AzTrials
AzTrials

Blood SampleABBANCT07302880

The Acute Interference of Biotin in Blood Analysis

A study testing Overall: To evaluate the acute effect of biotin intake on streptavidin-based laboratory assays during the hours immediately following consumption in people with Blood Sample and Interference With Routine Analyical Tests, run by University of Copenhagen at 1 site in Denmark.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

Biotin, also known as vitamin B7, is a water-soluble vitamin. It is essential for several metabolic processes in the body, including glucose, lipid, and protein metabolism, as it acts as a coenzyme in several carboxylation reactions. Read more about this study

Who is it for?
Ages 20 to 70 yearsHealthy volunteers can take part
What is being tested?
Overall: To evaluate the acute effect of biotin intake on streptavidin-based laboratory assays during the hours immediately following consumption
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
24 participants
Where
1 siteDenmark
Study dates
17 Mar 2026to 1 Oct 2030
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 20 to 70 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Male or female between 20-70 years of age at time of screening
  • Body mass index of 18.6-25 kg/m2

Who cannot join

  • Severe liver disease (estimated by FIB4 score > 3.25)
  • Type 2 diabetes according to ADA criteria (estimated by HbA1c levels of ≥ 48 mmol/mol)
  • Significant history of alcoholism or drug/chemical abuse as per investigators judgement
  • Kidney disease defined as serum creatinine levels ≥ 126 μmol/L for male and ≥ 111 μmol/L for female or eGFR < 60 ml/min/1.73 m2
  • Cardiac problems (defined as troponin T levels > 10 ng/L for woman and >19 ng/L for men) or including any of the following, based on medical history:
  • Classified as being in New York Heart Association (NYHA) class III or IV
Show all 13Show fewer
  • Angina pectoris (chest pain) within the last 6 months
  • Acute myocardial infarction (heart attack) within last 2 years
  • Cancer within the past 1 year
  • Anemia (hemoglobin <8.3 mmol/L for men and <7.3 mmol/L for women)
  • Pregnancy (requires negative pregnancy test) or breast feeding
  • Smoking
  • Any medicine, acute illness (within the last two weeks) or other circumstances that in the opinion of the investigator might endanger the participants' safety or compliance with the protocol

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Nicolai J Wewer Albrechtsen contact

21700880 ext. 45

nicolai.albrechtsen@regionh.dk

Michael M Richter contact

michael.martin.richter.02@regionh.dk

Denmark1 site, 1 recruiting
  • Department of Clinical Biochemistry, Bispebjerg University Hospital, Copenhagen

    Copenhagen

    Nicolai J Wewer Albrechtsen, 21700880 ext. +45, nicolai.albrechtsen@regionh.dk

    Michael M Richter, michael.martin.richter.02@regionh.dk

    Recruiting

Other trials in Denmark

About this study

Biotin, also known as vitamin B7, is a water-soluble vitamin. It is essential for several metabolic processes in the body, including glucose, lipid, and protein metabolism, as it acts as a coenzyme in several carboxylation reactions. Biotin, available as an over the counter supplement, is widely used to improve nail and hair growth. The use of biotin supplements can interfere with various laboratory tests, due to the use of the streptavidin-biotin interaction in several immunoassays. The investigators therefore wish to assess the acute impact of biotin supplementation on various laboratory assays, with focus on the immediate post-ingestion effects and the time frame in which biotin interference is most pronounced.

Read the detailed description

Biotin, also known as vitamin B7, is a water-soluble vitamin. It is essential for several metabolic processes in the body, including glucose, lipid, and protein metabolism, as it acts as a coenzyme in several carboxylation reactions. Biotin, available as an over the counter supplement, is widely used to improve nail and hair growth. The use of biotin supplements can interfere with various laboratory tests, due to the use of the streptavidin-biotin interaction in several immunoassays. Therefore, if patients consume biotin supplements before blood tests, biotin may interfere with assays that rely on biotin-based analysis, especially in the first hours after biotin intake.

The investigators therefore wish to assess the acute impact of biotin supplementation on various laboratory assays, with focus on the immediate post-ingestion effects and the time frame in which biotin interference is most pronounced.

This study will provide data crucial for developing guidelines to manage and interpret test results for patients who have recently taken biotin supplements.

The primary aim of this study is to evaluate the acute effect of biotin intake on streptavidin-based laboratory assays during the hours immediately following consumption.

