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Arsenic (Blood)

Toxicology and Exposure

69.00

The Arsenic (Blood) Test measures the concentration of arsenic circulating in your bloodstream to detect recent or acute exposure.

Turnaround time

2 working days

Biomarkers count

1

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Same-Day Appointments

UKAS Accredited Labs

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Under 18? Patients under 18 can only be seen at GB Medlabs and Clinilabs, Monday to Friday only.

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Details about Arsenic (Blood)

How It Works

Simple steps to get your results

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Book Online

Choose your test online and book in seconds. Select your preferred clinic location or home visit option.

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Visit or Test at Home

Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.

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Get Your Results

Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.

Take control of your health with London Blood Tests

How to Prepare for Your Test

Follow these guidelines for accurate results

Sample Timing

Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.

Fasting & Hydration

Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.

Medications & Supplements

Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.

Hormones & Menstrual Cycle

For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.

If you have any questions or special circumstances, our team is happy to advise before your appointment.

Frequently Asked Questions

It measures the level of arsenic circulating in your bloodstream to assess recent exposure and potential toxicity.

It’s recommended if you suspect exposure from contaminated water, food, environmental sources, certain occupations, or unexplained symptoms such as fatigue, nausea, or skin changes.

A simple venous blood sample is taken by one of our trained phlebotomists at London Blood Tests.

Fasting isn’t usually required, but you should avoid seafood for 48–72 hours as it can temporarily raise arsenic levels and affect accuracy.

Arsenic is generally detectable in blood for a short window, usually days after exposure. Longer-term exposure is better assessed through urine or hair tests.

Results are typically ready within 10 business days from the time the sample reaches our UKAS-accredited laboratory.

Common symptoms include abdominal discomfort, diarrhoea, headaches, fatigue, skin pigmentation changes, tingling in hands/feet, and in high exposure, more severe neurological or cardiac effects.

Blood testing mainly reflects recent exposure. For chronic or historical exposure, a urine or hair analysis may be more appropriate.

Yes, the test can be carried out on children, although additional support or preparation may be needed depending on age.

If elevated levels are detected, medical follow-up is important. Reducing exposure sources and assessing any health effects would be the next step.