Healthy participants
Conditions
Interventions
Group 1: 500 ml Energydrink with sugar (RedBull(R) Heidelbeer)
Group 2: 500 ml sugarfree Energydrink (RedBull(R) sugarfree)
Group 3: Placebo (sugar and caffeine-free mix of 250 ml Schweppes(R) Wild Be
Sponsors
Institut für Ernährungs- und Lebensmittelwissenschaften, Professur für Ernährungsphysiologie
Eligibility
Sex/Gender
Female
Age
18 Years to 35 Years
Inclusion criteria
Inclusion criteria: ? BMI of 18.5 to 24.9 kg/m² (normal weight) ? Stable weight within the last 6 months ? Regular menstrual cycle or use of an oral contraceptive that suppresses ovulation ? Written declaration of consent to participate in the study
Exclusion criteria
Exclusion criteria: ? Regular consumption of energy drinks (> 1 x per week) ? Regular coffee consumption of more than one cup per day ? Smoking ? Underweight or overweight/obese ? Irregular menstrual cycle in the last 6 months ? Taking medication that affects the hormone or heat balance (e.g. thyroid medication, corticosteroids, psychotropic drugs with hormonal effects, anticholinergics, beta-blockers, opioids, stimulants, paracetamol and non-steroidal anti-inflammatory drugs. The use of contraceptives is permitted). ? Known diseases of the liver, kidneys or thyroid gland ? Known gastrointestinal diseases, malabsorption and maldigestion syndrome ? Known metabolic diseases such as insulin resistance, diabetes mellitus type 1 and 2 or dyslipidemia ? Hypo- or hypertension ? Known chronic inflammatory diseases (e.g. rheumatoid arthritis) ? Mental illnesses ? Alcohol and/or drug abuse ? Pregnancy or lactation ? Sleep disorders and shift work ? Usually more than 6 hours of sport per week ? Participation in another clinical trial at the same time or within the last 30 days ? Other exclusion criteria at the discretion of the investigators
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Resting energy expenditure Substrate oxidation (respiratory quotient) Blood pressure Heart rate Core body temperature Alertness | — |
Secondary
| Measure | Time frame |
|---|---|
| Tiredness Inner Restlessness Palpitations Headache Sensation of heat | — |
Countries
Germany
Contacts
Public ContactSarah Egert
Institut für Ernährungs- und Lebensmittelwissenschaften, Professur für Ernährungsphysiologie
Outcome results
None listed