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This Rainbow Returns Policy along with the  Rainbow Customer Terms govern your order, and our performance, of the services we make available from (the “Site”), a website operated by Rainbow Diagnostics Ltd (“we”/“us”/“our”).


You acknowledge and agree that the Services (as described below) are not a substitute for emergency medical services, actual medical diagnosis or consultation with a doctor, and that the information contained in the Report does not constitute medical advice and/or recommendations for medical treatment and you will not rely on it as such.


  1. We are a company registered in England and Wales. Our company registration number is 09828160 and our registered office address is: Rainbow Diagnostics Ltd, 86 Harley Street, London, W1G 7HP. 
  2. You may contact us by using this email address:
  3. If we need to contact you, we will do so by writing to you at the email address you provided to us in your order.


4. We may revise these Rainbow Returns Policy from time to time in our sole discretion. The version of the Rainbow Returns Policy which exists at the time you place your order will be the terms which govern the Services contract. Please check this page before you submit an order for Services, as this version may be different from the version(s) which applied to previous order(s) for Services you submitted.  

5. Rainbow’s Services are not available to customers in locations outside the United Kingdom. Customers access our Site and the Services on their own initiative and are responsible for compliance with local laws.


6. The services which you are ordering consist of:

(a) Delivery of a blood sample kit (“Kit”);

(b) Blood testing which is carried out by us (as further detailed in clause 8); and

(c)Preparation of a report containing general healthcare and lifestyle advice relating to the type of blood testing carried (“Report”) produced by an external doctor (as further detailed in clause 9) which will be presented to you via email.

 (the “Services”).


You have the right to cancel the Services contract in the following scenarios and subject to the conditions in the Rainbow Customer Terms:

(a)If you have changed your mind about the Services. See clauses 7 – 10 for more information here; and

(b)If the Services are performed late or in breach of our Terms and Conditions, you may have a legal right to get the Service re-performed or to end the contract and get some or all of your money back. See our Terms and Conditions for more information.

Exercising the right to change your mind

7. Subject to clause 8, you will have no right to cancel the Services contract and receive a refund if we have processed your sample and/or made available the Report via email, even if the email did not reach you due to technological errors on email servers,  within 14 days of the day after we have accepted your order pursuant to our Terms and Conditions; as we, the Laboratory and the Doctor would have fully performed the Services contract as it relates to your order. This provision will apply in a similar manner to each subsequent re-test that you request and order we accept.

8. If you have a right to cancel the Services contract and wish to do so, you must email us at with details of your order (including the date it was accepted, your name and any order reference number we provided to you) and a clear statement that you wish to cancel your Services contract, in either case before the expiry of the 14 day period referred to in clause 7. For subscription Customers you can cancel your Services contract at any time by emailing us.

9. If you cancel a Services contract within this 14 day period, you will (subject to any deduction permitted by law – as detailed in clause 10 below) receive a refund for the money paid by you for the Service contract less the cost of the kit which is £20. The refund will be made as soon as reasonably possible, but not later than 14 days after the date on which we were informed about your decision to cancel the Services contract. We will reimburse you using the same means of payment as you used for the initial transaction, unless you expressly agree otherwise.

10. We reserve the right to deduct the following reasonable amounts which we consider to be in proportion to what Services have been performed up until the point you communicate cancellation to us:

(a) If you have not sent your blood sample to the Laboratory for testing, we will refund you the relevant Service price less £20.00. The £20.00 is used to cover the costs of the Kit and postage. The kit can be disposed of by recycling the card and placing the rest in general waste.

 All other circumstances will be assessed on a case by case basis. In any event, you will not incur any fees as a result of the reimbursement.

We have done something wrong

11. Apart from your cancellation rights above:

(a) if you inform us and can demonstrate that the Kit received is within reason damaged or defective, you will be entitled to a replacement or, where we are unable to send you a replacement Kit within a reasonable time, a refund of the relevant Service price; and

(b)if the Service is not otherwise carried out to the standard outlined at clause 11, you can require repeat performance or, where we, the Laboratory or the Doctor are unable to perform the repeat Services within a reasonable time, a refund of an appropriate amount.


12. We may end the Services contract at any time by written notice to you if:

(a) you do not, within a reasonable time of us asking for it, provide us with information that is necessary for us, the Laboratory and the Doctor to provide the Services;

(b) you do not, within a reasonable time, allow the Laboratory to deliver the Kit to you; or

(c) you do not, within the time period referred to in clause 22, send your blood sample to the Laboratory. 

