What kind of disease should not take cod liver oil? Contraindications and precautions for cod liver oil
Cod liver oil is often used to supplement nutrition, protect eyesight or enhance immunity because it is rich in vitamins A, D and Omega-3 fatty acids. However, not everyone is suitable for taking cod liver oil, and patients with certain medical conditions should be cautious or avoid its use. The following are the taboo topics related to cod liver oil that have been hotly discussed on the Internet in the past 10 days, organized into structured data based on medical advice.
1. What diseases should patients not take cod liver oil?
| disease type | Reasons for taboos | Alternative suggestions |
|---|---|---|
| hypercalcemia | The vitamin D in cod liver oil promotes calcium absorption and aggravates blood calcium levels | Talk to your doctor about choosing vitamin D-free supplements |
| Liver insufficiency | Vitamin A requires liver metabolism, which may increase the burden on the liver | Switch to water-soluble vitamin supplements |
| Hyperthyroidism | Excess vitamin A may interfere with thyroid hormone synthesis | Prioritize food supplements (such as deep-sea fish) |
| chronic kidney disease | Accumulation of vitamin A may lead to risk of toxicity | Strictly follow doctor’s instructions to control dosage |
| Allergies (fish allergy) | May cause allergic reactions | Choose plant-sourced Omega-3s |
2. Interactions between cod liver oil and other drugs
| drug type | interaction | risk level |
|---|---|---|
| Anticoagulants (warfarin, etc.) | Cod liver oil may enhance anticoagulant effects and increase bleeding risk | high risk |
| Retinoids | Superimposed vitamin A intake may lead to poisoning | medium to high risk |
| Diuretics (thiazides) | May increase blood calcium levels | medium risk |
| birth control pills | Long-term combined use may increase vitamin A accumulation | low risk |
3. Precautions for special groups of people
1.pregnant woman: Daily vitamin A intake needs to be controlled below 3000IU. Excessive intake may cause fetal malformations. It is recommended to choose nutritional supplements designed specifically for pregnant women.
2.infants: It is necessary to strictly follow the dosage recommended by the pediatrician to avoid excessive vitamin A/D poisoning.
3.elderly: Metabolic capacity is reduced. It is recommended to give priority to obtaining nutrients through meals and reduce the dosage by half if necessary.
4. How to take cod liver oil safely?
1.View ingredient list: Pay attention to the specific content of vitamin A/D and avoid choosing ultra-high concentration products.
2.Control dose: It is recommended that daily vitamin A for ordinary adults should not exceed 2500-3000IU, and vitamin D should not exceed 400-800IU.
3.Regular testing: Long-term users should check blood calcium, liver function and vitamin levels every 6 months.
4.Pay attention to save: Cod liver oil is prone to oxidation and deterioration. It needs to be refrigerated after opening and used within 3 months.
5. Expert advice
Recently, many medical institutions mentioned in health science popularization that cod liver oil is not a "universal health product" and its applicability varies from person to person. Director of the Nutrition Department of Peking Union Medical College Hospital pointed out: "For patients with chronic diseases, it is recommended to conduct a nutritional assessment before deciding whether to supplement cod liver oil. Blind use may be counterproductive."
Summary: Although cod liver oil is beneficial, it should be strictly avoided by patients with hypercalcemia, liver disease, hyperthyroidism, etc. You should consult your doctor before taking it and monitor your body indicators regularly to ensure safe and effective nutritional supplementation.
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