Chiharu Iwasaka

Settsu, Japan

Last Updated: 09/26/2026

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Found 20 publications

Impact of pre-vaccination active vitamin D levels on COVID-19 mRNA vaccine-induced immunity in a Japanese cohort.

Impact of pre-vaccination active vitamin D levels on COVID-19 mRNA vaccine-induced immunity in a Japanese cohort.

Journal: Vaccine

Published: March 12, 2026

Effect of short-term dietary intervention on fecal serotonin, gut microbiome-derived tryptophanase, and energy absorption in a randomized crossover trial: an exploratory analysis.

Effect of short-term dietary intervention on fecal serotonin, gut microbiome-derived tryptophanase, and energy absorption in a randomized crossover trial: an exploratory analysis.

Journal: Gut microbes

Published: June 09, 2025

Comparison of polygenic risk scores for type 2 diabetes developed from different ancestry groups.

Comparison of polygenic risk scores for type 2 diabetes developed from different ancestry groups.

Journal: npj metabolic health and disease

Published: October 27, 2024

Interaction between Habitual Green Tea and Coffee Consumption and ACTN3 Genotype in Association with Skeletal Muscle Mass and Strength in Middle-Aged and Older Adults.

Interaction between Habitual Green Tea and Coffee Consumption and ACTN3 Genotype in Association with Skeletal Muscle Mass and Strength in Middle-Aged and Older Adults.

Journal: The Journal of frailty & aging

Published: July 31, 2024

Asian Flush Gene Variant Enhances Cellular Immunogenicity of COVID-19 Vaccine: Prospective Observation in the Japanese General Population.

Asian Flush Gene Variant Enhances Cellular Immunogenicity of COVID-19 Vaccine: Prospective Observation in the Japanese General Population.

Journal: Vaccines

Published: July 18, 2024

Association between physical activity and the N-terminal pro-brain natriuretic peptide in a middle-aged Japanese population: The interaction with alcohol consumption, 2005-2006.

Association between physical activity and the N-terminal pro-brain natriuretic peptide in a middle-aged Japanese population: The interaction with alcohol consumption, 2005-2006.

Journal: Preventive medicine

Published: May 13, 2024

MOTS-c modulates skeletal muscle function by directly binding and activating CK2.

MOTS-c modulates skeletal muscle function by directly binding and activating CK2.

Journal: iScience

Published: February 06, 2024

Association of skeletal muscle function, quantity, and quality with gut microbiota in Japanese adults: A cross-sectional study.

Association of skeletal muscle function, quantity, and quality with gut microbiota in Japanese adults: A cross-sectional study.

Journal: Geriatrics & gerontology international

Published: August 14, 2023

Association between green tea and coffee consumption and body iron storage in Japanese men and women: a cross-sectional study from the J-MICC Study Saga.

Association between green tea and coffee consumption and body iron storage in Japanese men and women: a cross-sectional study from the J-MICC Study Saga.

Journal: Frontiers in nutrition

Published: June 29, 2023

Association Between the Appendicular Extracellular-to-Intracellular Water Ratio and All-Cause Mortality: A 10-Year Longitudinal Study.

Association Between the Appendicular Extracellular-to-Intracellular Water Ratio and All-Cause Mortality: A 10-Year Longitudinal Study.

Journal: The journals of gerontology. Series A, Biological sciences and medical sciences

Published: April 27, 2023

Dose-response relationship between daily step count and prevalence of sarcopenia: A cross-sectional study.

Dose-response relationship between daily step count and prevalence of sarcopenia: A cross-sectional study.

Journal: Experimental gerontology

Published: December 27, 2022

Association between physical activity and the prevalence of tumorigenic bacteria in the gut microbiota of Japanese adults: a cross-sectional study.

Association between physical activity and the prevalence of tumorigenic bacteria in the gut microbiota of Japanese adults: a cross-sectional study.

Journal: Scientific reports

Published: December 01, 2022

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Last Updated: 09/26/2026