Ep 143: Fiber myths: how much do you actually need?

Ep 143: Fiber myths: how much do you actually need?

Author: Ashleigh VanHouten & Rachel Gregory | Fitness, Strength Training, Wellness September 22, 2026 Duration: 47:32

How much fiber do you actually need, and can you overdo it? Rachel and Ashleigh sort the fiber claims that hold up from the ones that don't: where the 30 gram number came from, what happens when you jump from 10 grams to 40, whether fiber does anything for your hormones, and what to do about constipation on a GLP-1.

They also talk about fiber supplements, resistant starch from cooked and cooled rice and potatoes, whether you should eat fiber before training, and more.

Head to truenutrition.com/MUSCLE and use the code MUSCLE for 20% off your custom mix! Choose a mix of protein bases, a range of delicious flavors and sweetness level, and boost your protein with adaptogens, collagen, immune support, electrolytes and much more. Ashleigh loves the chocolate fudge brownie with a grassfed New Zealand beef protein base, and Rachel is testing different protein base combos for the ultimate protein ice cream recipe. Save time, effort, and money by combining all your supplement needs into one delicious protein powder. 

02:06 Protein versus fiber, and internet rage bait

03:04 Catch-up: Ashleigh's full blood panel

12:41 Where the 30 gram number came from

16:04 Digestion and regularity as feedback

18:01 Claim: fiber fills you up so you eat less

20:28 Fiber and the number on the scale

22:34 Net carbs

24:46 Claim: fiber supplements are a shortcut

29:53 Claim: fiber balances your hormones

32:02 Constipation on a GLP-1

34:39 Fiber intake moves with calories

36:15 Cooking and cooling rice and potatoes for resistant starch

39:01 Fiber before training

41:03 Whole versus ground flaxseed

41:41 Fiber before bed, and where to send questions

Watch on YouTube: https://youtu.be/I6eWkvmLDuQ 

Programs

Newsletter: https://substack.com/@musclescienceforwomen 

Ashleigh VanHouten: https://ashleighvanhouten.com , Instagram @themusclemaven
Rachel Gregory: https://rgfit.com , Instagram @rachelgregory.cns


Ashleigh VanHouten and Rachel Gregory, the co-creators behind the Muscle Science for Women training program, bring their combined expertise as a health coach and a nutritionist-strength specialist into a regular, down-to-earth conversation. This isn't about generic fitness advice; it's a deep, practical look at how women can build strength and wellness on their own terms. Each episode feels like pulling up a chair with two knowledgeable friends who genuinely understand the specific physiological and cultural landscape women navigate in gyms and kitchens. They tackle the real questions-from optimizing nutrition for energy and recovery to designing effective training sessions and critically examining fitness trends. The dialogue is always rooted in science but delivered without jargon, making complex topics like metabolism, hormonal influences, and sustainable habit change both accessible and actionable. Tuning into this podcast offers a reliable source of clarity amidst the noise, transforming the principles of muscle science into a personalized roadmap for anyone looking to feel stronger and more confident. You'll hear honest discussions that blend evidence with experience, all aimed at empowering your individual health journey.
Author: Language: English Episodes: 50

Muscle Science for Women
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