5 Types of Fiber with Almost ZERO Benefit (eat these instead)

Summary

Thomas DeLauer argues that fiber’s benefits extend beyond bowel regularity. He focuses on whether different types of fiber support the production of short-chain fatty acids—especially butyrate—which he describes as beneficial for gut microbes and metabolism.

He also notes that a fiber that produces little butyrate may still support regularity or offer other nutritional benefits.

Fibers he says are less useful specifically for butyrate production

• Cellulose, found in foods such as lettuce and celery, is described as poorly fermentable and not a strong source of butyrate. He cautions against counting lettuce as a particularly beneficial fiber source, but does not suggest that these vegetables are unhealthy.
• Psyllium may help with bowel regularity, absorb water, and work well in baking, but is described as less useful for feeding gut microbes or producing butyrate.
• Some resistant starches, particularly high-amylose starches, may produce short-chain fatty acids without producing as much butyrate as other types. He suggests being cautious with packaged foods listing high-amylose starch or similar ingredients.
• Fructooligosaccharides (FOS) and galactooligosaccharides (GOS), associated in the video with foods such as onions, leeks, kidney beans, and lima beans, may feed bacteria that do not produce butyrate. He says not to avoid these foods outright, but not to assume their FOS or GOS content makes them especially beneficial for butyrate production.

Foods he recommends emphasizing

• Artichokes, asparagus, and Brussels sprouts
• Chia and flax seeds
• Foods higher in inulin, which he describes as more supportive of butyrate production

Practical takeaways and caveats

• Consider the type of fiber, not just the total amount. Different fibers may serve different purposes.
• Distinguish between fiber that supports regularity and fiber that may better support microbial fermentation and butyrate production.
• The video notes that findings may depend on factors such as gut transit time, and that several studies discussed were conducted in laboratories or animals. The comparisons should not be treated as definitive evidence that particular foods are harmful or should be eliminated.

Presenters and sources

• Presenter: Thomas DeLauer
• Research sources named in the video: Journal of Medicinal Foods; Nutrition and Cancer; Scientific Reports; European Journal of Clinical Nutrition
• Sponsor mentioned: Seed Synbiotic (a paid partnership)