Here we will investigate the effect of sulforaphane, provided as a broccoli sprout extract (BSE) on blood glucose in pre-diabetic individuals without metformin treatment. This will address whether BSE could be used to improve glucose control in drug-naïve pre-diabetic individuals. The participants will receive BSE or placebo in a randomized double-blind parallel arm study. The participants will take their study compound once daily over 12 weeks. The primary study variable is fasting glucose.

Here we will investigate the effect of sulforaphane, provided as a broccoli sprout extract (BSE) on blood glucose in pre-diabetic individuals without metformin treatment. This will address whether BSE could be used to improve glucose control in drug-naïve pre-diabetic individuals. The participants will receive BSE or placebo in a randomized double-blind parallel arm study. The participants will take their study compound once daily over 12 weeks. The primary study variable is fasting glucose.

Inclusion Criteria:

• Impaired fasting glucose, defined as fasting blood glucose 6.1-6.9 mM.
• Written informed consent
• Age 35-75 years. Participating women of fertile age must have no current pregnancy, which will be assessed by pregnancy test.
• Body mass index 27-45 kg/m2

Exclusion Criteria:

• Diagnosed with diabetes mellitus according to the WHO criteria
• Anti-diabetic medication
• Active liver disease
• At screening or at any subsequent visit a level of aspartate aminotransferase (ASAT) or alanine aminotransferase (ALAT) of more than three times the upper limit of the normal range
• Gastrointestinal ailments which may interfere with the ability to adequately absorb sulforaphane
• At screening visit creatinine > 130 µmol/L
• Coagulation disorder or current anti-coagulant therapy, which may be affected by the BSE
• Diagnosed with a cardiovascular disease or known cardiovascular event, transient ischemic attack, coronary by-pass surgery or other coronary vessel intervention within 6 months prior to enrolment
• Systemic glucocorticoid treatment
• Herbal treatment, defined as food supplement (except multivitamin treatment) with herbal or vegetable extracts that may affect blood glucose
• Allergy to broccoli
• Participant unable to understand the study information
• Participation in other clinical trial which may affect the outcome of the present study
• Any other physical or psychiatric condition or treatment that in the judgment of the investigator makes it difficult to participate in the study.

Each participant receives the kit that corresponds to his/her study ID. The randomization is blind to both participants and the Investigator during the study.

The randomization list is kept with the local pharmacy during the entire study. Sealed envelopes with randomization information for each participant are send to investigator and may be opened in case of emergency.