Comparative assessment of the effect of tea and Lemon Verbena on employees’ cognitive function during a work shift

Status

Active, not recruiting

Phases

Phase 3

Study type

Interventional

Source

IRCT

Registry ID

IRCT20251030067823N1

Enrollment

128

Registered

2026-02-17

Start date

2026-02-20

Completion date

Unknown

Last updated

2026-06-01

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

Conditions

Cognitive function.

Interventions

Intervention 1: Intervention group: Tea. Intervention 2: Intervention group: Lemon Verbena. Intervention 3: Intervention group: Tea and Lemon Verbena. Intervention 4: Control group: No drink.

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: employees with at least 1 year job experience

Exclusion criteria

Exclusion criteria: Pregnancy Known psychiatric disorder Consumption of anti-depressive or sedative drugs Sleep disorders Usual tea drinking

Design outcomes

Primary

Measure	Time frame
Memory span score. Timepoint: At the beginning of the work shift and before the intervention, in the middle of the shift and at the end of the shift. Method of measurement: Wechsler questionnaire.;Attention score. Timepoint: At the beginning of the work shift and before the intervention, in the middle of the shift and at the end of the shift. Method of measurement: Stroop Test.;Reaction time. Timepoint: At the beginning of the work shift and before the intervention, in the middle of the shift and at the end of the shift. Method of measurement: Stroop test.	—

Measure

Time frame

Memory span score. Timepoint: At the beginning of the work shift and before the intervention, in the middle of the shift and at the end of the shift. Method of measurement: Wechsler questionnaire.;Attention score. Timepoint: At the beginning of the work shift and before the intervention, in the middle of the shift and at the end of the shift. Method of measurement: Stroop Test.;Reaction time. Timepoint: At the beginning of the work shift and before the intervention, in the middle of the shift and at the end of the shift. Method of measurement: Stroop test.

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Countries

Iran (Islamic Republic of)

Contacts

Public ContactAmir Houshang Mehrparvar

Yazd University of Medical Sciences

ah.mehrparvar@gmail.com0098336288116

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Jun 11, 2026