To investigate the effects of an omnivorous vs. vegan diet on health parameters, we are looking for:

• Healthy, normal-weight women (BMI: 18.5–24.9 kg/m²)

• Aged between 18 and 40 years

• Not currently following a vegetarian or vegan diet

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To investigate the effects of xanthohumol on the immune system, we are looking for:

• Women and men between 18 and 70 years of age

• Without any unusual dietary habits (e.g., vegan diet, special medical diets)

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To investigate the dosage and duration of action of hop compounds on parameters of the immune response, we are looking for:

• Women and men between 18 and 70 years of age

• Without any unusual dietary habits (e.g., vegan diet, special medical diets)

For more information: