Modified Citrus Pectin in the UK: What It Is, How People Take It & How to Choose

Jul 21, 2026

8 min read

0 Comments

Modified citrus pectin (often shortened to MCP) is a specialised supplement ingredient that tends to be discussed with a lot of technical language and, sometimes, some big promises. This guide keeps it simple and honest: what MCP is, how it's used, which claims are actually allowed, and how to choose a quality product in the UK.

Let's be upfront. In the UK, modified citrus pectin is sold as a food supplement — not a medicine. Food supplements cannot legally claim to treat, prevent or cure any condition, and MCP itself has no authorised health claim. So we won't tell you what MCP "does". Where a formula contains a nutrient that does carry an authorised claim — here, the added vitamin C and selenium — we'll point it out.

What is modified citrus pectin?

Pectin is a natural fibre found in the peel and pulp of citrus fruit. Modified citrus pectin has been processed to reduce the size of the molecules (a "low molecular weight" pectin), which is the form used in supplements. Ours is standardised to a low molecular weight (under 15 kDa) and around 90% galacturonic acid.

What's in our formula — and the authorised claims

Each 2-capsule serving pairs 1500 mg of modified citrus pectin with two nutrients that carry authorised claims:

Vitamin C

75mg · 94% NRV

normal immune function; protection of cells from oxidative stress

Selenium

50µg · 91% NRV

normal immune function; protection of cells from oxidative stress; normal thyroid function

These claims belong to vitamin C and selenium — not to MCP — but they're a genuine, label-checkable part of the formula.

How people take MCP

General information only — follow your product's label. MCP is typically taken daily, often away from meals and other supplements (as a fibre-type ingredient it can bind to some things); ours is a two-capsule serving. Drink plenty of water alongside it.

Safety & who should be cautious

Check first if relevant. If you take medication, MCP is best taken well apart from it (a couple of hours), as fibre-type ingredients can affect absorption. If you're pregnant, breastfeeding or managing a health condition, speak to your GP or pharmacist first.

How to choose a quality MCP supplement

Low molecular weight. The specification that matters is a genuinely low molecular weight pectin — the label should state it.
Strength per serving and any added nutrients (and their %NRV).
Third-party testing with a Certificate of Analysis available.
Clean label, full disclosure, GMP manufacture, reputable UK seller — and no dramatic health claims.

Humming Herbs Modified Citrus Pectin

A 3-in-1 pairing 1500 mg of low-molecular-weight modified citrus pectin with vitamin C and selenium — both of which contribute to the normal function of the immune system and the protection of cells from oxidative stress. Third-party tested; full Supplement Facts on the product page.

References & further reading

Great Britain Nutrition and Health Claims (NHC) Register — the authorised claims for vitamin C and selenium.
PubMed — research on modified citrus pectin (background reading; not a substantiation of any health claim).

Important: This article is for general information only and is not medical advice. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle, and are not intended to diagnose, treat, cure or prevent any disease. If you are pregnant, breastfeeding, taking medication or managing a health condition, speak to your GP or pharmacist before taking any new supplement. Keep out of reach of children.