Ryan Lewis
Ryan C. Lewis, Ph.D., CIH
Managing Scientist
Health Sciences
  • Oakland

Dr. Lewis is a board-certified industrial hygienist (CIH) with 10 years of experience in exposure science and environmental and reproductive epidemiology. His work focuses on defining determinants, magnitudes, and potential health risks of exposures in occupational and community settings, including consumer product use scenarios (e.g., electronics, personal care products, chocolates and other confectionery, dietary supplements, and drinkware). He has a special interest in approaches to evaluate and minimize exposure measurement error in epidemiology studies. He has experience with various exposure assessment approaches, such as field studies, simulation studies, exposure biomarkers, exposure reconstruction with historical data, and secondary data analyses. His work has involved children and adults, including pregnant women and those with subfertility, and a wide range of chemical (e.g., heavy metals, insecticides, volatile organic compounds, phthalates, bisphenol A, asbestos, perfluoroalkyl substances, nitrate, and chlorine) and physical agents (e.g., extremely low- and radio-frequency electromagnetic fields and noise).

Dr. Lewis completed his Ph.D. in Environmental Health Sciences from the University of Michigan, where he was a Rackham Pre-doctoral Fellow and recipient of the American Industrial Hygiene Association (AIHA)’s John A. Leonowich Award for educational excellence in non-ionizing radiation. His dissertation research concerned extremely low-frequency magnetic fields and was at the interface of exposure science and reproductive epidemiology. He also has an M.S. in Environmental Health from the Harvard School of Public Health.

Dr. Lewis has co-authored 16 papers (12 as first author) that have been published in the peer reviewed literature and have concerned human exposures to a variety of environmental agents. He also serves as a peer reviewer for several scientific journals, is on the editorial board of Journal of Toxicology and Environmental Health, and is a member of AIHA’s Non-Ionization Radiation Committee.

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Environmental Health Sciences, University of Michigan, Ann Arbor, 2015
  • M.S., Environmental Health, Harvard School of Public Health, 2006
  • B.S., Anthropology, University of Michigan, Ann Arbor, 2003
  • AIHA Conference Scholarship, 2015

    AIHA John A. Leonowich Award (for educational excellence in non-ionizing radiation), 2015

    University of Michigan Rackham Predoctoral Fellow, 2014–2015

    University of Michigan Rackham International Travel Grant, 2013

    National Institute for Occupational Safety and Health Graduate Fellowship, 2005–2006, 2011–2012

    University of Michigan James B. Angell Scholar, 2004

    University of Michigan Undergraduate Degree with Distinction, 2003

    University of Michigan University Honors, 2001–2003

LICENSES & CERTIFICATIONS

Certified Industrial Hygienist, American Board of Industrial Hygiene, CP# 9947, 2011 (recertified 2016)

Publications

Lewis RC, Johns LE, Meeker JD. Exploratory analysis of the potential relationship between urinary molybdenum and bone mineral density among adult men and women from NHANES 2007-2010. Chemosphere 2016; 164:677-682.

Ferguson KK, Colacino JA, Lewis RC, Meeker JD. Personal care product use among adults in NHANES: associations between urinary phthalate metabolites and phenols and use of mouthwash and sunscreen. Journal of Exposure Science and Environmental Epidemiology. doi: 10.1038/jes.2016.27. [Epub ahead of print].

Lewis RC, Hauser R, Maynard AD, Neitzel RL, Wang L, Kavet R, Meeker JD. Exposure to power-frequency magnetic fields and the risk of infertility and adverse pregnancy outcomes: update on the human evidence and recommendations for future study designs. Journal of Toxicology and Environmental Health, Part B: Critical Reviews 2015; 19:29-45.

Lewis RC, Hauser R, Maynard AD, Neitzel RL, Wang L, Kavet R, Morey P, Ford JB, Meeker JD; EARTH Study Team. Personal measures of power-frequency magnetic field exposure among men from an infertility clinic: distribution, temporal variability, and correlation with their female partners’ exposure. Radiation Protection Dosimetry 2015. doi: 10.1093/rpd/ncv515 [Epub ahead of print].

Lewis RC, Hauser R, Wang L, Kavet R, Meeker JD. Personal power-frequency magnetic field exposure in women recruited at an infertility clinic: Association with physical activity and temporal variability. Radiation Protection Dosimetry 2015; 168:478-488.

Lewis RC, Johns LE, Meeker JD. Serum biomarkers of exposure to perfluoroalkyl substances in relation to serum testosterone and measures of thyroid function among adults and adolescents from NHANES 2011–2012. International Journal of Environmental Research and Public Health 2015; 12:6098–6114.

Omoike OE, Lewis RC, Meeker JD. Association between urinary biomarkers of exposure to organophosphate insecticides and serum reproductive hormones in men from NHANES 1999–2002. Reproductive Toxicology 2015; 53:99–104.

