Cod liver oil and vit d

[Geegee777]

I'm supplementing vit d3 with K2 and magnesium,

I'm starting high strength cod liver oil and would like to know if I could take them all together?

[humanbean]

Cod liver oil usually contains vitamin D. Bear that in mind if you also take Vitamin D in another supplement. Too much vitamin D can be toxic.

Cod liver oil usually contains vitamin A too, which is also toxic in overdose. You might want to take breaks from the cod liver oil every now and then.

[Geegee777 in reply to humanbean]

OK, thanks. I'm going to do a medichecks blood test first to check my levels, then start supplementing cod liver oil.

[userotc in reply to Geegee777]

Good practice to get blood tests done regularly to monitor progress/avoid toxicity. 1-3 times/yr is common when dosing vit D only.

[Geegee777 in reply to userotc]

Thanks, I'll post my results when done🌸🌸🌸🌸

[gabkad]

Since cod liver oil is really primarily a source of retinol (vitamin A) and not so much Vitamin D, you might want to get your Retinol level checked as well. The only smart thing my endo did was test for retinol. My level was excellent. But apparently there are many people whose vitamin A level is not.

There's nothing wrong with taking cod liver oil.

It contains 4,500 IU of vitamin A per teaspoon. We need 3,000 IU per day.

A lot of people, especially hypos, are low in vitamin A.

However, as a longterm treatment for vitamin D deficiency, you are better off

taking a vitamin D3 supplement in addition because cod liver oil contains only

450 IU vitamin D.

It is good source of omega 3 fatty acids. 890 mg.

Taking 1 teaspoon of cod liver oil once daily will not result in overdose or

toxicity. However, check your diet for sources of vitamin A and beta carotene

as per the information below.

academic.oup.com/ajcn/artic...

Provitamin A carotenoids are an important source of dietary vitamin A that are found primarily in dark-green leafy vegetables (DGLVs), such as spinach, and in orange and yellow vegetables and fruit, such as carrot, mango, and papaya.

Provitamin A carotenoids provide ≤30% of daily vitamin A intake in the United States, whereas animal products that contain preformed vitamin A, such as dairy products, egg yolk, and liver, provide ≥70% of daily vitamin A intake (1).

In contrast, in low-income populations in developing countries, dietary carotenoids provide ∼80% of daily vitamin A intake (2). This is an important difference because preformed dietary vitamin A is well absorbed by humans, whereas provitamin A carotenoids from plant sources are less well absorbed and need to be converted to vitamin A in human intestinal cells (3).

The vitamin A equivalency ratio for β-carotene to vitamin A is currently estimated as 12:1, by weight (12 μg β-carotene is equal to 1 μg retinol), for plant sources of β-carotene in a mixed diet.

The ratio is based on ∼17% absorption of β-carotene from a mixed diet (6 μg plant β-carotene = 1 μg pure β-carotene) and a conversion ratio to vitamin A of 2:1 (2 μg β-carotene = 1 μg retinol) (5). However, vitamin A equivalency ratios are highly variable for both pure β-carotene in oil and β-carotene from plant sources and can be affected by food- and diet-related factors and health, nutritional, and genetic characteristics of human populations.

pubmed.ncbi.nlm.nih.gov/847...

The conversion of beta-carotene (provitamin A) to 2 molecules of vitamin A (retinol) is accelerated by thyroxine and hyperthyroidism, respectively. The characteristic yellow tint of the skin in hypothyroidism is due to hyper-beta-carotenemia.

Pardon me but which is it? 2 beta carotenes make 1 retinol or 1 beta carotene makes 2 retinol?

The first is from The American Journal of Clinical Nutrition, an old reliable publication.

The second is from Acta Med Austriaca translated from German.

Who is right? Who is wrong? The both can't be right. SMH.

[Geegee777 in reply to gabkad]

Thank you, I'll keep retesting bloods and adjust accordingly 🌸🌸🌸🌸