FIBER: THE MOST UNDERRATED NUTRIENT IN YOUR GUT’S TOOLKIT
- jessicadoyleh
- Jun 16
- 3 min read
Updated: Jun 19

Let’s talk powders, P\poop, and the difference between a gentle sweep and a brick in your colon. Fiber is the unsexy hero of digestion. It doesn’t get the fame of protein or the glamor of collagen, but trust me, it’s the backstage pass to glowing skin, better blood sugar, balanced hormones, and bowel movements that deserve applause. Whether you're sipping on psyllium or stirring acacia into your morning matcha, fiber supplements can help, or wreck the gut depending on your body.
Let’s break it down like a blender full of flax.
FIBER 101: SOLUBLE VS. INSOLUBLE
Two kinds. Different jobs. Both essential.
SOLUBLE FIBER
What it does:
Forms a gel-like substance in your gut
Slows digestion (good for blood sugar + satiety)
Feeds beneficial gut bacteria (prebiotic effect)
Helps lower LDL cholesterol and regulate blood pressure
Found in:
Oats, apples, chia, flax, psyllium, beans, acacia fiber
Great for:
People with diarrhea or blood sugar spikes
Heart health and cholesterol issues
Feeding friendly gut bacteria
INSOLUBLE FIBER
What it does:
Adds bulk to stool and speeds up transit
Sweeps your intestines like a broom
Supports detox and regularity
Found in:
Veggie skins, whole grains, seeds, leafy greens, cellulose-based supplements
Great for:
Constipation-prone folks
Detoxifying waste more efficiently
DAILY DOSE: HOW MUCH FIBER DO YOU ACTUALLY NEED?
Women: 25-28g/day
Men: 30-38g/day
Average North American intake? A sad 10-15g/day
Ideal balance: Roughly 1/3 soluble and 2/3 insoluble fiber, though this varies depending on gut issues.
FIBER SUPPLEMENTS: THE GOOD, THE BAD, AND THE BLOATED
PROS:
Easy to add into smoothies, shakes, or baked goods
Can improve satiety and reduce sugar cravings
Supports blood sugar balance, heart health, and cholesterol
Helps with constipation, loose stools, and bloating when used correctly
CONS:
Can cause bloating, gas, or cramping if introduced too quickly
Some are high FODMAPs (bad for SIBO/IBS/blood sugar issues)
May bind to medications if taken at the same time
Not all fibers are created equal; some feed the wrong gut bugs
WHO SHOULD BE CAUTIOUS OR AVOID CERTAIN FIBERS
SIBO (Small Intestinal Bacterial Overgrowth)
Avoid inulin, chicory root, and high-FODMAP fibers
Better options: Partially hydrolyzed guar gum (PHGG), acacia fiber, or a low-dose of psyllium husk
Start very slowly; fiber can feed the overgrowth if your treatment isn't complete
Celiac Disease
Stick with gluten-free certified fibers only (watch for oats, wheat dextrin)
Flax, chia, acacia, psyllium = usually safe. Some fiber bars and powders contain hidden gluten or cross-contamination
IBS (Irritable Bowel Syndrome)
Soluble fiber (especially acacia, psyllium, PHGG) can soothe symptoms
Insoluble fiber in excess can trigger gas, bloating, urgency
Go low and slow, and avoid “colon cleanses” like the plague
Candida Overgrowth
Avoid fiber sources high in sugar or starch (like banana flour or prebiotic blends with sugar)
Opt for insulin-balancing fibers like psyllium and acacia
Fiber can help starve Candida or feed it, depending on what else is going on
TYPES OF FIBER SUPPLEMENTS: CHOOSE YOUR WEAPON WISELY
Fiber Type | Soluble? | Best For | Watch Out For |
Psyllium Husk | ✅ | Constipation, blood sugar, cholesterol | Can bloat or bind if not enough water |
Acacia Fiber | ✅ | IBS, SIBO, gentle gut support | Takes time to build up |
PHGG (Sunfiber) | ✅ | IBS-D, SIBO, slow transit | Mild but pricey |
Inulin/Chicory Root | ✅ | Feeding gut bugs | High FODMAP; gas city |
Flaxseed (ground) | Combo | Hormones, constipation, omega-3s | Must grind fresh or refrigerate |
Chia Seeds | Combo | Satiety, hydration | Can gel up too fast; choking risk if dry |
Wheat Dextrin (e.g. Benefiber) | Mostly soluble | Easy to mix | Not gluten-free unless specified |
Cellulose | ❌ | Adding bulk | Doesn't feed gut flora; pure broom action |
OTHER BENEFITS OF FIBER YOU NEVER THINK ABOUT
Hormone Balance: Binds to estrogen and helps excrete excess
Liver Detox: Helps remove waste and bile by-products
Skin Health: Less gut inflammation = less acne and eczema
Mood: Gut bacteria love fiber, and your mood loves gut bacteria
Blood Pressure: High-fiber diets are linked to improved heart health and lower blood pressure
PRO TIPS FOR USING FIBER LIKE A GUT GENIUS
Start slow. Always. One teaspoon at a time.
Hydrate like hell. Fiber without water is just intestinal concrete.
Cycle different types. Your gut thrives on variety.
Avoid bedtime doses. Your digestion slows down at night, take it earlier in the day.
Read the labels. Watch for artificial sweeteners, gums, and FODMAP triggers.
Fiber isn’t just about staying regular, it’s about feeding your gut, balancing your hormones, managing blood sugar, and protecting your heart. But the wrong type (or too much, too fast) can lead to gas, cramps, and a one-way ticket to the bathroom floor.
Choose your fiber like you choose your friends: supportive, low drama, and good for your gut.
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