Selenium Supplementation and Prostate Health in a New Zealand Cohort

Area of Science:

• Nutritional Biochemistry
• Oncology
• Men's Health

Background:

• Variable evidence exists regarding the efficacy of 200 μg/d selenium supplementation in mitigating prostate cancer.
• Further investigation is needed to determine if specific population subgroups benefit from selenium supplementation for prostate health.

Purpose of the Study:

• To assess the impact of selenium supplementation on prostate health markers.
• To investigate whether demographic, lifestyle, genetic, and dietary factors modify the effects of selenium on prostate-specific antigen (PSA) levels.

Main Methods:

• A study involved 572 men supplemented with 200 μg/d selenium (selenized yeast) for six months.
• Serum selenium and PSA levels were measured pre- and post-supplementation.
• Stratified analyses were performed to evaluate correlations between changes in selenium and PSA levels.

Main Results:

• Selenium levels increased significantly post-supplementation, dependent on baseline levels.
• No overall correlation was found between PSA changes and selenium changes.
• Significant inverse correlations were observed in younger men, never-smokers, carriers of the GPX1 rs1050450 T allele, and those with specific dietary intakes of zinc and vitamin B12.

Conclusions:

• Life factors significantly influence the prostate health benefits derived from selenium supplementation.
• Personalized approaches may be necessary to optimize selenium's role in prostate health.