April Stull, Ph.D., R.D.

Assistant Professor-Research

Diabetes and Nutrition
(225) 763-2731
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Ph.D., Nutrition Science, Purdue University, West Lafayette, IN (2007)

Dietetic Internship, Southern University and A&M College, Baton Rouge, LA (2002)

B.S., Dietetics, Southern University and A&M College, Baton Rouge, LA (2001)


Dr. Stull has a research background in clinical nutrition interventions and glucose metabolism with a focus in botanicals and their impact on improving type 2 diabetes and cardiovascular disease risk factors (i.e., metabolic syndrome). Dr. Stull's approach to human research is truly translational, spanning from clinical trials to cellular mechanisms. Her research focuses on 1) the potential therapeutic benefits of botanicals on type 2 diabetes and cardiovascular disease risk factors and 2) the role of botanicals in restoring insulin sensitivity at the cellular level. Specifically, Dr. Stull's lab has found that consuming bioactives in blueberries for 6 weeks improved insulin sensitivity (Journal of Nutrition, 2010) and endothelial function (Nutrients, 2015) in an obese population with pre-diabetes and hypertension. We used the “gold standard” hyperinsulinemic-euglycemic clamp to access insulin sensitivity and EndoPAT technology to access endothelial function. Dr. Stull's research is funded by the National Institutes of Health, National Center for Complementary and Integrative Health.


Stull AJ, Cash KC, Champagne CM, Gupta AK, Boston R, Beyl RA, Johnson WD, Cefalu WT (2015). Blueberries improve endothelial function, but not blood pressure, in adults with metabolic syndrome: a randomized, double-blind, placebo-controlled clinical trial. Nutrients, 7(6): 4107-23. PMCID: PMC4488775

Stull AJ and Ciappio ED. Successful scientist: What’s the winning formula? (2014). Adv Nutr, 5: 795-796. PMCID: PMC4224218

Stull AJ. Lifestyle approaches and glucose intolerance (2014). Am J Lifestyle Med, DOI: 10.1177/1559827614554186

Gupta AK, Ravussin E, Johannsen DL, Stull AJ, Cefalu WT, Johnson WD (2012). Endothelial dysfunction: an early cardiovascular risk marker in asymptomatic obese individuals with prediabetes. Br J Med Med Res, 2(3): 413-423. PMCID: PMC3419538

Stull AJ, Wang ZQ, Zhang XH, Yu Y, Johnson WD, Cefalu WT (2012). Skeletal muscle protein tyrosine phosphatase 1B regulates insulin sensitivity in African Americans. Diabetes, 61: 1-8. PMCID: PMC3357297

Stull AJ, Cash KC, Johnson WD, Champagne CM, Cefalu WT (2010). Bioactives in blueberries improve insulin sensitivity in obese, insulin-resistant men and women. J Nutr, 140: 1764-1768. PMCID: PMC3139238

Stull AJ, Galgani JE, Johnson WD, Cefalu, WT (2010). The contribution of race and diabetes status to metabolic flexibility in humans. Metabolism, 59: 1358-1364. PMCID: PMC4240223

Stull AJ, Wood KV, Thyfault JP, Campbell WW (2009). Effects of acute pinitol supplementation on plasma pinitol concentration, whole body glucose tolerance, and activation of the skeletal muscle insulin receptor in older humans. Horm Metab Res, 41:381-386. PMCID: PMC4562028

Stull AJ, Thyfault JP, Haub MD, Ostlund RE Jr, Campbell WW (2008). Relationships between urinary inositol excretions and whole body glucose tolerance and skeletal muscle insulin receptor phosphorylation. Metabolism, 57:1545-1551. PMCID: PMC3469253

Stull AJ, Apolzan JW, Thalacker-Mercer AE, Iglay HB, Campbell WW (2008). Liquid and solid meal replacement products differentially affect postprandial appetite and food intake in older humans. J Am Diet Assoc, 108:1226-1230. PMCID: PMC2556245

Tieken SM, Leidy HJ, Stull AJ, Mattes RD, Schuster RA, Campbell WW (2007). Effects of solid vs. liquid meal-replacement products of similar energy content on hunger, satiety, and appetite-regulating hormones in older adults. Horm Metab Res, 39: 389-394. PMCID: PMC2197163

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