Nutrition Sources and Citations

Gutts is a gut health tracking app designed to help you better understand your digestion. It offers insights into how different foods, habits, and lifestyle factors may affect your gut, but it is not meant for diagnosing, treating, or preventing any medical conditions, as it is not a medical device or app.

We do not provide guidance for individuals with specific medical needs, such as severe food allergies, eating disorders, or chronic digestive diseases, regarding any treatment. For medical advice or treatment, always consult with a qualified healthcare professional before making health-related decisions.

The goal of the Gutts app is to educate you about the factors that influence your digestion, highlight patterns, and gently encourage healthier eating and lifestyle habits to support your gut.

Gutts is built on trusted, evidence-based research in nutrition and gastroenterology. We don’t just guess — our insights are informed by peer-reviewed studies, medical institutions, and leading health organizations. Below are some of the key sources we reference when generating your gut health feedback.

Our app is based on publicly available information from the sources listed below, and it is not affiliated with or endorsed by them.

Fiber & Prebiotics

• Harvard T.H. Chan – Fiber and Health

• Mayo Clinic – Fiber: Essential for Gut Health

• Academy of Nutrition & Dietetics – Whole Grains

• Fu et al., 2022 – Fiber Intake & Gut Microbiota

• So et al., 2018 – Fiber Meta-analysis

• Veronese et al., 2018 – Fiber & Health Outcomes

• Rodríguez et al., 2024 – Short-term Fiber Effects

Ultra-Processed Foods & Additives

• American Gastroenterological Association – Bloating Guidance

• Brichacek et al., 2024 – UPFs & Gut Microbiome

• Whelan et al., 2024 – UPFs in Gut Health

• Lane et al., 2024 – UPFs & Health (BMJ)

• Atzeni et al., 2022 – UPFs & Microbiota

Fats & Protein

• Johns Hopkins Medicine – High-Fat Meals

• Daley et al., 2010 – Grass-Fed Beef Omega-3s

Fermented & Probiotics

• Cleveland Clinic – Fermented Foods

• Mayo Clinic – Probiotics & Prebiotics

• WebMD – Probiotics Overview

Lifestyle & Holistic Gut Health

• NIH News in Health – Keeping Your Gut in Check

• Cleveland Clinic – Improve Digestion Naturally

• Harvard Health – Feed Your Gut

• Harvard Health – Fiber & Fermented Foods

Fasting & Gut Health

• Hu et al., 2023 – Intermittent fasting modulates the intestinal microbiota

• Maifeld et al., 2021 – Fasting alters the gut microbiome & SCFA metabolism

• Saglam et al., 2023 – Ramadan intermittent fasting reshapes the gut microbiome

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