Yes, milk does contain iodine, and it can be a significant source of this essential mineral in many diets.
Iodine in Milk: A Key Dietary Source
Milk is recognized as a notable source of iodine, with dairy products contributing substantially to the total daily iodine intake in many populations. In the United States, for example, dairy accounts for 49% of the total estimated daily iodine consumption from food [15]. This makes milk one of the most common food sources of iodine [16,17].
Why is Iodine in Milk?
The presence of iodine in milk is mainly due to:
- Animal Feed: Iodine is often added to cattle feed to ensure their health, which eventually transfers to milk.
- Sanitizing Agents: Iodophor solutions used for sanitizing milking equipment can also contribute to the iodine content in milk.
The Importance of Iodine
Iodine is crucial for:
- Thyroid Function: It is essential for the production of thyroid hormones, which regulate metabolism.
- Cognitive Development: Adequate iodine intake is especially important for brain development in infants and children.
Table: Contribution of Dairy to Iodine Intake (Example from the US)
| Source | Contribution to Daily Iodine Intake |
|---|---|
| Dairy Products | 49% |
Milk as a Dietary Source of Iodine
Due to the significant contribution of dairy products to iodine intake, milk can be an important dietary source, particularly in areas where other iodine-rich foods are scarce. However, it's also important to be mindful of the varying levels of iodine in milk based on factors like farm practices and geographical location.
