Publications

Selected Scientific Publications


July 2019

Research Article ǀ Open Access ǀ Curcumin, Sports Nutrition, Performance

Eight Weeks of a High Dose of Curcumin Supplementation May Attenuate Performance Decrements Following Muscle-Damaging Exercise.

(www.mdpi.com/2072-6643/11/7/1692)
Ralf Jäger, Martin Purpura, Chad M Kerksick
Nutrients 2019, 11:1642.


August 2018

Review ǀ Open Access ǀ Sports Nutrition, Protein, Creatine

ISSN exercise & sports nutrition review update: research & recommendations.

(jissn.biomedcentral.com/articles/10.1186/s12970-018-0242-y)
Chad M. Kerksick, Colin D. Wilborn, Michael D. Roberts, Abbie Smith-Ryan, Susan M. Kleiner, Ralf Jäger, Rick Collins, Mathew Cooke, Jaci N. Davis, Elfego Galvan, Mike Greenwood, Lonnie M. Lowery, Robert Wildman, Jose Antonio, Richard B. Kreider
J Int Soc Sports Nutr 2018, 15:38.


August 2018

Research Article ǀ Open Access ǀ Capsaicinoids, Weight Management, Body Fat

Capsaicinoids supplementation decreases percent body fat and fat mass: adjustment using covariates in a post hoc analysis.

(https://jissn.biomedcentral.com/articles/10.1186/s40608-018-0197-1)
James Rogers, Stacie L. Urbina, Lem W. Taylor, Colin D. Wilborn, Martin Purpura, Ralf Jäger, Vijaya Juturu
BMC Obesity 2018, 5:22.


April 2018

Research Article ǀ Open Access ǀ Muscle Health, Sports Nutrition, Krill Oil

The Effects of Krill Oil on mTOR Signaling and Resistance Exercise: A Pilot Study

(www.hindawi.com/journals/jnme/2018/7625981/)
John Georges, Matthew H. Sharp, Ryan P. Lowery, Jacob M. Wilson, Martin Purpura, Troy A. Hornberger, Flint Harding, James H. Johnson, David M. Peele, Ralf Jäger
J Nutr Metab 2018, 2018:7625981.


April 2018

Research Article ǀ Open Access ǀ Curcumin, Bioavailability

Analysis of different innovative formulations of curcumin for improved relative oral bioavailability in human subjects

(link.springer.com/article/10.1007%2Fs00394-016-1376-9)
Martin Purpura, Ryan P. Lowery, Jacob M. Wilson, Haider Mannan, Gerald Münch, Valentina Razmovski-Naumovski
Eur J Nutr 2018, 57:929.


December 2017

Review ǀ Open Access ǀ Gut Health, Probiotics, Protein

Probiotic Bacillus coagulans GBI-30, 6086 Improves Protein Absorption and Utilization.

(link.springer.com/article/10.1007%2Fs12602-017-9354-y)
Ralf Jäger, Martin Purpura, Sean Farmer, Howard A. Cash, David Keller
Probiotics Antimicrob Proteins 2017, Dec 1 [Epub ahead of print].


June 2017

Research Article ǀ Open Access ǀ Weight Management, Appetite, Capsaicinoids

Effects of twelve weeks of capsaicinoid supplementation on body composition, appetite and self-reported caloric intake in overweight individuals.

(www.sciencedirect.com/science/article/pii/S0195666317302623)
Stacie L. Urbina, Michael D. Roberts, Wesley C. Kephart, Katelyn B. Villa, Emily N. Santos, Alyssa M. Olivencia, Haley M. Bennett, Marissa D. Lara, Cliffa A. Foster, Martin Purpura, Ralf Jäger, Lem W. Taylor, Colin D. Wilborn
Appetite 2017, 113:264-273.


June 2017

Review ǀ Open Access ǀ Muscle Health, Sports Nutrition, Protein

International Society of Sports Nutrition Position Stand: Protein and Exercise.

