It is generally recommended that you do not eat or drink for at least 30 minutes before a covid test. This is to ensure that your results are accurate. Food and drink can interfere with the accuracy of the test.
Covid tests work by taking a sample of your saliva or blood. The test looks for pieces of the virus’s genetic material. If you have food or drink in your mouth, it can contaminate the sample and make it harder to get accurate results.
It is also important to stay hydrated before your test. Dehydration can make it difficult to produce enough saliva for the test. It is recommended that you drink plenty of water in the hours leading up to your test.
If you are fasting for religious reasons, you should speak to a healthcare provider about your options. You may be able to arrange for a modified test that does not require fasting.