Effect of caffeine on Growth Hormone and Testosterone

The Effect of Caffeine Supplementation on Growth Hormone and Testosterone after Resistance Exercise According to the Polymorphism of Cytochrome P450

Status

Active, not recruiting

Phases

Phase 2

Study type

Interventional

Source

IRCT

Registry ID

IRCT20170405033231N2

Enrollment

Registered

2019-04-20

Start date

2019-02-19

Completion date

Unknown

Last updated

2019-04-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Effect of caffeine consumption on growth hormone in athletes. Encounter for examination for participation in sport

Interventions

Intervention 1: Intervention group: caffeine consumption. Intervention 2: Control group: Placebo (Maltodextrin).

Eligibility

Sex/Gender

Male

Age

18 Years to 25 Years

Inclusion criteria

Inclusion criteria: Resistance trained athletes

Exclusion criteria

Exclusion criteria: untrained

Design outcomes

Primary

Measure	Time frame
Levels of growth hormone and testosterone in athletes due to the effect of resistance training. Timepoint: Pre and post of supllement consumption. Method of measurement: ELISA.	—

Countries

Iran (Islamic Republic of)

Contacts

Public ContactRahman Rahimi

University of Kurdistan

r.rahimi@uok.ac.ir+98 87 3366 7765

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026