(https://jissn.biomedcentral.com/articles/10.1186/s12970-017-0177-8)
Ralf Jäger, Chad M. Kerksick, Bill I. Campbell, Paul J. Cribb, Shawn D. Wells, Tim M. Skwiat, Martin Purpura, Tim N. Ziegenfuss, Arny A. Ferrando, Shwan M. Arent, Abbie E. Smith-Ryan, Jeffrey R. Stout, Paul J. Arciero, Michael J. Ormsbee, Lem W. Taylor, Colin D. Wilborn, Doug S. Kalman, Richard B. Kreider, Darryn S. Willoughby, Jay R. Hoffman, Jamie L. Krzykowski, Jose Antonio
J Int Soc Sports Nutr 2017, 14:20.


April 2017

Poster Presentation ǀ Open Access ǀ Curcumin, Performance, Sports Nutrition

Novel Form of Curcumin Attenuates Performance Decrements Following Muscle Damaging Exercise

(www.fasebj.org/doi/abs/10.1096/fasebj.31.1_supplement.lb415)
Jonathan M. Oliver, Aaron R. Caldwell, Elizabeth Sanders, Joel B. Mitchell, David Rowlands, Martin Purpura, Ralf Jäger
FASEB J. 2017, 31(1):Supplement lb415


April 2017

Poster Presentation ǀ Open Access ǀ Curcumin, Muscle Damage, Sports Nutrition

Curcumin Reduces Muscle Damage and Soreness Following Muscle-Damaging Exercise

(www.fasebj.org/doi/abs/10.1096/fasebj.31.1_supplement.lb766)
Ralf Jäger, Aaron R. Caldwell, Elizabeth Sanders, Joel B. Mitchell, James Rogers, Martin Purpura, Jonathan M. Oliver
FASEB J. 2017, 31(1):Supplement lb766


January 2017

Research Article ǀ Open Access ǀ Muscle Health, Sports Nutrition, ATP

Oral Adenosine-5′-Triphosphate (ATP) Administration Increases Post-Exercise ATP Levels, Muscle Excitability and Athletic Performance Following a Repeated Sprint Bout.

(https://www.tandfonline.com/doi/abs/10.1080/07315724.2016.1246989)
Martin Purpura, John A. Rathmacher, Matthew H. Sharp, Ryan P. Lowery, Kevin A. Shields, Jeremy M. Partl, Jacob M. Wilson, Ralf Jäger
J Am Coll Nutr. 2017, 36(3):177-183.


October 2016

Research Article ǀ Open Access ǀ Probiotics, Sports Nutrition, Performance

Probiotic Streptococcus thermophilus FP4 and Bifidobacterium breve BR03 Supplementation Attenuates Performance and Range-of-Motion Decrements Following Muscle Damaging Exercise

(www.mdpi.com/2072-6643/8/10/642)
Ralf Jäger, Martin Purpura, Jason D. Stone, Stephanie M. Turner, Anthony J Anzalone, Micah J. EImerbrink, M. Pane. Angela Amoruso, David S. Rowlands, Jonathan M. Oliver
Nutrients 2016, 8(10):642.


September 2016

Poster Presentation ǀ Open Access ǀ Creatine, Bioavaialability

Reduction of plasma creatine concentrations as an indicator of improved bioavailability

(https://jissn.biomedcentral.com/articles/10.1186/s12970-016-0144-9)
Ralf Jäger, Martin Purpura, Roger C. Harris
J Int Soc Sports Nutr 2016, 13(Suppl 1):33


July 2016

Research Article ǀ Open Access ǀ Heart Health, Blood Flow, Curcumin

Novel Form of Curcumin Improves Endothelial Function in Young, Healthy Individuals: A Double-Blind Placebo Controlled Study

(www.hindawi.com/journals/jnme/2016/1089653/)
Jonathan M. Oliver, Lee Stoner, David S. Rowlands, Aaron R. Caldwell, Elizabeth Sanders, Andreas Kreutzer, Joel B. Mitchell, Martin Purpura, Ralf Jäger
J Nutr Metab 2016, 2016:1089653.


July 2016

Research Article ǀ Open Access ǀ Gut Health, Probiotics, Sports Nutrition

Probiotic Bacillus coagulans GBI-30, 6086 Reduces Exercise-Induced Muscle Damage and Increases Recovery.

