A new service that includes vitamin B12 & vitamin D blood testing.

Viapath Nutris provides you access to the most comprehensive, definitive, state of the art nutritional blood tests in pathology.

See Our Tests

A new way of getting tested

Viapath Nutris is a pathology to patient service delivered by Viapath laboratories at Guy’s and St Thomas’ NHS Foundation Trust.

Many of our test panels are exclusive to Viapath Nutris and are not available elsewhere in Healthcare.

FAQs >

Our test panel focus

Vitamin B12: Viapath Nutris offers a comprehensive approach to vitamin B12 status testing that is not routinely available from other laboratories. Symptoms of vitamin B12 deficiency can include weakness, tiredness, light headedness, heart palpitations, muscle weakness and problems such as depression and memory loss. Vitamin B12 deficiency can affect anyone, but is more common in those who are vegan, vegetarian or suffering from conditions such as pernicious anaemia, Crohn’s disease or colitis. Vitamin B12 deficiency is also common in the elderly. Our Nutris Aquasorb package includes a novel overall vitamin B12 wellbeing measure known as the Fedosov Factor. If you would like to check your vitamin B12 status, are suffering from low vitamin B12 symptoms such as fatigue, weakness, memory loss or are a vegan or vegetarian concerned about vitamin B12 our unique deficiency tests are for you.

Fat-soluble vitamin testing: vitamins A, D, E and K are the four fat soluble vitamins. Collectively this group play an essential role in the maintenance of various aspects of your well-being. Fat-soluble vitamins help maintain bones, vision, the immune system, reproductive processes, blood coagulation and growth.

Compare all tests >

B12 Express
  • 2 tests included
  • Next day turnaround
My B12
  • 3 tests included
  • 7-day turnaround
My B12+
  • 5 tests included
  • 7-day turnaround
Nutris Vitality
  • 7 tests included
  • 7-day turnaround
D Express
  • 1 test included
  • Next day turnaround
My D+
  • 2 tests included
  • 7-day turnaround
  • 4 tests included
  • 10-day turnaround
Nutris AquaSorb
  • 9 tests included
  • 10-day turnaround

Simple and quick

We’ve made our blood testing service as easy as possible, so you can get tested at your convenience on your terms.


Choose a test panel

Select from our ever-growing range of nutritional laboratory tests without a clinician/physician’s referral.


Have your blood collected

Choose to either have your blood taken at the Blood Test Centre at St Thomas’ Hospital in London, or receive a postal pack and have blood drawn by a qualified professional in a clinic of your choice.


Access your report online

Log in to your secure Viapath Nutris account to access your laboratory report with commentary from a registered healthcare scientist.

St Thomas' Hospital

A trusted NHS partner

Viapath was formed as a centre of excellence by the Guy’s and St Thomas’ NHS Foundation Trust in 2009, and joined 18 months later by the equally renowned King’s College Hospital NHS Foundation Trust.

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