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Vitamin C

Vitamin C is an essential nutrient for humans. It is a cofactor in at least eight enzymatic reactions, including several collagen synthesis reactions that are important in wound-healing and in preventing bleeding from capillaries. Vitamin C also acts as an antioxidant against oxidative stress.

Unlike many other animals, humans are unable to make Vitamin C from glucose because of their lack of one vital enzyme. Thus, humans must ingest Vitamin C – this is why it is called essential.


Vitamin C is an important antioxidant, and of particular importance is its antioxidant function with lipids (fats). The LDL (or “bad”) cholesterol is protected from free radical damage by Vitamin C. It helps to form strong connective tissue, repair wounds, improve gum health, and reduce bruising.

Vitamin C is able to regenerate Vitamin E.


Good food sources for Vitamin C include Acerola cherries, Seabuckthorn, Rose hip, red chili peppers, green peppers, guavas, papaya, oranges, cantaloupe, kiwi fruit, broccoli, cauliflower, Brussels sprouts, grapefruit, and strawberries. Fresh foods eaten immediately after harvest are the richest sources as the content declines rapidcly in foods once they have been picked or sliced.

Therapeutic uses

Scruvy is a deficiency disease associated with lack of Vitamin C. Fatigue is one of the first deficiency signs of Vitamin C. Other signs include bleeding gums, haemorrhages under the tongue, impaired wound healing, joint pains, loose teeth, easy bruising, frequent infections, and cardiovascular disease.

Vitamin C can support the immune system by enhancing the activity of the white blood cells and production of immune-mediating chemicals. When the body is under a lot of stress, both emotional and physical, vitamin C may be excessively excreted (and found in urine samples) and greater intake may be necessary.

Because vitamin C can regenerate vitamin E, it is important to include it in any therapeutic antioxidant combination.

Many clinicians have seen benefits using doses from 1000 to 20,000 mg daily.

Safety and toxicity

Vitamin C is considered extremely safe. However individuals with glucose-6-phosphate dehydrogenase deficiency have been shown red blood cell destruction when large doses of Vitamin C were given intravenously.

Patients who are homozygous for haemochromatosis may experience increased iron uptake with vitamin C ingestion.

Several reviews raised no concerns that Vitamin C can cause kidney stones.

All excess vitamin C is disposed of through the urinary system.

Functional medicine considerations

Vitamin C insufficiency should be suspected when a patient is fatigued, especially if they show echymosis (bruises) or petechiae (caused by a minor bleed).

Source: Clinical Nutrition – A functional approach
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The LNT Coca Pulse Test for Food Sensitivities

I found this test in an email from Lauren Geertsen, NTP. It could be a useful pre-test for the ImuPro 300.

“LNT” stands for Neuro-Lingual Testing, which utilizes the communication pathways between the mouth and the central nervous system. Simply tasting a food sends messages throughout the body, and the body will communicate through a quickened pulse if this food is not ideal for you.

This verion of the pulse test allows you specifically test one food at a time and immediately learn if the food is beneficial or stressful to your body. It is like the instant-gratification method of Dr. Coca’s original test.

Food Sensitivity Testing with the LNT Coca Pulse Test

  • Do this test 1-2 hours after eating or drinking anything. Start when you are mentally, emotionally and physically relaxed. Always take your pulse for one full minute… don’t take it for 30 seconds and multiply it by two.
  •  While sitting, take a deep breath and slowly exhale. Take your pulse by counting how many times your heart beats in one exact minute. It may be easiest to feel your pulse by placing two fingers on the upper right side of your neck. Record this pulse rate.
  • Next, put a piece of the food in question in your mouth. It is okay to chew, but don’t swallow. Taste the food for at least 30 seconds. Then, take your pulse again for a full minute with the food in your mouth. Spit out the food and rinse your mouth with filtered water. If the pulse rate rises 6 or more points with a food, it indicates a stress reaction and that food should be avoided. Remember, food sensitivities can heal through diet and lifestyle changes, so it will be possible to re-test and reintroduce these foods after a period of healing.
  • Let the pulse return to the baseline before testing with a different food.

NOTE: If testing eggs, test the egg yolk and the egg white separately. Egg yolks are often better tolerated than egg whites.

If you test positive for some foods it might well be beneficial to confirm this with a formal IgG food intolerance test like the ImuPro 300, available from us.

Healthy regards,

Dr Oliver Frey


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Methylation, Neurotransmitters and Mental Health

Many dozens of neurotransmitters have so far been identified in the human brain. They are associated with specific mental disorders including:

  • depression: serotonin
  • schizophrenia: dopamine, glutamate, serotonin
  • anxiety: norephinedrine, GABA
  • Parkinson’s disease: dopamine

Good mental health requires proper neurotransmitter activity. Methylation is one of the key mechanisms to switch “off” genes that produce neurotransmitter transporters. Undermethylated persons have reduced serotonin activity and a tendency for depression, whilst overmethylated persons have a tendency for anxiety and schizophrenia.

Nutrient therapy can adjust methylation and can produce major benefits for these patients.

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