for people ages 18-50 (full criteria)
Healthy Volunteers
healthy people welcome
at UC Davis
study started
estimated completion
Principal Investigator
by Jean Debedat (ucdavis)Sean H Adams, PhD (ucdavis)



This project will address the notion that "healthy" lipids such as monounsaturated fatty acids in almonds can be used by the bacteria living in our gut to generate "new" molecules with potentially interesting health properties. This metabolite pattern is anticipated to differ significantly when compared to non-almond foods rich in saturated fats.

Official Title

HULA Study - Healthy Unique Lipids From Almonds


Nutrition, Healthy, microbiome, cyclopropane, nutrition, unsaturated, fatty acids, Almonds, Coconut


You can join if…

Open to people ages 18-50

  • Men and women
  • 18 to 50 years of age
  • Body mass index (BMI) categorized "normal" through "overweight" (18.5 - 29.9 kg/m2)
  • Able to provide informed consent in English

You CAN'T join if...

  • pregnancy or lactation
  • allergy or aversion to any of the foods that will be studied and/or provided
  • history of gastrointestinal disorders including ulcerative colitis, Crohn's disease, celiac sprue, hereditary non-polyposis colorectal cancer (HNPCC), familial adenomatous polyposis, pancreatic disease, or liver disease
  • history of metabolic diseases (type 2 diabetes, hyperlipidemia)
  • previous gastrointestinal resection or bariatric surgery
  • bleeding disorders that preclude blood draws
  • recent hospital admissions (past 6 months) for heart disease (MI/CVA or CHF) or other CVD/CAD conditions under physician guided therapy that is not medically stable
  • cancer under radiation or chemotherapy treatment that is active or within 6 months of treatment
  • regular alcohol intake of > 2 drinks/day (equivalent to 720 mL of beer, 240 mL of wine, or 90 mL of spirits) and unwilling to abstain during the run-in week and test day
  • use of tobacco and/or marijuana, hookahs, e-cigarettes (e-cigs, vapes, etc.) and not willing to abstain during the run-in week and test day
  • use of illicit drugs and not willing to abstain during the run-in week and test day
  • BMI ≥30 kg/m2
  • regular (daily to weekly) use of over the counter (OTC) weight-loss aids, anti-acids or anti-inflammatories, and unwilling or unable to stop taking during the run-in week and test day
  • regular OTC dietary supplements that interfere with the test foods being studied including pills, chewables, liquids or powders for the following: fiber, fish oil (including cod liver oil), probiotics, and unwilling or unable to stop taking during the run-in week and test day
  • oral or IV antibiotic use in the past 6 months (could defer participation until 6 months post-completion of course of antibiotics)
  • seated blood pressure >140/90 mmHg
  • fasting clinical lab tests outside acceptable values as ascertained at the screening blood draw (Glucose (fasting), Urea, Creatinine, eGFR, Sodium, ALT/GPT, AST/GOT, Alk Phos, Total Bilirubin, Total protein, Albumin, Complete blood count, hematocrit, Total Cholesterol, HDL/LDL cholesterol, Triglycerides, Insulin Free, Total Insulin, Hemoglobin A1C)
  • current use of specific prescription medication(s): Coumadin, Opiates within 1 month of study, Chlorthalidone, Canagliflozin, Tetracycline, Heparin, Anti-psychotics, Chlorothiazide, Dapagliflozin, Cephalosporin, Eliquis, Lithium, Hydrochlorothiazide, Empagliflozin, Penicillin, Indapamide, Insulin, Quinolone, Metolazone, Acarbose, Lincomycin, Oral Steroids within 1 month of study, Cholestyramine, Amiloride hydrochloride, Miglitol, Macrolide, RA / psoriasis medications, Colesevelam, Spironolactone, Liraglutide, Sulfonamide, Medications for rheumatologic / hematologic active disease, Colestipol, Triamterene, Metformin, Glycopeptide Abs, Ezetimibe, Furosemide, Aminoglycosides, Fenofibrate, Bumetanide, HIV/HAART therapy, Statins, Proton-pump inhibitors
  • inability to freely give informed consent in English


  • University of California Davis accepting new patients
    Sacramento California 95817 United States

Lead Scientists at University of California Health


accepting new patients
Start Date
Completion Date
University of California, Davis
Study Type
Expecting 20 study participants
Last Updated