The investigators hypothesize that biotin intake significantly affects the results of streptavidin-based laboratory assays for up to 5 hours after consumption, leading to inaccurate test results, and that the biotin interference subsides after 24 hours.

Being tested
Overall: To evaluate the acute effect of biotin intake on streptavidin-based laboratory assays during the hours immediately following consumption, Arm 1 - 10 mg → Placebo, Arm 2 - Placebo → 10 mg, Arm 3 - 100 mg → Placebo, Arm 4 - Placebo → 100 mg

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Overall: To evaluate the acute effect of biotin intake on streptavidin-based laboratory assays during the hours immediately following consumptionOther

    The study will include two experimental days, each lasting 5 hours, as well as two short visits for a blood sample 24 hours after an experimental day.

    The setup is as follows:

    One study day with a single oral dose of biotin (randomized to either 10 mg or 100 mg), followed by a blood sample 24 hours after the study day with biotin.

    One study day with a single oral dose of placebo, followed by a blood sample 24 hours after the study day with placebo.

    The order of the two trials and the dose of biotin (either 10 mg or 100 mg) will also be randomized at inclusion.

    During the study day, subjects will rest in a supine position and an intravenous catheter is inserted into the left or right antecubital vein for collecting blood samples. Following a blood sample, subjects will receive an oral dose either 10 mg or 100 mg biotin or placebo. In total, blood will be sampled 8 times over a period of 5 hours. After 24 hours, the subject will visit again for a single blood sample.

  • Arm 1 - 10 mg → PlaceboOther

    Participants receive a 10 mg oral dose of biotin on the first study day and placebo on the second study day. Blood samples are collected over 5 hours on each visit, with an additional fasting sample 24 hours later.

  • Arm 2 - Placebo → 10 mgOther

    Participants receive placebo on the first study day and a 10 mg oral dose of biotin on the second study day. Blood samples are collected over 5 hours on each visit, with an additional fasting sample 24 hours later.

  • Arm 3 - 100 mg → PlaceboOther

    Participants receive a 100 mg oral dose of biotin on the first study day and placebo on the second study day. Blood samples are collected over 5 hours on each visit, with an additional fasting sample 24 hours later.

  • Arm 4 - Placebo → 100 mgOther

    Intervention: Participants receive placebo on the first study day and a 100 mg oral dose of biotin on the second study day. Blood samples are collected over 5 hours on each visit, with an additional fasting sample 24 hours later.

Study groups in NCT07302880
Study groupRoleWhat they receive
Arm 1 (Cohort A): 10 mg of biotin versus placeboExperimentalArm 1: 10 mg biotin → placebo (n = 6)
Receives: Other: Overall: To evaluate the acute effect of biotin intake on streptavidin-based laboratory assays during the hours immediately following consumption; Other: Arm 1 - 10 mg → Placebo
Arm 2 (Cohort A): 10 mg of biotin versus placeboExperimentalArm 2: placebo → 10 mg biotin (n = 6)
Receives: Other: Overall: To evaluate the acute effect of biotin intake on streptavidin-based laboratory assays during the hours immediately following consumption; Other: Arm 2 - Placebo → 10 mg
Arm 3 (Cohort B): 100 mg of biotin versus placeboExperimentalArm 3: 100 mg biotin → placebo (n = 6)
Receives: Other: Overall: To evaluate the acute effect of biotin intake on streptavidin-based laboratory assays during the hours immediately following consumption; Other: Arm 3 - 100 mg → Placebo
Arm 4 (Cohort B): 100 mg of biotin versus placeboExperimentalArm 4: placebo → 100 mg biotin (n = 6)
Receives: Other: Overall: To evaluate the acute effect of biotin intake on streptavidin-based laboratory assays during the hours immediately following consumption; Other: Arm 4 - Placebo → 100 mg

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. The effect of 100 mg of biotin versus placebo on plasma levels of thyroid peroxidase antibody (TPOAb)

    The effect of 100 mg of biotin versus placebo on plasma levels of thyroid peroxidase antibody (TPOAb) (defined as the difference in peak concentration level of TPOAb at t=120 minutes, calculated as the fold change between study day with biotin (100 mg biotin) and study day with placebo).

    Measured: Blood sample on study day at timepoint = 120 minutes.

Secondary outcomes (6)
  1. The effect of 100 mg of biotin versus placebo on plasma levels of thyroid peroxidase antibody (TPOAb)

    The effect of 100 mg of biotin versus placebo on plasma levels of thyroid peroxidase antibody (TPOAb) (defined as the difference in peak concentration level of TPOAb at t=30, 60, 90, 180, 240 and 300 minutes, calculated as the fold change between study day with biotin (100 mg biotin) and study day with placebo).