Bowman DM, Lewis RC, Yeo C, Lee M. The growing public health challenges of exposure to ultraviolet radiation from use of indoor tanning devices in the United States. New Solutions: A Journal of Environmental and Occupational Health Policy 2015; 25:164-171.

Lewis RC, Cantonwine DE, Anzalota Del Toro LV, Calafat AM, Valentin-Blasini L, Davis MD, Montesano MA, Alshawabkeh AN, Cordero JF, Meeker JD. Distribution and determinants of urinary biomarkers of exposure to organophosphate insecticides in Puerto Rican pregnant women. Science of the Total Environment 2015; 512–513:337–344.

Lewis RC, Meeker JD. Biomarkers of exposure to molybdenum and other metals in relation to testosterone among men from the United States National Health and Nutrition Examination Survey 2011–2012. Fertility and Sterility 2015; 103(1):172–178.

Lewis RC, Evenson KR, Savitz DA, Meeker JD. Temporal variability of daily personal magnetic field exposure metrics in pregnant women. Journal of Exposure Science and Environmental Epidemiology 2015; 25(1):58–64.

Lewis RC, Cantonwine DE, Anzalota Del Toro LV, Calafat AM, Valentin-Blasini L, Davis MD, Baker SE, Alshawabkeh AN, Cordero JF, Meeker JD. Urinary biomarkers of exposure to insecticides, herbicides, and one insect repellent among pregnant women in Puerto Rico. Environmental Health 2014; 13(1):97.

Lewis RC, Meeker JD, Peterson KE, Lee JM, Cantoral A, Tellez-Rojo MM. Predictors of urinary bisphenol A and phthalate metabolite concentrations in Mexican children. Chemosphere 2013; 93(10):2390–2398.

Lewis RC, Gershon RRM, Neitzel RL. Estimation of permanent noise-induced hearing loss in an urban setting. Environmental Science and Technology 2013; 47(12):6393–6399.

Lewis RC, Gaffney SH, Le MH, Unice KM, Paustenbach DJ. Airborne concentrations of metals and total dust during solid catalyst loading and unloading operations at a petroleum refinery. International Journal of Hygiene and Environmental Health 2012; 215(5):514–521.

Beebe-Dimmer JL, Lange LA, Cain JE, Lewis RC, Ray AM, Sarma AV, Lange EM, Cooney KA. Polymorphisms in the prostate-specific antigen gene promoter do not predict serum prostate-specific antigen levels in African-American men. Prostate Cancer and Prostatic Diseases 2006; 9(1):50–55.

Technical Reports

Gosman S, Lewis R, Bowman D. Chemical use (in “High volume hydraulic fracturing in Michigan: Integrated assessment final report”). Ch. 4, University of Michigan Graham Sustainability Institute, Ann Arbor, MI. September 2015.

Lewis RC, Hauser R, Meeker JD. A pilot study of pregnancy outcome, physical activity, and magnetic field exposure: A technical update prepared for EPRI Environment Division. Electric Power Research Institute, Palo Alto, CA. 2012. Product ID: 1025386.

Conference Abstracts


Gauthier A, Lewis R, Kalmes, R. Hand-to-mouth contact frequency among adults: review of the literature and recommendations for future studies. Poster presentation at Society of Environmental Toxicology and Chemistry Annual Meeting, Orlando, FL, November 6-10, 2016.

Lewis RC, Singhal A, Gauthier A, Kalmes R, Sheehan P. Proposed methods for characterizing dermal exposure to BPA for purposes of Proposition 65. Poster presentation at Society for Risk Analysis Annual Meeting, San Diego, CA, December 11-15, 2016.

Lewis RC, Meeker JD, Mínguez-Alarcón L, Mezei G, Hauser R. Self-reported cell phone use patterns and semen quality parameters among men from an infertility clinic. Poster presentation by fourth author at BioEM2016, Ghent, Belgium, June 5-10, 2016.

Lewis RC. Exposure to power-frequency magnetic fields and risk of adverse reproductive health outcomes: the case for additional research. Oral presentation as part of RT 234, “What do I need to know about nonionizing radiation?” at American Industrial Hygiene Conference & Exposition, Baltimore, MD, May 21-26, 2016.

Lewis RC, Meeker JD, Peterson KE, Cantoral A, Schnaas L, Tellez-Rojo MM. Predictors of urinary bisphenol A and phthalate metabolite concentrations in Mexican children. Poster presentation at International Society of Exposure Science Annual Conference, Basel, Switzerland, August 19–23, 2013. Abstract P-1-13-13.

