Blue Poop Service Terms

Effective: 12th May 2021

The Blue Poop Service is a free service that aims to provide you with insights and other information about your gut, diet and health. It will kick off with the results of our analysis of your quiz and gut transit time and then be followed up with further emails about gut, diet and health. You may unsubscribe from the emails at any time.

This page explains the terms on which we make the service available.

The service is intended to be fun with no obligation on your part or ours - in other words, no legally binding contract between us - unless you buy a blue muffin test kit from us (see below under “buying blue muffin test kit”). In particular:

  • Although we hope you will be able to access your results from completing the challenge and that you will find them interesting, we cannot guarantee that this will be the case. 
  • You will not be paid or otherwise rewarded for your participation, nor have any right to share in any profit we may make as a result of using the information you provide.
  • You do not have to purchase muffins to take part, you are welcome to bake your own blue muffins according to the recipe we provide.

You must be at least 18 years old to participate.

Important: our results are based on statistical inferences derived from the information you give us. They are not intended to be health or medical advice.

Availability of the service: we hope to keep the service running for some time and have no plans to shut it down in the near future, but there may come a time when we have to retire it.

Privacy: To learn about what we do with the information you enter into the challenge, please see our privacy policy.

Limitation of liability: for the reasons we explained above, anything we do as part of the challenge (apart from the supply of muffins) is on an “as is basis”. Please see our standard disclaimer. We also exclude any liability to you for our service. Please see our standard limitation of liability.

Buying a blue muffin test kit

If you live in the Continental United States, other than in Alaska, you may order a blue muffin test kitour blue muffins. Orders are for 2 sets of 2 muffins for a price of $2.99 plus $3.99 for shipping and any additional local taxes. The total price will be calculated and displayed for you at checkout.

NB: Allergies

If you think you may be allergic to anything, it would be safest for you to bake your own muffins. We cannot guarantee that trace quantities of material to which you might react are present in any muffins we supply.

Cancellations and refunds

All sales are final and may not be cancelled unless your order has not been prepared yet. Preparation typically occurs within 24-48 hours after order completion, although it may happen sooner. Except where you cancel your order before we have prepared your order, all sales are non-refundable. 

In exceptional circumstances, for example if you submit an order but are then told by your physician that you should not participate, ZOE may, in its absolute discretion, refund some or all of the fees you have paid. Any requests for a refund should be made to

If a blue muffin test kit is damaged or defective when you received it, ZOE will, on request, ship a replacement free of charge, provided that the test kit has not expired and subject to availability of a replacement, and provided  the damage or defect was not your fault (for example, because you gave an incorrect address). If we do not have a replacement blue muffin test kit to ship to you, we will refund the price you paid.

General terms of sale

The terms on which we sell our blue muffin test kit (other than the price and cancellation policy) are the same as for our general nutrition service, which you can find here.