A natural higher strength blend of Rhubarb, Cayenne, Ginger and Aloe powder for maximum results. The strongest Rhubarb Complex® available.

The Award Winning Rhubarb Complex® is now available in this maximum strength version for those who have stubborn and persistent digestive complaints. This bespoke high strength blend used to only be reserved for our clinic, but owing to huge popularity and demand we have decided to share this with our online customers and give everyone the opportunity to reap the benefits.


Proudly Made In The UK

Testimonials & Reviews - The views expressed above are the opinion of Twenty First Century Herbs customers. Twenty First Century Herbs does not endorse these views, nor should they be regarded as health claims or medical advice.

How do I take it?

It’s easy, our max strength has been designed so that you only need to take 1 - 2 capsules per day, preferably just before your evening meal/snack. This has been designed so that it can also be combined with our original formula.

Is this safe to take long term?

Yes, our formula is designed to be taken during everyday life and can provide natural constipation relief, together with a gentle daily detox to help rid the body of impurities. All our customers, including ourselves, take Rhubarb Complex whilst working, socialising or travelling without any problems whatsoever.

Is Rhubarb Complex just a laxative?

No! Rhubarb Complex is NOT a laxative, it is an award winning digestive formula based on 85 years of clinical experience. Rhubarb Complex is designed to effectively address digestive issues, gently regulating the bowels and detoxing your body.  

Can I take it alongside any medication?

Yes, there are no contraindications with any medication.

Can I take more than 1 - 2 capsules?

There's no need to, our Rhubarb Complex - Max Strength has been designed so that 1- 2 capsules daily suits all! This product can safely be taken 365 days a year as your daily digestive formula.

Are the supplements Vegan & Vegetarian friendly?

Yes, all our products are vegan and vegetarian friendly. Our ingredients are 100% natural and have been handpicked by leading herbalists, based on 85 years of expertise.

Are the capsules Gluten Free?

Yes, Rhubarb Complex is 100% Gluten Free.

Is Rhubarb Complex Dairy Free?

It most certainly is, we pride ourselves on Rhubarb Complex being dairy-free!

I'm pregnant/lactating. Can I still take Rhubarb Complex?

We would encourage you to consult with a medical practitioner before taking Rhubarb Complex.

What if I have questions whilst taking it?

We pride ourselves on working with our customers every step of the way. We don’t just leave you once you have bought the product. We are always available via phone, email or our online chat if you have any questions.

Do I need to follow a specific diet whilst on the Rhubarb Complex?

We don’t advocate a strict diet whilst on the complex, as our products are designed to allow people to survive the 21st Century where toxins are unavoidable. However, for optimum results, we would say to avoid processed foods where possible and also to watch your intake of wheat and yeast as we find these to be the main culprits of digestive complaints.

I struggle to take capsules, does this come in any other form?

Rhubarb Complex is only available in capsule form, however, the capsules can easily be pulled apart and the contents can be mixed with food or juice and the results will be unaffected.

Concentrated Rhubarb Extract

Concentrated Zingiber Officinale Extract

Concentrated Capsicum Annum Extract

Concentrated Aloe Extract