(https://peerj.com/articles/2276/)
Ralf Jäger, Kevin A. Shields, Ryan P. Lowery, Eduard O. De Souza, Jeremy M. Partl, Chase Hollmer, Martin Purpura, Jacob M. Wilson,
PeerJ 2016, 4:e2276.


December 2015

Poster Presentation ǀ Open Access ǀ Plant Protein, Digestive Enzymes, Bioavailability

Digestive enzymes reduce quality differences between plant and animal proteins: a double-blind crossover study

(https://link.springer.com/article/10.1186%2F1550-2783-12-S1-P26)
Julie Minevich, Mark A. Olsen, Joseph P. Mannion, Jaroslav H. Boublik, Josh O. McPherson, Ryan P. Lowery, Kevin Shields, Matthew Sharp, Eduardo O. De Souza, Jacob M. Wilson, Ralf Jäger
J Int Soc Sports Nutr 2015, 12:P26


July 2015

Review ǀ Open Access ǀ Muscle Health, Sports Nutrition, Beta-Alanine

International Society of Sports Nutrition Position Stand: Beta-Alanine.

(https://jissn.biomedcentral.com/articles/10.1186/s12970-015-0090-y)
Eric T. Trexler, Abbie E. Smith-Ryan, Jeffrey R. Stout, Jay R. Hoffman, Colin D. Wilborn, Craig Sale, Richard B. Kreider, Ralf Jäger, Conrad P. Earnest, Laurent Bannock, Bill I. Campbell, Doug S. Kalman, Tim. N. Ziegenfuss, Jose Antonio
J Int Soc Sports Nutr 2015, 13:20.


November 2014

Research Article ǀ Open Access ǀ Plant Protein, Rice Protein, Bioavailability

A Comparison of Blood Amino Acids Concentrations Following Ingestion of Rice and Whey Protein Isolate: A Double-Blind Crossover Study.

(http://www.annexpublishers.co/full-text/JNH/306/A-Comparison-of-Blood-Amino-Acid-Concentrations-Following-Ingestion-of-Rice-and-Whey-Protein-Isolate-A-Double-Blind-Crossover-Study.php)
Martin Purpura, Ryan P. Lowery, Jordan M. Joy, Eduard O. De Souza, Doug S. Kalman, Ralf Jäger, Jacob M. Wilson
J Nutr Health Sci 2014, 1(3):306.


June 2014

Research Article ǀ Open Access ǀ Muscle Health, Sports Nutrition, Phosphatidic Acid

Phosphatidic acid enhances mTOR signaling and resistance exercise induced hypertrophy.

(https://nutritionandmetabolism.biomedcentral.com/articles/10.1186/1743-7075-11-29)
Jordan M. Joy, David M. Gundermann, Ryan P. Lowery, Ralf Jäger, Sean A. McCleary, Martin Purpura, Michael D Roberts, Stephanie M.C. Wilson, Troy A Hornberger, Jacob M. Wilson
Nutr Metab (Lond). 2014 11:29.


June 2014

Research Article ǀ Open Access ǀ Heart Health, Blood Flow, ATP

Oral adenosine-5’-triphosphate (ATP) administration increases blood flow following exercise in animals and humans

(https://jissn.biomedcentral.com/articles/10.1186/1550-2783-11-28)
Ralf Jäger, Michael D. Roberts, Ryan P. Lowery, Jordan M. Joy, Clayton L. Cruthirds, Christopher M. Lockwood, John A. Rathmacher, Martin Purpura, Jacob M. Wilson
J Int Soc Sports Nutr 2014, 11:28.


February 2014

Research Article ǀ Open Access ǀ Creatine, Russian Tarragon, Muscle

Effects of short-term ingestion of Russian Tarragon prior to creatine monohydrate supplementation on whole body and muscle creatine retention and anaerobic sprint capacity: a preliminary investigation

(https://jissn.biomedcentral.com/articles/10.1186/1550-2783-11-6)
Jonathan M. Oliver, Andrew R Jagim, Ivo Pischel, Ralf Jäger, Martin Purpura, Adam Sanchez, James Fluckey, Steven Riechman, Michael Greenwood, Katherine Kelly, Cynthia Meininger, Christopher Rasmussen, Richard B. Kreider
J Int Soc Sports Nutr 2014, 11:6.


