Why we take cod liver oil

The alarm goes off, the sleepy children are woken up by mama, they crawl out of bed. Sleepiness moves into routine…beds are made, young bodies get dressed, hair is combed, lunches put in backpacks…

Amidst the morning flurry, a bottle of amber liquid comes out of the fridge.

This amber liquid will come out most mornings – from early fall, through the frigid white mornings of winter, and well into spring when the bears are past crawling out of their hiding places.

What is this amber liquid that mothers have been giving their kiddos for centuries?

Cod liver oil!

Let me tell you why we take cod liver oil.

Though there are many beneficial factors in cod liver, both studied and unstudied. In this post, I will focus on the fat-soluble vitamins A & D. Next to sunshine, high-quality cod liver oil is one of the best natural sources of both, in a form that is easy for the body to absorb and use. Cod liver oil is both food and medicine.

Cod liver oil is also one of the most important supplements in the GAPS Protocol, helpful for healing the digestive tract as well as the rest of the body. To heal naturally, check out more info on my GAPS Class by clicking here.

Why are Vitamin A & D so important?

Benefits of Vitamin A

Natural preformed vitamin A, consumed within a well-balanced diet, alongside vitamin D, is a strong immune system modulator and is a contributing factor to dopamine regulation, one of our main neurotransmitters.

Vitamin A also regulates the female sex hormone progesterone, providing mood and fertility benefits. It acts as an antioxidant and it is important for skin cell regeneration, i.e. smooth, healthy skin. Dr. Amen, author of Change your Brain, Change your Body says that “your skin is ‘brain on the outside’.

What does Vitamin A deficiency look like?

  • Zinc deficiency (zinc is important for the use of vitamin A)
  • Infections are more severe (Vitamin A is very important to the immune system, in fact, its earliest name was anti-infective vitamin)
  • Infections also draw heavily on vitamin A reserves
  • Deficiency in bile and pancreatic enzymes (lack of good fat metabolism)
  • Decreased growth rate
  • Poor bone development
  • Decreased likelihood of survival from a serious illness
  • Depression
  • Anxiety
  • Lack of future goal motivation (maybe due to lack of dopamine regulation)
  • Digestive disease (According to Dr. Natasha Campbell-McBride, author of the Gut and Psychology Syndrome, Vitamin A and digestive issues are a bit of a “chicken and egg” relationship, one leading to the other and so forth, because the gut lining is one of the most active sites of cell production, growth & differentiation…which needs a good supply of vitamin A)
  • Night blindness and xerophthalmia (rare in the West)

Sources for Vitamin A:

Vitamin A can be found in two main forms in foods – plant-based carotenes and animal-based retinol.

Due to digestive issues and lack of the right enzymes many people cannot convert plant-based carotenes to the correct and usable form. Cod liver oil contains vitamin A in its natural pre-formed biochemical shape.

The best way to get bio-available Vitamin A is from good quality cod liver oil. I recommend Rosita Extra Virgin Cod liver oil because of their high-quality processing methods, which is important for not destroying the nutrients that are inherently in the cod liver oil.

Sources of Vitamin A include:

  • cod liver oil
  • liver (and other organs from grass-fed animals)
  • fish (like cod & halibut)
  • egg yolks (from pastured chickens)
  • butter (from grass-fed dairy animals)
  • fish eggs (roe)

Vitamin D

Vitamin D has more than one name, like “sunshine vitamin”, but is actually not a vitamin at all. Rather it is a potent maintenance and repair steroid hormone. It is a neurosteroid and a powerful epigenetic influencer and is responsible for regulating over 2,000 genes in the body.

Vitamin D’s role in blood calcium levels plays a role in nerve transmission. Vitamin D is also important in preventing depression, mood disorders in general, and cognitive function.

Vitamin D taken in therapeutic amounts of 5,000 to 10,000 IU daily can dampen autoimmunity response. (Test your levels first and recheck in 4 – 6 weeks. Your level should be around 50 ng/mL).

**Synthetic D halts natural D conversion in the body, so it is important to get natural Vitamin D, such as from sunshine and Cod liver oil. Sunshine is the most efficient way to get vitamin D…unless your diet is full of unhealthy pro-inflammatory fats and sugar. When you have healthy fat stores and cholesterol, UV rays hit the skin and strike cholesterol molecules, changing them into a precursor for vitamin D that gets fully activated in the kidney and liver. The best form of D to intake is D3.

Vitamin D is critical to overall health and important for brain health.

What does Vitamin D deficiency look like?

