We build on published research, and we show our work. Here is the literature behind each formula, grouped by product, so you can read it yourself.
Creatine monohydrate, studied for lean mass, strength and healthy aging.
Kreider RB, Kalman DS, Antonio J, et al. — ISSN Position Stand
J. Int. Soc. Sports Nutr., 2017
View source →Chilibeck PD, Kaviani M, Candow DG, Zello GA — meta-analysis, 22 studies
Open Access J. Sports Med., 2017
View source →Smith-Ryan AE, DelBiondo GM, Brown AF, et al.
J. Int. Soc. Sports Nutr., 2025
View source →Neeland IJ, Linge J, Birkenfeld AL
Diabetes Obes. Metab., 2024
View source →Wilding JPH, Batterham RL, Calanna S, et al.
N. Engl. J. Med., 2021
View source →Hydrolyzed collagen peptides, studied for skin, and joint comfort.
de Miranda RB, et al. — meta-analysis
Int. J. Dermatol., 2021
View source →Proksch E, et al. — randomized controlled trial
Skin Pharmacol. Physiol., 2014
View source →Clark KL, et al. — randomized controlled trial
Curr. Med. Res. Opin., 2008
View source →The B-vitamins, iron and nutrients that fuel your energy, plus botanicals and probiotics for easy digestion.
Urbina J, Salinas-Ruiz LE, Valenciano C, Clapp B — narrative review
Clinical Obesity, 2026
View source →Viljoen E, et al. — meta-analysis
Nutrition Journal, 2014
Published citationChen L, et al. — meta-analysis of randomized trials
Int. J. of Surgery, 2023
Published citationter Borg S, et al. — systematic review
British J. of Nutrition, 2015
Published citationL-glutamine, the primary fuel for the cells that line the gut.
Kim MH, Kim H — review
Int. J. of Molecular Sciences, 2017
Published citationWindmueller HG, Spaeth AE — foundational study
J. of Biological Chemistry, 1978
Published citationRao R, Samak G — review
J. of Epithelial Biology & Pharmacology, 2012
Published citationThese studies describe how ingredients like creatine, collagen, ginger and glutamine behave in published trials and reviews. They are not claims that KeptStrong products treat, cure or prevent any disease, or act on any medication. Where the evidence is a range, we say so, and we pair muscle and strength research with the resistance training that makes it work.
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Individual results vary.
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