January 2014

Research Article ǀ Open Access ǀ Curcumin, Bioavailability

Comparative absorption of curcumin formulations

(https://nutritionj.biomedcentral.com/articles/10.1186/1475-2891-13-11)
Ralf Jäger, Ryan P Lowery, Allison V. Calvanese, Jordan M. Joy, Martin Purpura, Jacob M Wilson
Nutr J 2014, 13:11.


December 2013

Poster Presentation ǀ Open Access ǀ Phosphatidic Acid, Safety

Safety of soy-derived phosphatidic acid supplementation in healthy young males

(https://link.springer.com/article/10.1186%2F1550-2783-10-S1-P6)
Joshua E. Dudeck, Jordan M. Joy, Ryan P. Lowery, Eduardo O. De Souza, Ralf Jäger, Sean A. McCleary, Stephanie M.C. Wilson, Martin Purpura, Jacob M. Wilson
J Int Soc Sports Nutr 2013, 10:P6


June 2013

Research Article ǀ Open Access ǀ Muscle Health, Plant Protein, Sports Nutrition

The effects of 8 weeks of whey or rice protein supplementation on body composition and exercise performance

(https://nutritionj.biomedcentral.com/articles/10.1186/1475-2891-12-86)
Jordan M. Joy, Ryan P. Lowery, Jacob M. Wilson, Martin Purpura, Eduard O. De Souza, Stephanie M.C. Wilson, Douglas S. Kalman, Joshua E. Dudeck, Ralf Jäger
Nutr J 2013, 12:86.


May 2013

Poster Presentation ǀ Open Access ǀ Probiotics, Prebiotics, Synbiotics

Pro- and Prebiotic In Vitro Screening to Identify Potential Best-Match Synbiotics

(www.gastrojournal.org/article/S0016-5085(13)63345-4/pdf)
Ralf Jäger, Martin Purpura, Jeroen Kiers, Mark Olsen
Gastroenterology 2013, 144(5 Suppl 1):S-898


March 2013

Research Article ǀ Open Access ǀ ADHD, Phosphatidylserine, Cognition

The effect of phosphatidylserine administration on memory and symptoms of attention-deficit hyperactivity disorder: a randomised, double-blind, placebo-controlled clinical trial

deficit hyperactivity disorder: a randomised, doubleblind, placebocontrolled clinical trial (https://onlinelibrary.wiley.com/doi/abs/10.1111/jhn.12090)
Satoshi Hirayama, Koji Terasawa, Roland Rabeler, Takuma Hirayama, Toshitada Inoue, Yasuhisa Tatsumi, Martin Purpura, Ralf Jäger
J Hum Nutr Diet. 2013, Suppl 2:284-291


October 2012

Research Article ǀ Open Access ǀ Muscle Health, Sports Nutrition, Phosphatidic Acid

Efficacy of phosphatidic acid ingestion on lean body mass, muscle thickness and strength gains in resistance-trained men

(https://jissn.biomedcentral.com/articles/10.1186/1550-2783-9-47)
Jay R Hoffman, Jeffery R Stout, David R Williams, Adam J Wells, Maren S Fragala, Gerald T Mangine, Adam M Gonzalez, Nadia S Emerson, William P McCormack, Tyler C Scanlon, Martin Purpura, Ralf Jäger
J Int Soc Sports Nutr 2012, 9:47.


March 2011

Review ǀ Open Access ǀ Creatine, Safety, Sports Nutrition

Analysis of the efficacy, safety, and regulatory status of novel forms of creatine

(https://link.springer.com/article/10.1007%2Fs00726-011-0874-6)
Ralf Jäger, Martin Purpura, Andrew Shao, Toshitada Inoue, Richard B. Kreider
Amino Acids 2011, 40(5): 1169-1383.


