# Placebo Effects Investigated by Different Experimental Designs

> **NCT04317157** · NA · UNKNOWN · sponsor: **University of Sao Paulo** · enrollment: 18 (estimated)

## Conditions studied

- Caffeine
- Placebo
- Baseline

## Interventions

- **DIETARY_SUPPLEMENT:** Caffeine
- **OTHER:** Placebo

## Key facts

- **NCT ID:** NCT04317157
- **Lead sponsor:** University of Sao Paulo
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2022-01
- **Primary completion:** 2022-07
- **Final completion:** 2022-08
- **Target enrollment:** 18 (ESTIMATED)
- **Last updated:** 2021-06-15

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04317157

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04317157, "Placebo Effects Investigated by Different Experimental Designs". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT04317157. Licensed CC0.

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