If I collect blood under the 400 line is that enough?

We require at least 400µl of blood sample to be able to process and test your sample. Any less and we cannot guarantee the sample can be tested. For kits that include tests for HIV, syphilis, Hepatitis B and Hepatitis C we require 600µl of blood (600 line on the blood tube).

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Sexual Health London offers a free STI testing across most of London.
Simply register with SHL and complete an online consultation to order your free STI test kit.