If you've had a post vaccine antibody test, which company did you use?

[boon]

For post vaccine antibody test to see if any antibodies following vaccination, what companies have ppl used?

My mum did one from testing for all. She found the result made her more anxious than before 🤦🏼‍♀️ She is CEV and her results showed some antibodies but it was at the lower end although not really low. Think it took about 48 hours to get her results.