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Trans fatty acid intake is inversely related to total sperm count in young healthy men.
Hum Reprod. 2014 Mar; 29(3):429-40.HR

Abstract

STUDY QUESTION

Is intake of fatty acids related to semen quality among young men?

SUMMARY ANSWER

The intake of trans fatty acids is inversely related to total sperm count in healthy young men.

WHAT IS KNOWN ALREADY

Spain has seen an increase in the proportion of calories consumed as fat over the same period that a downward trend in semen quality has been observed. In addition, rodent models suggest that trans fat intake may severely affect testicular function.

STUDY DESIGN, SIZE, DURATION

Cross-sectional study of 209 men recruited between October 2010 and November 2011.

PARTICIPANTS/MATERIALS, SETTING, METHODS

A group of 209 healthy young university students 18-23 years of age provided a semen sample and completed a previously validated food frequency questionnaire. The association between intake of fatty acids with semen quality parameters (sperm concentration, motility, morphology and total count) was assessed using multivariate linear regression.

MAIN RESULTS AND THE ROLE OF THE CHANCE

Trans fatty acid intake was inversely related to total sperm count after adjusting for potential confounders (P, trend = 0.03). The multivariate adjusted mean (95% confidence interval) total sperm count in increasing quartiles of trans fat intake was 144 (110-190), 113 (87-148), 100 (18-130) and 89 (69-117). There also was an inverse association between cholesterol intake and ejaculate volume (P, trend = 0.04). No other statistically significant relations were observed.

LIMITATIONS, REASONS FOR CAUTION

The cross-sectional design of the study limits causal inference, we cannot exclude the possibility of unmeasured confounding and there was insufficient statistical power to identify modest associations.

WIDER IMPLICATIONS OF THE FINDINGS

The results of this study, together with previous experimental work in rodents and biomarker studies among infertility patients, suggest that intake of trans fatty acids may be related to lower semen quality. Although the data provide further evidence that diet is a modifiable factor that could impact male fertility, it is not known whether the observed differences in sperm count translate into differences in fertility.

STUDY FUNDING/COMPETING INTEREST(S)

This work was supported by The Seneca Foundation, Regional Agency of Science and Technology, grant no 00694/PI/04, Ministerio de Ciencia e Innovación, Instituto de Salud Carlos III (FIS), grant no PI10/00985, and grant P30 DK46200 from the National Institutes of Health. The authors have no competing interests to declare.

Authors+Show Affiliations

Department of Nutrition, Harvard School of Public Health, Boston, MA 02115, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Observational Study
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24419496

Citation

Chavarro, Jorge E., et al. "Trans Fatty Acid Intake Is Inversely Related to Total Sperm Count in Young Healthy Men." Human Reproduction (Oxford, England), vol. 29, no. 3, 2014, pp. 429-40.
Chavarro JE, Mínguez-Alarcón L, Mendiola J, et al. Trans fatty acid intake is inversely related to total sperm count in young healthy men. Hum Reprod. 2014;29(3):429-40.
Chavarro, J. E., Mínguez-Alarcón, L., Mendiola, J., Cutillas-Tolín, A., López-Espín, J. J., & Torres-Cantero, A. M. (2014). Trans fatty acid intake is inversely related to total sperm count in young healthy men. Human Reproduction (Oxford, England), 29(3), 429-40. https://doi.org/10.1093/humrep/det464
Chavarro JE, et al. Trans Fatty Acid Intake Is Inversely Related to Total Sperm Count in Young Healthy Men. Hum Reprod. 2014;29(3):429-40. PubMed PMID: 24419496.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Trans fatty acid intake is inversely related to total sperm count in young healthy men. AU - Chavarro,Jorge E, AU - Mínguez-Alarcón,Lidia, AU - Mendiola,Jaime, AU - Cutillas-Tolín,Ana, AU - López-Espín,José J, AU - Torres-Cantero,Alberto M, Y1 - 2014/01/12/ PY - 2014/1/15/entrez PY - 2014/1/15/pubmed PY - 2014/10/1/medline KW - fat intake KW - semen quality KW - trans fatty acids KW - young healthy men SP - 429 EP - 40 JF - Human reproduction (Oxford, England) JO - Hum Reprod VL - 29 IS - 3 N2 - STUDY QUESTION: Is intake of fatty acids related to semen quality among young men? SUMMARY ANSWER: The intake of trans fatty acids is inversely related to total sperm count in healthy young men. WHAT IS KNOWN ALREADY: Spain has seen an increase in the proportion of calories consumed as fat over the same period that a downward trend in semen quality has been observed. In addition, rodent models suggest that trans fat intake may severely affect testicular function. STUDY DESIGN, SIZE, DURATION: Cross-sectional study of 209 men recruited between October 2010 and November 2011. PARTICIPANTS/MATERIALS, SETTING, METHODS: A group of 209 healthy young university students 18-23 years of age provided a semen sample and completed a previously validated food frequency questionnaire. The association between intake of fatty acids with semen quality parameters (sperm concentration, motility, morphology and total count) was assessed using multivariate linear regression. MAIN RESULTS AND THE ROLE OF THE CHANCE: Trans fatty acid intake was inversely related to total sperm count after adjusting for potential confounders (P, trend = 0.03). The multivariate adjusted mean (95% confidence interval) total sperm count in increasing quartiles of trans fat intake was 144 (110-190), 113 (87-148), 100 (18-130) and 89 (69-117). There also was an inverse association between cholesterol intake and ejaculate volume (P, trend = 0.04). No other statistically significant relations were observed. LIMITATIONS, REASONS FOR CAUTION: The cross-sectional design of the study limits causal inference, we cannot exclude the possibility of unmeasured confounding and there was insufficient statistical power to identify modest associations. WIDER IMPLICATIONS OF THE FINDINGS: The results of this study, together with previous experimental work in rodents and biomarker studies among infertility patients, suggest that intake of trans fatty acids may be related to lower semen quality. Although the data provide further evidence that diet is a modifiable factor that could impact male fertility, it is not known whether the observed differences in sperm count translate into differences in fertility. STUDY FUNDING/COMPETING INTEREST(S): This work was supported by The Seneca Foundation, Regional Agency of Science and Technology, grant no 00694/PI/04, Ministerio de Ciencia e Innovación, Instituto de Salud Carlos III (FIS), grant no PI10/00985, and grant P30 DK46200 from the National Institutes of Health. The authors have no competing interests to declare. SN - 1460-2350 UR - https://www.unboundmedicine.com/medline/citation/24419496/Trans_fatty_acid_intake_is_inversely_related_to_total_sperm_count_in_young_healthy_men_ L2 - https://academic.oup.com/humrep/article-lookup/doi/10.1093/humrep/det464 DB - PRIME DP - Unbound Medicine ER -