    Measured: Blood sample on study day at timepoint = 30, 60, 90, 180, 240, 300 minutes

  2. The effect of 10 mg of biotin versus placebo on plasma levels of thyroid peroxidase antibody (TPOAb)

    The effect of 10 mg of biotin versus placebo on plasma levels of thyroid peroxidase antibody (TPOAb) (defined as the difference in peak concentration level of TPOAb at t= 30, 60, 90, 120, 180, 240 and 300, calculated as the fold change between study day with biotin (10mg biotin) and study day with placebo.)

    Measured: Blood sample on study day at timepoint = 30, 60, 90, 120, 180, 240, 300 minutes

  3. The effect of 10 mg of biotin versus 100 mg biotin on plasma levels of thyroid peroxidase antibody (TPOAb)

    The effect of 10 mg of biotin versus 100 mg biotin on plasma levels of thyroid peroxidase antibody (TPOAb) (defined as the difference in peak concentration level of TPOAb at t=30, 60, 90, 120, 180, 240 and 300 minutes, calculated as the fold change between study day with biotin (100 mg biotin) and study day with biotin (10 mg biotin).

    Measured: Blood sample on study day at timepoint = 30, 60, 90, 120, 180, 240, 300 minutes

  4. The effect of 100 mg of biotin versus placebo on plasma levels of secondary outcomes

    The effect of 100 mg of biotin versus placebo on plasma levels of secondary outcomes, including among others insulin, TSH, TnT, C-peptide, ProBNP (defined as the difference in peak concentration levels at t=30, 60, 90, 120, 180, 240 and 300 minutes, calculated as the fold change between study day with biotin (100 mg biotin) and study day with placebo).

    Measured: Blood sample on study day at timepoint = 30, 60, 90, 120, 180, 240, 300 minutes

  5. The effect of 10 mg of biotin versus placebo on plasma levels of secondary outcomes

    The effect of 10 mg of biotin versus placebo on plasma levels of secondary outcomes, including among others insulin, TSH, TnT, C-peptide, ProBNP (defined as the difference in peak concentration levels at t=30, 60, 90, 120, 180, 240 and 300 minutes, calculated as the fold change between study day with biotin (10 mg biotin) and study day with placebo).

    Measured: Blood sample on study day at timepoint = 30, 60, 90, 120, 180, 240, 300 minutes

  6. The effect of 10 mg of biotin versus 100 mg on plasma levels of secondary outcomes

    The effect of 10 mg of biotin versus 100 mg on plasma levels of secondary outcomes, including among others insulin, TSH, TnT, C-peptide, ProBNP (defined as the difference in peak concentration levels at t=30, 60, 90, 120, 180, 240 and 300 minutes, calculated as the fold change between study day with biotin (100 mg biotin) and study day with biotin (10 mg).

    Measured: Blood sample on study day at timepoint = 30, 60, 90, 120, 180, 240, 300 minutes

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted24 Dec 2025
  2. Study start17 Mar 2026
  3. Primary completion1 Mar 2030 (estimated)
  4. Study completion1 Oct 2030 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Basic science
Allocation
Randomised
Intervention model
Crossover
Model description
Randomized, double-blinded, placebo-controlled, cross-over study.
Masking
Triple blind
Who is masked
Participant, Care provider, Investigator
Enrolment
24 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07302880
Sponsor's protocol ID
ABBA
Acronym
ABBA
Status last verified
Apr 2026
First submitted
11 Dec 2025
Last updated
6 May 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: We have not decided to share IPD as this also would require approval from the ethical and data approval committee.

Questions about this trial

What is this clinical trial studying?

A study testing Overall: To evaluate the acute effect of biotin intake on streptavidin-based laboratory assays during the hours immediately following consumption in people with Blood Sample and Interference With Routine Analyical Tests, run by University of Copenhagen at 1 site in Denmark.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 13 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 6 May 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Denmark. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Nicolai J Wewer Albrechtsen (21700880 ext. 45, nicolai.albrechtsen@regionh.dk), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

The effect of 100 mg of biotin versus placebo on plasma levels of thyroid peroxidase antibody (TPOAb) (time frame: Blood sample on study day at timepoint = 120 minutes.). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 May 2026.

Free account

Keep searching with a free account

You’ve used your 3 free searches for this session. Log in or create a free AzTrials account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in