Effects of Chlorella intake on eyesight and cognitive function in young healthy men

Effects of Chlorella intake on eyesight and cognitive function in young healthy men - Effects of Chlorella intake on eyesight and cognitive function

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000050699

Enrollment

Registered

2023-04-01

Start date

2023-04-01

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Healthy population

Interventions

Chlorella intake: 6 g/day (as bulk powder), 15 tablets * 2 times/day, 12 weeks Placebo intake: 7 g/day (maltodextrin), 15 tablets * 2 times/day, 12 weeks

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: Corrected eyesight more than or equal to 1.0 Native language is Japanese

Exclusion criteria

Exclusion criteria: Current smoker Currently taking Warfarin A history or presence of ophthalmic diseases (except nearsightedness and astigmatism) Current participation or intention to participate in other clinical trials Considered ineligible judged by the principal investigator

Design outcomes

Primary

Measure	Time frame
[Before and after the 12-week intervention] Cognitive function	—

Secondary

Measure	Time frame
[Before and after the 12-week intervention] Eyesight, cerebral blood flow, body composition, blood chemistry parameters (e.g., plasma lutein concentration)	—

Countries

Japan

Contacts

Public ContactKazuya Suwabe

Ryutsu Keizai University Faculty of Health and Sport Sciences

ksuwabe@rku.ac.jp0297-64-0001

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026