Contribute to science and earn €160,-

Maastricht University, location Venlo, is looking for volunteers to investigate the effect of administration of quinine (a bitter tastant) in the mouth and in the stomach on satiety and food intake.

We are looking for: 32 HEALTHY VOLUNTEERS (M/F) aged 18 to 65 years

The study consists of 4 test days. On arrival at the test facility, you will receive a standardized liquid breakfast. After 150 minutes you will ingest a capsule containing either quinine or placebo followed by a modified sham feeding (sip and spit) with 120mL of tap water with or without added quinine. Fifty minutes after ingestion and sham feeding, you will receive a meal of which you can eat as much as you like, until you are comfortably full.

During the test day you will receive 9 short questionnaires on which you can depict how satiated you feel and whether you are experiencing complaints by placing vertical ticks on a horizontal line of 10cm. 4 times during the test day the variability of the interval between various heart beats will be measured using a sort of electrocardiogram.

After full participation you will receive a participation fee of €160.

You will qualify for this study if you:

  • Have a BMI between 18 and 25 kg/m2
  • Are not a smoker
  • Don’t use medication (with exception of contraceptives)
  • Don’t drink more than 20 alcoholic units per week
  • Are sufficient in written Dutch language

Did you know...

Quinine is an old-time cure for malaria and tonic water contains lots of it.

This makes gin-tonic a tasty medicine!

After full participation you will receive a participation fee of €160.

If you are interested in participating in this study, you can contact Drs. T. Klaassen MD, tel 043-3882134 ( You can receive more information about this study. Participation is completely non-committal and you can stop participating at any given time, without giving a reason.

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