Fish liver oil, extracted from the livers of sharks, cod, and similar species, is a yellow fat with a fishy odor. It primarily contains vitamins A and D. It is used to prevent and treat deficiencies in vitamins A and D, such as rickets, night blindness, and infantile tetany. Below, we introduce the best times to take fish liver oil and how to supplement it appropriately, hoping this information proves helpful.
When is the best time to take cod liver oil?
1. Frequency: For children, one capsule daily is generally sufficient. If calcium deficiency is severe, add one more capsule daily. Adults typically take 2-3 capsules daily, spaced 6-8 hours apart.
2. Duration: Children should take cod liver oil consistently. Before age 3, it's best to take it continuously for three to four months, then pause before resuming. Adults can take it as needed in smaller doses.
3. Timing: It's generally better to take cod liver oil in the morning. For children needing calcium supplementation, taking an additional calcium supplement before bedtime is recommended.
4. Administration Method: For infants under 1 year old, an adult must bite open the cod liver oil capsule, squeeze the liquid into the baby's mouth, and then consume the capsule shell themselves to absorb nutrients.For children over 2 years old with improved chewing ability, they can be allowed to bite the capsule into pieces and swallow it directly, but adults should supervise to ensure thorough chewing.
5. Due to its distinctive fishy odor, some children may resist taking cod liver oil. Parents can mix the drops into porridge, rice, or formula for consumption.
How to Supplement Cod Liver Oil Appropriately
Cod liver oil provides essential micronutrients often needed by infants and young children, especially those breastfed. However, supplementation must be scientifically and reasonably managed, with daily intake being critical.
The U.S. National Institutes of Health recommends the following daily vitamin A intake for infants and children aged 0–3 years: 2,000 IU. For vitamin D, the recommended daily intake is: 1,000 IU for 0–6 months, 1,500 IU for 6–12 months, and 2,500 IU for 1–3 years. Intake within these ranges is considered safe.According to Pediatrics, vitamin D toxicity can occur in children after several weeks or months of daily doses ranging from 20,000 IU to 50,000 IU, or 2,000 IU/kg. In sensitive children, toxicity may develop after 1 to 3 months of daily doses exceeding 4,000 IU.Chronic toxicity in infants and young children can occur with daily vitamin A intake of 50,000–100,000 IU over six months. Some reports indicate toxicity symptoms appeared within one month at just 25,000 IU daily. Breastfed infants receive insufficient vitamin D from breast milk to meet their daily requirements.Infants require 400 IU of vitamin D daily. Therefore, in addition to consuming at least 1000 ml of formula milk per day (which may contain up to 400 IU of vitamin D), breastfed or mixed-fed infants should supplement with 400 IU of vitamin D drops. In the absence of pure vitamin D supplements, safe doses of cod liver oil or vitamin AD drops may be used as alternatives.
Symptoms of cod liver oil toxicity typically include loss of appetite, weight loss, frequent urination with low urine volume, low-grade fever, constipation, nausea, and vomiting. Severe cases may involve excessive calcium ion absorption, leading to reduced nerve and muscle excitability manifested as mental inhibition and motor coordination disorders.
If cod liver oil toxicity is confirmed, administration should be immediately discontinued to prevent further vitamin A absorption.For acute poisoning, discontinue the supplement for two days and promptly seek hospital treatment for intravenous fluids and symptomatic management. Symptoms will gradually subside. However, in cases of chronic poisoning, symptoms like headaches and vomiting may disappear after 12 weeks of discontinuation. Yet, blood vitamin A levels remain elevated at this stage. It is essential to cease supplementation for an additional six months to prevent recurrence.
While vitamins are essential nutrients for the human body, they are not supplements to be taken indiscriminately in large quantities. Long-term use of these products should be avoided. Whether pharmaceuticals or health products, prolonged use can cause adverse effects to varying degrees. We encourage parents to prioritize scientific approaches to children's daily diets and choose safe, reasonable methods to supplement essential cod liver oil.
This concludes our discussion on the optimal timing and proper supplementation of cod liver oil. We trust you now have a clearer understanding. Finally, we sincerely wish you good health and happiness.