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What Impacts ALCAT Results?

Hi Cynthia – How can you make sure to have the most accurate ALCAT results? Is it recommended that you fast, or have eaten? Would you have better results if you did the test after completing a cleanse or detox? Thanks Kimberly

Hi Kimberly, the only restrictions for the ALCAT test are that you must refrain from taking anti-histamines, anti-inflammatories and  high doses of vitamin C for 48 hours prior to testing. Each of these items will influence your results and you won’t have accurate data.

If you have been taking a steroid like prednisone every day for a long time, then it isn’t a problem. The body adjusts and it becomes part of your physiology. It won’t affect the test. However if you’ve taken a short course of a high level of a steroid like 20 or 40 mg, then it is recommended to wait a week before testing.

It is crucial that the instructions for packing and shipping the blood draw are followed explicitly, as this will affect results and can cause a need for another draw. The blood sample must be packed with the ice pack that is included and it must be sent to the lab the same day the blood is drawn. The sample must be received at the lab the next day.

Other than that, no special instructions must be followed. No need for fasting, cleansing, detoxing or changing the diet — it will have no impact on the results.


6 thoughts on “What Impacts ALCAT Results?”

  1. Will ALCAT results be accurate if you haven’t had a food for a long time? Example – I’ve been eating gluten free for a year. Will it be accurate for gluten or should I add it back in to get an accurate result?

    1. Admin - Cynthia Perkins

      Yes, it will be accurate if you haven’t eaten the food. ALCAT is not exposure dependent like traditional IgG testing.
      However, ALCAT is not the strongest test for gluten. Some false negatives do occur for gluten. Gluten is best tested for with traditional gluten testing.

  2. Hi,
    I found this when I googled ALCAT. What is considered a high dose of vitamin C? I may have taken 1000 mg of vitamin C the day before I got tested, but I can’t remember. My practitioner did not inform me that it could affect the test. Thanks!

    1. Admin - Cynthia Perkins

      Hi Kira,

      Well, it’s really best if no dose of vitamin C is taken. 1000 mg is kind of high.


  3. Hi Cynthia,
    I noticed you said that N-SAIDS will taint ALCAT results. There is nothing on the ALCAT website that I could find that confirmed this. I’m very interested b/c I had the ALCAT and have over 80 food sensitivities according to my results. I would really appreciate any clarification you can give on that.

    1. Admin - Cynthia Perkins

      Hi Caryn,

      The information I provided on what substances should be avoided are the instructions that were given to me directly from ALCAT.


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