Fiber: The Most Underrated Nutrient for Your Health

In the Midst of the Internet's Protein-Forward Agenda…

With experts on almost every podcast emphasizing the importance of hitting high protein targets, I consistently hear recommendations like 1 to 1.2 grams per pound of bodyweight. For context, this would mean a 130-pound female would need to consume at least 130 grams of protein daily.

Here’s my concern - at least from what the nutrition literature shows. Consuming a diet that high in protein can end up crowding out room in one’s caloric budget for plant-based fiber sources. We know, from decades of research on dietary patterns like the Mediterranean diet, that fruits, vegetables, nuts, and seeds are foundational in providing our gut microbiome with the prebiotics needed to maintain homeostasis - not to mention their role in supplying antioxidants and polyphenols that support overall health. Because fiber bypasses digestion, it acts as a “broom” in the digestive system, binding stool together and supporting elimination.

Types of Fiber:

Soluble fiber draws water from food matter, assisting in stool formation in the colon. As these fibers absorb water, they expand – stimulating peristalsis, the contraction and relaxation of the intestinal tract that moves stool for excretion. Soluble fibers are prebiotic foods, meaning they are fermentable and aid in good gut bacteria balance.¹

• High soluble fiber foods:

  • Grains: oats, barley

  • Legumes: beans, lentils

  • Fruits: apples, bananas

  • Cruciferous vegetables: broccoli, Brussels sprouts

Insoluble fiber, unlike soluble fiber, does not draw in water, which speeds up transit time. Insoluble fiber is essential for normal bowel function for this reason.¹

• High insoluble fiber foods:

  • Grains: wheat, brown rice, quinoa

  • Green vegetables: leafy greens, green beans

  • Nuts and seeds: flaxseed

Note: Most "fiber-rich" foods contain a mix of both soluble and insoluble fiber.

Recommended Total Fiber Intake (g/day)¹

Age	Female	Male
9-13	26g	31g
14-18	26g	38g
19-50	25g	38g
50+	21g	30g

The Fiber and Metabolic Disease Connection

Fiber slows the progression of type 2 diabetes for two main reasons: lowering LDL cholesterol and managing blood glucose. The binding effect of specific soluble fibers, like mucilages, pulls out cholesterol. Mucilages become gel-like as they absorb water, slowing food digestion and the release of glucose into the blood.² This is why fiber benefits those with metabolic dysfunction, which includes elevated blood sugar or cholesterol. Additionally, fiber delays gastric emptying, promoting satiety and lowering overall caloric intake.²

Why Whole Food Fiber is Better than Supplements

While fiber supplements can have their place, relying solely on them isn’t ideal. Whole food sources of fiber act as better prebiotics for gut health, providing not just fiber but also vitamins, minerals, and plant compounds that nourish your microbiome. Supplements lack these additional benefits and can contribute to bloating or discomfort if overused.

Simple Low-Bloat Fiber Breakfasts: To start the day strong

Here are some easy, gentle-on-the-gut ways to increase fiber without discomfort:

• Chia seed pudding (soaked chia seeds with milk of choice, cinnamon, and berries)

• Oatmeal pancakes (blended oats, egg, and banana cooked into pancakes)

• Berries with fiber-rich granola (Homemade fiber granola, or look for low-added-sugar options)

• Oatmeal (cooked oats with ground flaxseed and blueberries)

For a more extensive list of fiber-rich foods, check out this Mayo Clinic High-Fiber Foods Chart.

My Take on the Protein Obsession

If you’re following these internet recommendations to eat 1 gram of protein per pound of bodyweight - and you’re not feeling your best - I just want to remind you: it’s okay to question it. This isn’t the only way to eat, and it might not be the best way for you. Aesthetics aren’t everything. We have our long-term health to consider - and honestly, to prioritize.

The real work is learning to trust your body's signs and symtpoms. If you feel good following certain reccomendations - that may be more aligned with what your body needs at this point in time. Also understand that our needs change throughout certain phases, what works for you now may change in 5 or 10 years. There is no "one size fits all", however, there are nutrition guidelines based on solid research. The connection between fiber intake and metabolic health is real. It’s not just a theory.

-McKaylee Roth