What is colon cleansing?

Colon cleansing, colonic hydrotherapy, colonics — these terms all refer to the same complementary health practice. As a naturopath and ARCH-accredited colon hydrotherapist with over 25 years of clinical experience, I am often asked: what is colon cleansing, and does it actually work? This page explains exactly what it involves, what happens during a session with me at Phenomenal Colonics, and who it may be suitable for.

What is Colon Cleansing?

Colon cleansing is the gentle introduction of warm, filtered water into the large intestine — the colon — to soften and remove accumulated waste, gas, mucous, and other material that the body has not eliminated naturally. Unlike laxatives, which stimulate the bowel muscles chemically, colonic hydrotherapy works mechanically and gradually, using water and — in my sessions — individually blended organic herbal preparations to support the process.

The colon is the final section of the digestive tract, responsible for absorbing water and forming and eliminating waste. When it is congested, sluggish, or out of balance, the effects can extend well beyond the gut: bloating, fatigue, skin problems, brain fog, and reduced immune function are all commonly linked to poor bowel health. Colon cleansing supports the body’s natural elimination processes rather than replacing them.

Colonic hydrotherapy is a regulated complementary therapy in the UK. All practising colon hydrotherapists should hold registration with ARCH — the Association of Registered Colon Hydrotherapists, the only professional body for this therapy regulated by the government-backed CNHC. My CNHC registration number is CNHC04200.

What Happens During a Colon Cleansing Session?

Every session at Phenomenal Colonics begins with a consultation. I take time to understand your individual health history, digestive concerns, diet, and any medications or contraindications before we proceed. This is not a tick-box exercise — it genuinely shapes the session.

The colonic itself uses a small, single-use speculum which is gently inserted. Two tubes connect to it: one through which warm filtered water enters the colon, and one through which waste and gas exit via a closed, odourless drainage system. Everything is hygienic, discreet, and comfortable. You remain fully covered throughout in a freshly laundered gown.

The session typically follows these stages:

The first 10 to 15 minutes often focus on releasing gas, which can cause the most immediate discomfort for clients who arrive with a congested bowel. Water moves gently in and out, travelling progressively further into the colon as gas is cleared.

As the session continues, waste that has accumulated deeper in the large intestine begins to loosen. Some clients experience mild cramping at this stage — this is normal and passes quickly. I use strategically selected organic herbal preparations, introduced via the enema bucket alongside the main water flow, to ease cramps and facilitate movement.

Throughout the session I massage your abdomen through the gown to help shift stubborn material and support natural peristalsis — the wave-like muscular movement that propels waste through the digestive tract.

A full session lasts approximately one hour.

What We Use at Phenomenal Colonics

  • Filtered and purified water at body temperature
  • Single-use, disposable speculums and tubing
  • Demeter-certified organic herbal preparations, blended individually for each client
  • A beeswax, olive oil, and herb ointment for comfort

The herbal element is something I have developed and refined over 25 years of clinical practice. Different herbs serve different purposes — some support peristalsis, others target candida or parasites, others soothe inflammation. What I use for you depends on your consultation.

Who is Colon Cleansing Suitable For?

Colon cleansing can benefit a wide range of people, including those experiencing bloating, constipation, irregular bowel movements, fatigue, skin problems, and general digestive discomfort. It is also popular among clients who simply want to maintain good digestive health as part of a broader wellness routine.

It is not suitable for everyone. People with certain inflammatory bowel conditions, recent abdominal surgery, or specific health conditions should consult their GP before booking. Full details are covered on the colonic irrigation FAQs page.

Book a Colon Cleansing Session in North London

I practise at Balance On The Lane, 16 England’s Lane, Belsize Park, London NW3 4TG — five minutes’ walk from Belsize Park tube on the Northern line. Sessions start from £175.

Book your session today or call +44 (0)7982 831239. WhatsApp is welcome.

You may also find the colonic health benefits page useful before your first appointment.


This content is for informational purposes only and does not constitute medical advice. Always consult your GP before beginning any new health treatment.


About Marijke Vogel Marijke Vogel is an ARCH and CNHC-accredited colon hydrotherapist and naturopath with over 25 years of clinical experience, practising at Balance On The Lane, 16 England’s Lane, Belsize Park, London NW3 4TG. CNHC registration: CNHC04200.

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