Health Guide


What is it?

MCP is an abbreviation for Modified Citrus Pectin, which is used as a supplement for the treatment of cancer and to increase immune function.

Other names for MCP include: Modified Citrus Pectin.

Ask your doctor, nurse, or pharmacist if you need more information about this medicine or if any information in this leaflet concerns you.

Before Using:

Tell your doctor if you

  • are taking medicine or are allergic to any medicine (prescription or over-the-counter (OTC) or dietary supplement)
  • are pregnant or plan to become pregnant while using this medicine
  • are breastfeeding
  • have any other health problems, such as high blood pressure or heart or blood vessel disease


Talk with your caregiver about how much MCP you should take. The amount depends on the strength of the medicine and the reason you are taking MCP. If you are using this medicine without instructions from your caregiver, follow the directions on the medicine bottle. Do not take more medicine or take it more often than the directions tell you to.

To store this medicine:

Keep all medicine locked up and away from children. Store medicine away from heat and direct light. Do not store your medicine in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down and not work the way it should work. Throw away medicine that is out of date or that you do not need. Never share your medicine with others.


  • Before taking MCP, tell your doctor if you are pregnant or breastfeeding

Side Effects:

Stop taking your medicine right away and talk to your doctor if you have any of the following side effects. Your medicine may be causing these symptoms which may mean you are allergic to it.

  • Breathing problems or tightness in your throat or chest
  • Chest pain
  • Skin hives, rash, or itchy or swollen skin

Other Side Effects:

You may have the following side effects, but this medicine may also cause other side effects. Tell your doctor if you have side effects that you think are caused by this medicine.

  • Occasional upset stomach has been reported with large amounts (1)


1. Eliaz Isaac: The role of modified citrus pectin in the prevention of cancer metastasis. Towsend letter 1999;192:64-66.

2. Hsieh TC & Wu JM: Changes in cell growth, cyclin/kinase, endogenous phosphoproteins and nm23 gene expression in human prostatic JCA-1 cells treated with modified citrus pectin. Biochem Mol Biol Int 1995; 37(5):833-841.

3. Inohara H & Raz A: Effects of Natural Complex Carbohydrate (Citrus Pectin) on Murine Melanoma Cell Properties Related to Galectin-3 Functions. Glycocong J 1994; 11(6):527-532.

4. Pienta KJ, Naik H, Akhatar A et al: Inhibition of Spontaneous Metastasis in a Rat Prostate Cancer Model by Oral Administration of Modified Citrus Pectin. J Natl Cancer Inst 1995; 87(5):348-353.

5. Platt D & Raz A: Modulation of the Lung Colonization of B16-F1 Melanoma Cells by Citrus Pectin. J Natl Cancer Inst 1992; 84(6):438-442.

6. Zhu HG, Zollner TM, Klein-Franke A et al: Activation of human moncyte/macrophage cytotocicty by IL-2/IFN gamma is linked to increased expression of an antitumor receptor with specificity for acetylated mannose. Immunol Lett 1993; 38(2):111-119.

7. Zollner TM, Zhu HG & Anderer FA: Induction of NK-like activity in T cells by IL-2/anti-CD3 is linked to expression of a new antitumor receptor with specificity for acetylated mannose. Anticancer Res 1993; 13(4):923-930.

Last Updated: 7/4/2018
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