Effect of Walnuts on Sperm Parameters and Male Fertility

Completed · Not applicable

Conditions studied: Oligozoospermia, Asthenozoospermia, Teratozoospermia, Fertility

In brief

The investigators are testing the hypothesis that two ounces of whole-shelled walnuts/day added to the diet of men seeking care for infertility will beneficially affect sperm parameters and fertility. The investigators will compare the walnut intervention to the commonly suggested recommendation of adding an OTC multivitamin supplement to the diet.

Key facts

Study ID

NCT01954498

Run by

University of California, Los Angeles

People needed

80

Starts

2014-05-01

Expected to finish

2020-03-01

Last updated by the study team

2026-03-13

Who can join

Age: 21 and older. Sex: male. Healthy volunteers: not accepted.

You may qualify if…

• Age 21 years or older
• Sperm concentration < or = to 41 million per ml
• Sperm motility < or = to 40%
• Normal sperm morphology forms < or = to 5.5%
• Patients of Howard H. Kim, MD seen at the Male Reproductive Medicine and Microsurgery Clinic, Cedars-Sinai Medical Center, Los Angeles, California
• Have eaten walnuts throughout life without adverse reaction

You may not qualify if…

• Allergy to walnuts or tree nuts
• Food allergy
• Known genetic cause of infertility
• Known anatomical cause of infertility
• History of seizure disorder

Where it is running

• Male Reproductive Medicine and Microsurgery Clinic, Cedars-Sinai Medical Center — Los Angeles, California, United States
• University of California Los Angeles — Los Angeles, California, United States

Full record on ClinicalTrials.gov

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