December 2010

Research Article ǀ Open Access ǀ Brain Health, Cognition, Focus

The effects of acute and prolonged CRAM supplementation on reaction time and subjective measures of focus and alertness in healthy college students

(https://link.springer.com/article/10.1007%2Fs00726-011-0874-6)
Jay R. Hoffman, Nicholas A. Ratamess, Adam Gonzalez, Noah A. Beller, Mattan W. Hoffman, Mark Olson, Martin Purpura, Ralf Jäger
J Int Soc Sports Nutr 2010, 7:39.


September 2010

Poster Presentation ǀ Open Access ǀ Cognition, Sports Nutrition, Phosphatidylserine

The effects of phosphatidylserine supplementation on cognitive functioning prior and following an acute bout of resistance training in young males

(https://link.springer.com/article/10.1186%2F1550-2783-7-S1-P2)
Adam Parker, Josh Gordon, Aaron Thornton, John Lubker, Michelle Bartlett, Ralf Jäger, Martin Purpura, Mike Bird, Jonathan Oliver, Sunday Simbo, Chris Rasmussen, Richard B. Kreider
J Int Soc Sports Nutr 2010, 7:P2


September 2008

Poster Presentation ǀ Open Access ǀ Creatine, Russian Tarragon, Bioavailability

The effect of Russian Tarragon (Artemisia Dracunculus L.) on the plasma creatine concentration with creatine monohydrate administration

(https://link.springer.com/article/10.1186%2F1550-2783-5-S1-P4)
Ralf Jäger, Iain P. Kendrick, Martin Purpura, Roger C. Harris, David M. Ribnicky, Ivo Pischel
J Int Soc Sports Nutr 2008, 5:P4


September 2008

Poster Presentation ǀ Open Access ǀ Brain Health, L-Theanine, Mental Regeneration

Improving Mental Regeneration After Physical Exercise

(https://link.springer.com/article/10.1186%2F1550-2783-5-S1-P3)
Ralf Jäger, Martin Purpura, Kurt-Reiner Geiss, Thorsten Barthel, Reinhard Schnittker, Michael Weiß
J Int Soc Sports Nutr 2008, 5:P3


July 2008

Research Article ǀ Open Access ǀ Phosphatidylserine, Cortisol, Testosterone

The effect of phosphatidylserine on endocrine response to moderate intensity exercise

(https://jissn.biomedcentral.com/articles/10.1186/1550-2783-5-11)
Michael A. Starks, Stacy L. Starks, Michael Kingsley, Martin Purpura, Ralf Jäger
J Int Soc Sports Nutr 2008, 5:11


February 2008

Research Article ǀ Open Access ǀ Creatine Pyruvate, Creatine Citrate, Sports Nutrition

The effects of creatine pyruvate and creatine citrate on performance during high intensity exercise

(https://jissn.biomedcentral.com/articles/10.1186/1550-2783-5-4)
Ralf Jäger, Jan Metzger, Karin Lautmann, Vladimir Shushakov, Martin Purpura, Kurt-Reiner Geiss, Norbert Maassen
J Int Soc Sports Nutr 2008, 5:4


December 2007

Research Article ǀ Open Access ǀ Golf, Phosphatidylserine, Sports Nutrition

The effect of phosphatidylserine on golf performance

(https://jissn.biomedcentral.com/articles/10.1186/1550-2783-4-23)
Ralf Jäger, Martin Purpura, Kurt-Reiner Geiss, Michael Weiß, Jochen Baumeister, Francesco Amatulli, Lars Schröder, Holger Herwegen
J Int Soc Sports Nutr 2007, 4:23


November 2007

Research Article ǀ Open Access ǀ Creatine, Bioavailability

Comparison of new forms of creatine in raising plasma creatine levels

(https://jissn.biomedcentral.com/articles/10.1186/1550-2783-4-17)
Ralf Jäger, Roger C. Harris, Martin Purpura, Marc Francaux
J Int Soc Sports Nutr 2007, 4:17


July 2007

Review ǀ Open Access ǀ Phospholipids, Sports Nutrition

Phospholipids and sports performance

(https://jissn.biomedcentral.com/articles/10.1186/1550-2783-4-5)
Ralf Jäger, Martin Purpura, Michael Kingsley
J Int Soc Sports Nutr 2007, 4:5