📰 The Natural Living Newsletter December 2025

Stay informed. Stay grounded. Stay real.

Hi,
I’m Dr. Andres Digenio. As we close out 2025, I want to thank every reader of this newsletter — whether you joined recently or have been with me from the beginning. Your curiosity, your questions, and your commitment to understanding what truly shapes our health have guided this work all year long.

This final issue of the year brings together some of the most important research published this fall — evidence that sharpens our understanding of how ultra-processed foods affect metabolism, cardiovascular health, inflammation, and long-term disease risk. My hope is that these insights help you enter the new year with clarity, confidence, and a renewed focus on the patterns that matter most: more real food, fewer engineered formulations, and habits that support you rather than work against you.

Below you’ll find December’s key takeaways, written to help you start 2026 on more grounded nutritional footing.

Ultra-Processed Foods and Type 2 Diabetes — What the Evidence Really Shows

A new synthesis of large cohort studies reveals a consistent, troubling pattern: people who consume the highest amounts of ultra-processed foods face a significantly greater risk of developing type 2 diabetes — even after accounting for physical activity, body weight, and overall diet quality.

This increased risk isn’t simply about sugar or calories. It reflects the engineered structure of ultra-processed foods: refined starches, emulsifiers, flavor systems, and textures that interfere with normal glucose regulation. These foods are designed for speed and ease of consumption, and our biology responds in predictable ways.

🔗 Read the article

Ultra-Processed Foods and Cancer — Signals That Are Hard to Ignore

Recent studies from Europe, North America, and Asia are all pointing in the same direction: people who eat more ultra-processed foods tend to have higher rates of several cancers, even when researchers adjust for smoking, exercise, weight, and overall diet quality.

The strongest signals have appeared in:

Colorectal cancer
Breast cancer
Pancreatic cancer
Cancers linked to obesity

These studies do not prove that UPFs cause cancer, but the pattern is remarkably consistent across countries and age groups. The takeaway is simple: diets lower in ultra-processed foods — and higher in real, minimally processed foods — are linked to lower cancer risk over time.

🔗 Read the article

Ultra-Processed Foods and Cardiovascular Disease — The Hidden Pathways

Cardiovascular disease remains the leading cause of death worldwide. A growing body of research now links UPFs to hypertension, dyslipidemia, systemic inflammation, and higher rates of cardiovascular events.

What stands out is that these effects often appear independently of calorie intake. Even when total calories or macronutrients are held constant, ultra-processed foods alter physiological pathways involved in vascular health.

This isn’t about demonizing individual nutrients — it’s about understanding how engineered foods interact with the cardiovascular system as a whole.

🔗 Read the article

Mechanisms That Link UPFs to Early Death, CVD, Cancer & Type 2 Diabetes — A Comprehensive Review

A growing number of studies now show that ultra-processed foods (UPFs) affect the body in ways that go far beyond sugar, salt, or fat. The issue isn’t just what they contain — it’s how they are made. Processing changes the food’s structure, how quickly we absorb it, and how it interacts with the gut, metabolism, and brain.

Here’s what researchers believe is happening:

They’re absorbed too fast.
Because UPFs are ground, milled, puffed, or reassembled, the body digests them almost instantly. That leads to quick blood-sugar spikes, weaker fullness signals, and faster eating.
They may disturb the gut.
Certain additives — especially emulsifiers and some sweeteners — can irritate or disrupt the gut bacteria that help regulate inflammation and metabolism.
They introduce small exposures we don’t see.
Industrial cooking creates new compounds, and packaging can release tiny amounts of chemicals. These exposures are small but constant in people who eat a lot of UPFs.
They’re built for nonstop cravings.
UPFs are engineered for “perfect” taste and mouthfeel, which strongly activates reward pathways and encourages overeating.
They replace the foods that protect us.
The more UPFs in the diet, the less room there is for fruits, vegetables, beans, nuts, and whole grains — foods that support gut health, reduce inflammation, and stabilize metabolism.

🔗 Read the full article

Reader Favorites — Five Practical Plays for December

These five strategies resonated most with readers this month — practical adjustments that help keep real food at the center of daily life, even during the holidays.

1. The “Two Real-Food Meals” Guideline

Instead of aiming for perfection, ground your day by ensuring that at least two meals are built entirely from real foods. This single shift stabilizes appetite, reduces UPF reliance, and prevents the “holiday slide” from turning into a full reset.

2. Replace the Snack, Not the Tradition

Holiday tables make UPF snacking almost automatic. Rather than fighting it, offer a substitution: nuts, fruit, olives, or simple cheeses. When healthier options are equally convenient, the entire pattern changes.

3. Make Protein the First Decision of the Meal

Starting a meal by selecting a real-food protein source (beans, eggs, poultry, fish, lentils, tofu) creates a natural anchor. Everything built around it tends to be simpler, more satisfying, and less reliant on processed foods.

4. Use One “Reset Meal” After Travel or Events

After a rich dinner, social gathering, or long flight, choose the same simple, restorative meal every time — for example, oats with fruit, vegetable soup, or eggs with greens. A consistent reset strategy prevents one indulgence from becoming a multi-day pattern.

5. Lean on “Assembly Meals” Rather Than Recipes

When life gets busy, the goal is momentum, not perfection. Assembly meals — bowls, wraps, roasted vegetables + protein, yogurt + fruit — reduce dependence on packaged foods by keeping preparation simple and sustainable.

These aren’t resolutions. They’re practical defaults that carry you through stressful or celebratory periods without relying on engineered foods designed for speed and overeating.

Looking Ahead — A Healthier Start to the New Year

As this year ends, I want to express my appreciation for your support and your willingness to engage with what we’re really eating. The science continues to evolve, but the message remains steady: real food, eaten simply and consistently, is the foundation for long-term health.

In short:
Ultra-processed foods add stressors and remove protectors. Even small shifts — replacing just 10–20% of your daily intake with real, minimally processed foods — can meaningfully improve metabolic health. And remember: people don’t overeat UPFs because they lack discipline. These products are engineered to override the body’s natural “fullness” signals. Real foods do the opposite — they slow us down, satisfy us sooner, and help restore metabolic balance.

As we move into a new year, this is the perfect moment to take one small step toward a healthier 2026.

🎁 My New Year’s gift to you:

The UPF Detector — a simple, practical tool that helps you quickly recognize ultra-processed foods and build better habits at the grocery store and at home.
👉 Download it here: https://www.andresdigenio.com/upf-detector

My wish for you in the coming year is clarity in your choices, patience with your habits, and confidence in the small, steady steps that move you toward better health.

Thank you for being part of this community — and for helping grow the real-food movement, one person at a time.

To real food,
Dr. Andres Digenio
Physician • Author of The Natural Diet (February 2026)

📬 Subscribe to receive The Natural Living Newsletter during the first 5 days of each month:
https://www.andresdigenio.com/newsletter