Consumption of Calabash Chalk Due to Lead Risks
The Food Safety Authority of Ireland (FSAI) has issued a critical health warning urging consumers—specifically pregnant women and those who are breastfeeding—to avoid the consumption of calabash chalk. The alert comes after the discovery of high levels of lead in the product, a toxic metal that poses severe risks to fetal and infant development.
While some use the substance as a traditional remedy for morning sickness, health officials warn that the risks of lead exposure far outweigh any perceived benefits. Lead can accumulate in the body over time and is easily transferred to unborn babies during pregnancy and to infants through breastfeeding.
What is Calabash Chalk?
Calabash chalk is a substance often sold in ethnic shops in blocks, pellets, or powders, frequently with limited labeling or consumer information. It is known by several different names depending on the region and culture, including:

- Calabar chalk or Calabar stone
- La craie, argile, nzu, ndom, eko, or mabele
The composition of the product varies. It may occur naturally, consisting of fossilised seashells, or it may be artificially produced using a mixture of clay, sand, wood ash, and other materials.
The Severe Health Risks of Lead Exposure
Lead is a potent neurotoxin. When consumed, it enters the bloodstream and can settle in the organs, and bones. For adults, chronic exposure is dangerous, but for developing fetuses and young infants, the impact is devastating.
According to the Food Safety Authority of Ireland, lead exposure is associated with a range of adverse health effects, most notably its impact on the developing brain. Because a child’s body and brain are growing rapidly, lead can severely interfere with these critical developmental processes.
Mr. Greg Dempsey, Chief Executive of the FSAI, emphasized the gravity of the situation, stating, “High levels of lead in calabash chalk is a serious public health concern. Lead can have harmful effects, particularly for unborn babies and infants, where it can severely affect how a child’s body grows and their brain develops. At very high levels, lead poisoning can be fatal.”
Actionable Guidance for Consumers
If you or someone you know is using calabash chalk, the FSAI provides the following directives:
- Stop Use Immediately: Pregnant and breastfeeding women should cease consuming the product immediately to prevent further lead exposure.
- Seek Medical Advice: Anyone who has consumed calabash chalk and feels unwell should contact a healthcare provider for an evaluation.
- Check Labels: Be cautious of traditional remedies sold in ethnic shops that lack comprehensive ingredient lists or safety warnings.
- The Danger: High levels of lead found in calabash chalk.
- High-Risk Groups: Pregnant women and breastfeeding mothers.
- Primary Risk: Severe impairment of fetal and infant brain development; potential fatality at high levels.
- Common Names: Also known as Calabar chalk, nzu, ndom, or la craie.
- Recommendation: Stop use immediately and consult a doctor if feeling unwell.
Frequently Asked Questions
Why is calabash chalk used for morning sickness?
In some cultures, it is used as a traditional remedy to alleviate the nausea associated with pregnancy. However, medical experts warn that these traditional uses do not account for the toxic contamination found in many of these products.

How does lead get into the body?
Lead is ingested when the chalk is eaten. Once in the system, it can cross the placental barrier during pregnancy or be secreted into breast milk, directly exposing the child to the toxin.
Where is this product typically found?
The FSAI notes that these products are imported into Ireland and are typically available in certain ethnic shops.
Ensuring the safety of maternal and infant health requires moving away from unverified traditional remedies in favor of evidence-based medical care. For those struggling with morning sickness, consulting a licensed physician can provide safe, lead-free alternatives for symptom management.