  • Diabetes, as Vitamin D is essential for blood sugar control
  • Heart disease
  • Mental illness
  • Auto-immune illness, such as rheumatoid arthritis, lupus, inflammatory bowel disease, MS and others
  • Obesity
  • Osteoarthritis
  • Rickets and osteomalacia, because Vitamin D is so essential for bone health
  • Muscle weakness and poor neuromuscular coordination
  • High blood pressure
  • Cancer
  • Chronic pain
  • Poor immunity and susceptibility to infections
  • Hyperparathyroidism, which manifests itself as osteoporosis, kidney stones, depression, aches and pains, chronic fatigue, muscle weakness, and digestive abnormalities

It can be a good idea to test your vitamin D status.

What Vitamin D numbers are you looking for?

  • If you are deficient in the 25 hydroxy D3 (inactive) you will show less than 40 – 50 nanograms (ng) per milliliter (ml.)
  • If you are optimal you’ll show about 50 – 65 ng. per ml.
  • If you show a greater than 100 ng per ml. this is truly an excess of Vitamin D
  • Maintenance – 250 – 300 IU per day should be sufficient, for a person who is not deficient
  • Therapeutic ranges – Normal, healthy person can safely consume up to 3,000 IU for every 100 lbs.
  • Cancer or autoimmune patient – can consume up to 5,000 IU of Vitamin D per day
  • Higher doses for short periods of time are okay, but it is wise to monitor levels

At the right time of year, with the optimal conditions, you can manufacture up to 20,000 IU per day from sunshine.

  • If you have an acute situation like the flu, a viral infection, etc. you can treat with high amounts of Vitamin D – 1,000 IU per pound of body weight, for up to 3 days, no more than 4 days
  • For most adults this equals up to 100,000 to 200,000 IU per day, in a single dose, for 3 days
  • Do not do this for a person getting out in optimal sunshine

Best Sources for Vitamin D:

  • Sunshine (with optimum health and optimum sun exposure, up to 20,000 IU a day)
  • Cod liver oil (fermented & minimally processed is best, by far the most concentrated food source)
  • Fish (salmon, sardines, cod, shrimp)
  • Egg yolks (from pastured chickens)
  • Lard (from pigs on pasture/woods)

How our family takes cod liver oil:

Our family takes cod liver oil in two ways.

  1. With elderberry syrup (our girls’ preferred method)
  2. With beet kvass (the rest of the family’s preferred method).

We could take it straight and have indeed done so when needed, but it is much more pleasant to take it with something that cuts the taste!

General Dosing of Fermented Cod Liver Oil:

For dosing purposes, 1/2 tsp is equal to about 2.5 ml.

  • Children (3months-12yrs): 1/4 – 1/2 tsp (1.25 – 2.5ml)
  • Adults and Children 12+yrs: 1 tsp (5ml)
  • Pregnant/Nursing Women: 1 – 2 tsp (5 – 10ml)

What brands do I recommend?

I recommend either Rosita Extra Virgin Cod liver oil, or (for the more budget-conscious) NutraPro Virgin Cod liver oil, to all my clients and GAPS Class participants.

Cod liver oil

2 thoughts on “Why We Take Cod Liver Oil”

  1. Hello Mrs. Christner,

    Your site is quite informative, and i love your seemingly simple and relaxed appearance…
    After being ill with auto-immune disease for nearly 20 years: celiac, sjogren’s syndrome, chronic fatigue, candida, etc., i began the gaps diet about 16 months ago. i too was more impressed w/ dr. natasha than any other dr. or source of information since the onset of my symptoms. Unfortunately, i developed h-pylori twice during this time and finally had to take antibiotics. You can imagine the nightmare it has been…I have been trying to heal my gut and rid my body of yeast which i believe is my biggest problem, for several months now. Following the gaps protocol has not been enough to rid me of the candida. i am now off of all fruit and honey too, taking an anti-candida supp along with lots of probiotic foods(w/exception of dairy-cannot tolerate it), biocult, other probiotics and coc kefir. i have spent thousands of dollars on my health and am resorting to much prayer for healing as this has been a vicious cycle for sure and interfered with my relationship with my Triune God. i have been interested in NTP training, but since i am not yet healed from the yeast, i believe i should wait and continue to pray about it. Meanwhile, if you have any sure-fire methods to healing the body of yeast, i would be much obliged. Thank you for all you do to help people obtain good health. God bless! nancy

    1. Melanie Christner


      Thanks for your comments. I would look into your dental history, and whether you might have mercury amalgams or other heavy metal toxicity…as the body will keep yeast around to manage those toxins.

      Go for the NTP training, its a great program 🙂


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