Angela Pifer, MS, CN | Scientific Advisory Board – Physician's Choice
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Scientific Advisory Board

Angela Pifer, MS, CN

Functional Medicine Nutritionist

Angela Pifer is a Washington State Certified Nutritionist with a master's degree in nutrition science from Bastyr University. She has spent more than 20 years in practice as a functional medicine nutritionist focused on digestive health.

  • Digestive health
  • Functional gut disorders
  • SIBO
  • Food-first nutrition
Read the full profile
Angela Pifer, MS, CN
Board memberPhysician's Choice Scientific Advisory Board
Credential
Certified Nutritionist, Washington State, since 2005
Education
MS, Nutrition Science, Bastyr University
Practice
Owner, SIBO Guru
Experience
In practice since 2005

About Angela Pifer

Angela Pifer, MS, CN, is a functional medicine nutritionist and the owner of SIBO Guru, a private practice centered on digestive health. She works with clients across the US and abroad by video consult, with a focus on functional gut disorders, SIBO, thyroid and autoimmune health.

She holds a BS in psychology and an MS in nutrition science from Bastyr University, and she has held Washington State's Certified Nutritionist credential since 2005. She has taught at Bastyr University and mentors nutrition and dietetics students.

Her continuing education stays on the gut. In 2024 it included a gut health course certification from the Kharrazian Institute and Digestive Disease Week. In 2016 she founded Simply SIBO, a recipe subscription that helps people with functional gut disorders widen overly restrictive diets.

She speaks on gut health at professional events and on podcasts, including A4M in 2025 and the OneMedicine Podcast episode Beyond Bugs: What Chronic Bloating Is Really Telling Us.

Angela Pifer is a member of the Physician's Choice Scientific Advisory Board.

Training and credentials

  1. BS, PsychologyBastyr University
  2. 2005MS, Nutrition ScienceBastyr University
  3. 2005Certified NutritionistWashington State Department of Health
  4. 2024Gut health course certificationKharrazian Institute

Talks and interviews

When my patients are bloated, I tell them to reach for Physician's Choice Digestive Enzymes. I can count on their unique mix of 16 enzymes, probiotics, and soothing botanicals.

Angela Pifer, MS, CNOn Digestive Enzymes

See Digestive Enzymes

Angela Pifer is a member of the Physician's Choice Scientific Advisory Board.

With Physician's Choice

Part of the team behind our formulas

Physician's Choice formulas are developed in collaboration with our Scientific Advisory Board, a team of doctors, researchers and health professionals across six specialties.

The board meets quarterly.

Scientific Advisory Board

Meet the rest of the board

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Sources for this profile (7)
  1. doh.wa.gov: https://doh.wa.gov/licenses-permits-and-certificates/provider-credential-or-facility-search
  2. siboguru.com: https://siboguru.com/about/
  3. siboguru.com: https://siboguru.com/
  4. onemedicinepodcast.transistor.fm: https://onemedicinepodcast.transistor.fm/episodes/beyond-bugs-what-chronic-bloating-is-really-telling-us
  5. Physician's Choice: https://physicianschoice.com/pages/physicians-choice-scientific-advisory-board
  6. vibrantwellnesspodcast.buzzsprout.com: https://vibrantwellnesspodcast.buzzsprout.com/2139049/episodes/19660084-the-root-causes-of-sibo-and-chronic-gut-issues-angela-pifer-fmn
  7. healthhappinesshumankind.podbean.com: https://healthhappinesshumankind.podbean.com/e/rfr-163-the-root-causes-of-sibo-the-influence-of-food-fears-stress-anxiety-with-angela-pifer-sibo-guru/

Facts on this page were checked against the sources listed above on October 21, 2026.