Nutrition
Dietary fiber: how much, which types, and where to get it
Fiber is the least exciting macronutrient and the one with the biggest impact on satiety, glucose, and gut health. How much and what kind to prescribe.
Most clients consume less than half the recommended fiber. Going from 12 to 25 g/day produces visible changes in satiety, bowel regularity, and post-meal glucose — without touching calories or macros.
How much to prescribe
- Adults: 25-30 g/day (women) and 30-38 g/day (men).
- Older adults: 21-28 g/day, adjusting hydration.
- Children: age + 5-10 g as a quick guideline.
Relevant types
Soluble fiber (oats, legumes, apple, psyllium) traps water, slows gastric emptying, and lowers LDL. Insoluble fiber (whole grains, leafy greens, nuts) speeds transit and regulates bowel habits. A varied diet covers both without counting grams by type.
How to ramp up without discomfort
- Increase in 5 g blocks every 5-7 days to avoid bloating and gas.
- Raise water with fiber: ~250 ml per extra 5 g.
- Prioritize whole-food matrix before pure supplements.
Frequently asked questions
Does psyllium help?
Yes. It is one of the soluble fibers with the most evidence for cholesterol, regularity, and satiety. Useful when diet does not hit the target.
About the author
Equipo Almendra
Editorial · Almendra
The Almendra editorial team brings together nutritionists, engineers, and product managers writing about how to run a modern nutrition practice.
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