Cod liver oil facts for kids
Cod liver oil is a special dietary supplement. It comes from the liver of the Atlantic cod fish. Like other fish oils, it has healthy omega-3 fats, such as EPA and DHA. It also contains important vitamin A and vitamin D.
For many years, especially in the 1800s, children were given cod liver oil. In 1920, scientists discovered that a lack of vitamin D caused a bone disease called rickets. Because cod liver oil is full of vitamin D, it became a popular way to help prevent this condition.
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Cod Liver Oil
How Cod Liver Oil is Made
Making cod liver oil has changed a lot over time. Long ago, people like the Vikings had a simple method. They would place fresh cod livers over boiling water. The steam would gently heat the livers, and the oil would slowly drip into the water. This oil was then carefully collected. This traditional oil was usually pale and had a mild taste.
During the Industrial Revolution, people found ways to make more oil. Sometimes, livers were left in barrels, and the oil was skimmed off as it separated. This method often produced a darker, stronger-smelling oil.
Today, modern methods ensure the oil is clean and pure. One famous method, invented by Peter Möller in 1850, involves gently cooking ground livers with water. The oil rises to the top and is then skimmed off and cleaned. Other modern ways use pressure or cold processes. All these methods aim to create a pure, high-quality oil for people to use.
Why People Use Cod Liver Oil
Cod liver oil is special because it has more vitamin A and vitamin D than most other fish oils. Just one tablespoon (about 14.8 mL) contains a lot of these important vitamins.
Essential Vitamins
- Vitamin A is essential for good vision, a healthy immune system, and healthy skin.
- Vitamin D helps your body absorb calcium, which is vital for strong bones and teeth. It also supports your immune system.
Healthy Omega-3 Fats
This oil also contains about 20% omega-3 fatty acids. These are healthy fats that are good for your brain and heart. Some studies suggest that omega-3s in cod liver oil may help support heart health. They might also help with certain skin conditions like psoriasis and could even help support a healthy mood.
Important Things to Know About Cod Liver Oil
While cod liver oil is good for you, it's important not to take too much. This is especially true because of the high amount of vitamin A it contains.
Taking too much vitamin A can be harmful. For example, just one tablespoon of cod liver oil can have more vitamin A than an adult needs in a day. For younger children, even a small amount like a teaspoon can be too much. Vitamin A can build up in your body, especially in your liver, and cause problems if there's too much.
Always follow the directions on the supplement bottle. Or ask a trusted adult or doctor how much to take. It's also important that the oil is purified properly during manufacturing. This removes any unwanted substances.
Other Interesting Uses
Cod liver oil has been used for more than just health!
In Newfoundland and Labrador, Canada, people sometimes mixed cod liver oil with traditional red ochre paint. This paint was used on buildings related to fishing, like sheds and workshops. The oil helped the paint stick and protect the wood.
In Tübingen, Germany, there's a fun annual boat race called the Stocherkahnrennen. The team that comes in last place gets a funny punishment. They have to drink a glass of cod liver oil!
See also
- Dan Dale Alexander
- Shark liver oil