13. If we end the Services contract in circumstances set out in clause 36, we will refund any money you have paid in advance for Services That have not been provided, but we may at our sole discretion deduct or charge you a reasonable amount as compensation for costs we, the Laboratory and/or the Doctor have incurred or will incur as a result of ending the Services contract, including any extra work that is required as a result of the circumstances set out in clause 36.

14. Third Party Rights: The Services contract is between you and us. No other person shall have any rights to enforce any of its terms.

15. Governing Law/ Jurisdiction: The Rainbow Customer Terms are governed by English law and you or we can bring legal proceedings in respect of the Services in the English courts. If you live in Scotland you or we can bring legal proceedings in respect of the Services in either the Scottish or the English courts. Similarly, if you live in Northern Ireland, you can bring legal proceedings in respect of the Services in either the Northern Irish or the English courts.

16. Online Dispute Resolution: If you are not happy with how we have handled a complaint in relation to the Services, you may submit a dispute for online resolution to the European Commission Online Dispute Resolution platform. You can find this platform and more information about it here:




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Important Safety Information

Take any medicines called nitrates, often prescribed for chest pain, or guanylate cyclase stimulators like Adempas (riociguat) for pulmonary hypertension. Your blood pressure could drop to an unsafe level are allergic to Tadalafil or any of the ingredients in Tadalafil

Discuss your health with your doctor to ensure that you are healthy enough for sex. If you experience chest pain, dizziness, or nausea during sex, seek immediate medical help

Tadalafil can cause serious side effects. Rarely reported side effects include:

an erection that will not go away (priapism). If you have an erection that lasts more than 4 hours, get medical help right away. If it is not treated right away, priapism can permanently damage your penis

sudden vision loss in one or both eyes. Sudden vision loss in one or both eyes can be a sign of a serious eye problem called non-arteritic anterior ischemic optic neuropathy (NAION). Stop taking Tadalafil and call your healthcare provider right away if you have any sudden vision loss

sudden hearing decrease or hearing loss. Some people may also have ringing in their ears (tinnitus) or dizziness. If you have these symptoms, stop taking Tadalafil and contact a doctor right away

Before you take Tadalafil, tell your healthcare provider if you:

have or have had heart problems such as a heart attack, irregular heartbeat, angina, chest pain, narrowing of the aortic valve, or heart failure

have had heart surgery within the last 6 months

have pulmonary hypertension

have had a stroke

have low blood pressure, or high blood pressure that is not controlled

have a deformed penis shape

have had an erection that lasted for more than 4 hours

have problems with your blood cells such as sickle cell anemia, multiple myeloma, or leukemia

have retinitis pigmentosa, a rare genetic (runs in families) eye disease

have ever had severe vision loss, including an eye problem called NAION

have bleeding problems

have or have had stomach ulcers

have liver problems

have kidney problems or are having kidney dialysis have any other medical conditions

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

Tadalafil may affect the way other medicines work, and other medicines may affect the way Tadalafil works, causing side effects. Especially tell your healthcare provider if you take any of the following:

medicines called nitrates

medicines called guanylate cyclase stimulators such as Adempas (riociguat)

medicines called alpha-blockers such as Hytrin (terazosin HCl), Flomax (tamsulosin HCl), Cardura (doxazosin mesylate), Minipress (prazosin HCl), Uroxatral (alfuzosin HCl), Jalyn (dutasteride and tamsulosin HCl), or Rapaflo (silodosin). Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. In some patients, the use of Tadalafil with alpha-blockers can lead to a drop in blood pressure or to fainting medicines called HIV protease inhibitors, such as ritonavir (Norvir), indinavir sulfate (Crixivan), saquinavir (Fortovase or Invirase), or atazanavir sulfate (Reyataz)

some types of oral antifungal medicines, such as ketoconazole (Nizoral) and itraconazole (Sporanox)

some types of antibiotics, such as clarithromycin (Biaxin), telithromycin (Ketek), or erythromycin

other medicines that treat high blood pressure

other medicines or treatments for ED

Tadalafil should not be used with REVATIO or with other PAH treatments containing PDE5 inhibitors.

Tadalafil does not protect against sexually transmitted diseases, including HIV.

The most common side effects of Tadalafil: headache; flushing; upset stomach; abnormal vision, such as changes in color vision (such as having a blue color tinge) and blurred vision; stuffy or runny nose; back pain; muscle pain; nausea; dizziness; rash.