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7 Reasons Women In Perimenopause Depend on Core Fiber
“I felt like my body suddenly stopped responding to everything I was doing… until I fixed this one thing.”
7 Reasons Women In Perimenopause Depend on Core Fiber
Promotes Regular, Comfortable Digestion (Without the Bloat)
1
Promotes Regular, Comfortable Digestion (Without the Bloat)
Your digestion is one of the first things to change during perimenopause. Hormonal shifts can slow everything down — leading to:

- Constipation
- Gas and bloating
- Feeling heavy or puffy

With 6g of diverse, prebiotic fiber that mirrors what you’d find in a whole foods diet, Core Fiber helps restore consistent, easy bowel movements by supporting your gut — not acting like a harsh, quick-fix laxative.
Reduces Sugar Cravings & Supports Appetite Control
2
Reduces Sugar Cravings & Supports Appetite Control
As you go through perimenopause, your body becomes more sensitive to blood sugar swings. When blood sugar spikes and crashes, it can cause cravings, fatigue, inflammation, and make it much easier to store fat.

Soluble fibers like beta glucan help reduce sudden cravings and keep you fuller longer, while gently-fermenting fibers like acacia and chicory root inulin help support a healthy metabolism.
Clearer Skin & Better Hormone Detox
3
Clearer Skin & Better Hormone Detox
Your body clears excess estrogen through your digestive system – not your liver alone. If you’re not pooping 1-3 times per day, those hormones can be reabsorbed — contributing to breakouts, dull skin, and hormonal imbalances

By supporting regular digestion and gut health, Core Fiber helps your body eliminate what it doesn’t need — not recycle it.
Supports Stable Mood & Emotional Balance
4
Supports Stable Mood & Emotional Balance
During perimenopause, your body is constantly processing fluctuating hormones like estrogen and progesterone. Many women notice they feel more:

- Irritable
- Anxious
- Emotionally “off”

Insoluble fiber helps support daily bowel movements, which is essential for preventing your body from reabsorbing excess estrogen. 

Resistant starch feeds the key gut bacteria involved in your body’s handling and clearing of hormones, which influence how you feel day-to-day.
Promotes Steady Energy & Focus Throughout the Day
5
Promotes Steady Energy & Focus Throughout the Day
As hormones shift, blood sugar and insulin become harder to regulate. 

Soluble fibers like acacia and beta glucan help smooth out those spikes and crashes so you have:

- More consistent energy
- Better focus
- Fewer dips throughout the day
Long-Term Heart Health
6
Long-Term Heart Health
As estrogen declines, cholesterol levels tend to rise. That’s why heart health becomes especially important as women move into their 40s.

Viscous, gel-forming fibers like oat beta glucan help trap and remove excess cholesterol from the body, which can lower LDL levels and support cardiovascular health over time.
A Stronger Gut Improves Everything Else
7
A Stronger Gut Improves Everything Else
Fiber isn’t just about what happens in the bathroom. The right type of fiber should feed your gut microbiome – which influences metabolism, inflammation, immune function, and overall resilience.

Our gut health depends on fiber diversity: prebiotic fiber, soluble fiber, insoluble fiber, and fermentable fiber

Most fiber supplements only have one. 

Core Fiber combines multiple fiber types to mirror the diversity of a whole-food diet — something single-ingredient fibers can’t replicate.
Doctor Formulated
Clinically-Studied Ingredients
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Core Fiber — Complete Gut Support

A multi-fiber, prebiotic blend designed to support digestion, energy, and metabolism — not just regularity.

Flavor: Unflavored

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More Fiber, More Support:
Each serving delivers 6g of fiber—more than most powders or gummies—so you get real digestive support you can feel.

Soluble & Insoluble Fiber:
Core Fiber includes both types of fiber your body needs. Soluble fiber feeds your gut microbes and supports smoother digestion. Insoluble fiber helps keep everything moving—naturally and effectively.

Built for Real Life:
Whether you’re lifting, working, parenting, or all of the above, Core Fiber fits right in. It supports digestion, nutrient absorption, and all-day energy—so you can feel lighter, stronger, and more balanced.

Clean, Easy, Effective:
No artificial flavors. No fillers. Just a gut-friendly blend that mixes fast, tastes great, and actually works.

Core Fiber is made with a blend of five all-natural, plant-based fibers selected for their numerous prebiotic benefits and gut-friendly profile. 

Core Fiber contains:

NO sugar
NO artificial ingredients
NO gluten
NO soy
NO dairy
NO GMOs


It is also vegan and keto-friendly.

Science
Fiber is one of the most well-studied and widely recommended nutrients in human health, with thousands of clinical studies supporting its role in digestion, microbiome health, metabolic function, and even skin clarity and immune support. Core Fiber is formulated in collaboration with leading MDs and PhDs to deliver the most effective types and forms of fiber—no filler ingredients, no gimmicks. Just real results rooted in science. 

Third Party Testing
Our products undergo rigorous testing to ensure quality and purity. We work with highly accredited labs to verify that Core Fiber meets all label claims and passes contaminant screenings for pesticides, heavy metals, and microbial contaminants.

Certifications
Manufactured in SQF, GMP, and FDA certified facilities in the U.S., and thoroughly tested for heavy metals and contaminants.

Mix one scoop with 8-12 oz of water or your favorite beverage (or food!) daily. For best results, take it consistently—ideally around the same time each day. Increase to 2-3 scoops daily for maximum effect.

New to fiber? Start with half a scoop for the first 4 days to let your body adjust, and make sure you’re drinking plenty of water.

Core Fiber comes in two flavors:

Unflavored - a neutral, tasteless powder designed to be mixed in anything without the grit or weird aftertaste. Most customers add this to beverages like water and coffee, or to snacks like yogurt and oatmeal. 

Strawberry Kiwi -  a delicious combo of sweet strawberry and tangy kiwi flavors. The perfect flavor boost for water, protein shakes, or yogurt—no grit, no weird aftertaste. 

CORE FIBER

CORE FIBER

$35.99

StarFour NO Artificial Ingredients
StarFour 3rd Party Tested
StarFour Made in USA
StarFour Non GMO
StarFour NO Sugar
StarFour NO Gluten
4.8/5 Avg. Rating 
REAL WOMEN. LASTING RESULTS.
Thousands of women have taken control of their gut and metabolic health with Core Fiber.
More Regular
Ive been looking for an easy way to get more fiber in my diet. Core Fiber mixes smoothly with my morning smoothie (and even in just water, its not bad), and I notice I feel less sluggish during the day. My digestion seems more regular, and I'm not as bloated after meals. It's made a noticeable difference for me
E & Y
Verified Purchase
Perfect & Easy Fiber Supplement
Works perfectly! Dissolves really easy in a glass of water. Also works great with your daily protein shake or smoothie, has no taste and blends perfectly. Highly recommend.
Linda D.
Verified Purchase
Perfect Daily Fiber
This is such a great way to add fiber on a daily basis. So easy to add to oats, yogurt or smoothies and the taste is good/neutral. The powder is very dissolvable, so you don’t end up with the chunky texture of other supplements.
Emily B.
Verified Purchase
Fantastic Daily Fiber Boost
Been mixing this into my breakfast meals for the last month and am already seeing better digestion and more consistent energy throughout the day. Simple way to add more fiber without changing my routine!
Brenda
Verified Purchase
Great Addition to My Morning Smoothie!
I have been using for 2 months. Started more for the combination of prebiotic and fiber as an add on to my morning regimen. I feel less bloated and less upset stomach episodes. Feeling more energy is probably a combination of multiple changes- more water, no caffeine and healthy nutrition!
Jen B.
Verified Purchase