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Type 1 and Type 2 Nutrients

This question was posted the Other thematic area forum area and has 5 replies.

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Normal user

23 Aug 2015, 12:09

I have been reading several articles on classification of nutrients as type 1 and type 2 based on how the body responds to their deficiencies. I am confused that all vitamins are considered type 1 nutrients which, under this classification, do not affect growth. Well we know that vitamin A regulates cell differentiation and thus growth. So, even if all type 2 nutrients were adequate, a deficiency in vitamin A should still be affecting growth. Also, it is not clear to me if this classification is taking into account nutrient-nutrient interactions. e.g. Zinc a type 2 nutrient interacts with Vitamin A. Thanks

Tamsin Walters

en-net moderator

Forum moderator

24 Aug 2015, 13:20

From Craig: It's true that ultimately Vitamin deficiency will affect growth but the primary sign of deficiency is not reduced growth but maybe night blindness ( Vitamin A). That's my own understanding.

Mark Myatt

Consultamt Epidemiologist

Frequent user

24 Aug 2015, 13:57

Vitamin A deficits will manifest themselves quite early with "eye signs" (night blindness, Bitot spots, and the like). These are early and specific signs of VA efficiency. Increase susceptibility to infection and increase duration of symptoms associated with VA deficiency will probably affect growth earlier and more profoundly than VA deficiency alone (i.e. in the absence of infection). I believe that Mike Golden originated the type 1 / type 2 nutrient model. He often responds on this forum. Perhaps EN-NET staff will prompt him.



Normal user

25 Aug 2015, 06:33

Thanks for replying. I was also thinking that the term/wording "the body's initial response to a nutrient(s) deficiency" would perhaps be more appropriate to use in this case. Thanks and regards

Dr Ashley Berry


Normal user

25 May 2018, 00:45

In fact, Dr Mel Sydney-Smith, Brisbane, has been teaching integrative medicine for over 30 years, and quotes from The Oxford Textbook of Medicine on the differences between Type 1 and 2 nutrient deficiency. With the latter, all the items need to be provided in the correct amount and ratio, otherwise the body actually shrinks and the patient develops symptoms of anorexia, fatigue and cognitive difficulties.

Laurie Sauerwein

Normal user

1 Oct 2018, 05:06

These classifications may be somewhat helpful, but deficiencies are not as clearcut as typing makes them sound. There are crossovers and physiological interactions that frustrate classification. Zinc deficiency is one. There are physical signs of zinc deficiency in the form of alopecia, dermatitis, diarrhea, night blindness that may appear before anthropometrics demostrate growth delay.

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