Lewis RC, Gaffney SH, Le MH, Unice KM, Paustenbach DJ. Airborne concentrations of metals and total dust during solid catalyst loading and unloading operations at a petroleum refinery. Poster presentation at International Society of Exposure Science Annual Conference, Baltimore, MD, October 23–27, 2011. Abstract WP1-06.

Lewis RC. Global welding practices: manganese exposure assessment, control, and litigation. Roundtable arranger at American Industrial Hygiene Conference & Exposition, Toronto, ON. May 30-June 4, 2009. Abstract RT 241.

Lewis RC, Herrick RF, Tan KT, Yep-Abu MR. Dilution ventilation to control welding fumes in a crude oil tank at a shipyard in Singapore. Poster presentation at American Industrial Hygiene Conference & Exposition, Chicago, IL, May 13–18, 2006. Abstract G7.

Academic and Other Invited Presentations

Lewis RC. Biological hazards. Oral presentation (guest lecture) in EHS 550: Introduction to Occupational and Environmental Health, University of Michigan School of Public Health, November 3, 2014.

Hauser R, Lewis RC. Magnetic fields and pregnancy loss: Four-year study among couples from a fertility clinic. Joint oral presentation at the Electric Power Research Institute (EPRI) Electric and Magnetic Fields and Radio-Frequency Health Assessment and Safety Scientific Advisory Committee Meeting, Palo Alto, CA, September 3, 2014.

Hauser R, Lewis RC. Magnetic fields and pregnancy loss: Four-year study among couples from a fertility clinic. Joint oral presentation at the Electric Power Research Institute (EPRI) Environmental Program Council Advisory Meeting, San Francisco, CA, February 25, 2014.

Lewis RC. Biological hazards. Oral presentation (guest lecture) in EHS 550: Introduction to Occupational and Environmental Health, University of Michigan School of Public Health, October 28, 2013.

Lewis RC. Exposure to 60 Hz magnetic fields and reproductive health. Oral presentation (guest lecture) in EHS 675: Advanced Exposure Assessment, University of Michigan School of Public Health, April 9, 2013.

Lewis RC. Epidemiology: a brief overview. Oral presentation (guest lecture) in the University of Michigan-American Industrial Hygiene Association Comprehensive Industrial Hygiene Review Course, Ann Arbor, MI, March 21, 2012.

Lewis RC. Dilution ventilation to control welding fumes in a crude oil tank at a shipyard in Singapore. Oral presentation in Harvard School of Public Health Seminar Series in Occupational Health, Boston, MA, April 25, 2006.

Prior Experience

Graduate Student Research Assistant, University of Michigan, 2011–2015

Senior Associate Health Scientist, ChemRisk, 2008–2011

Staff Scientist, Golder Associates, 2006–2008

Intern, Singapore Ministry of Manpower, Occupational Safety & Health Division, 2006

Intern, Dana-Farber Cancer Institute, Department of EH&S, 2005

Research Assistant, University of Michigan Comprehensive Cancer Center, 2003–2004

Professional Affiliations

International Society of Exposure Science, 2013–present

American Industrial Hygiene Association, 2004–present

  • Non-Ionizing Radiation Committee, 2015–present

Additional Information

Editorships and Editorial Review Boards

Journal of Toxicology and Environmental Health, Part A: Current Issues (2015–present)

Toxicology and Industrial Health (2016)

Peer Reviewer

Annals of Occupational Hygiene

BMC Public Health

BMJ Open

Chemosphere

Ear and Hearing

Environment International

Environmental Health Perspectives

Environmental Pollution

Environmental Research

International Archives of Occupational and Environmental Health

International Journal of Hygiene and Environmental Health

International Journal of Environmental Research and Public Health

Journal of Exposure Science and Environmental Epidemiology

Journal of Occupational and Environmental Hygiene

Journal of Toxicology and Environmental Health, Part A: Current Issues

Journal of Toxicology and Environmental Health, Part B: Critical Reviews

Science of the Total Environment

Toxicology and Industrial Health

News & Events

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Environmental Health Sciences, University of Michigan, Ann Arbor, 2015
  • M.S., Environmental Health, Harvard School of Public Health, 2006
  • B.S., Anthropology, University of Michigan, Ann Arbor, 2003
  • AIHA Conference Scholarship, 2015

    AIHA John A. Leonowich Award (for educational excellence in non-ionizing radiation), 2015

    University of Michigan Rackham Predoctoral Fellow, 2014–2015

    University of Michigan Rackham International Travel Grant, 2013

    National Institute for Occupational Safety and Health Graduate Fellowship, 2005–2006, 2011–2012

    University of Michigan James B. Angell Scholar, 2004

    University of Michigan Undergraduate Degree with Distinction, 2003

    University of Michigan University Honors, 2001–2003

LICENSES & CERTIFICATIONS

Certified Industrial Hygienist, American Board of Industrial Hygiene, CP# 9947, 2011 (recertified 2016)