Fiber Target (30-50g/day)
Aim for 30-50g fiber daily from diverse plant sources. Feeds gut microbiome, improves metabolic health, and is strongly linked to lower mortality risk.
Dosage & Timing
Evidence Strength
5/5 — Very StrongVery strong epidemiological and interventional evidence. Higher fiber intake consistently linked to reduced CVD, diabetes, and cancer risk.
Overview
Consume 30-50g of dietary fiber per day from diverse whole food sources. Fiber feeds beneficial gut bacteria, improves glycemic control, supports cardiovascular health, and is consistently associated with lower all-cause mortality.
How To Do It
Audit current intake
Track fiber for 3 days. Most people eat 15g/day — half the minimum.
Add fiber-rich foods
Beans, lentils, vegetables, berries, oats, chia seeds, flaxseed.
Increase gradually
Add 5g/day per week to avoid GI distress. Drink adequate water.
Aim for diversity
30+ different plant foods per week for microbiome diversity (Tim Spector's recommendation).
The Evidence
Each claim is linked to its source study. Confidence reflects the study design — systematic reviews and RCTs rank highest.
Carbohydrate quality and human health↗
Higher dietary fiber intake was associated with lower cardiometabolic and mortality risk.
Primary Literature
Who Popularized This
Interactions & Warnings
Contraindications
- ⚠IBS/IBD (increase gradually, consult physician)
- ⚠SIBO (may need to limit certain fibers)
Interactions
- •Supports gut microbiome diversity for fermented foods protocol
Measurable Outcomes
Related Protocols
Fermented Foods for Gut Health
2-3 servings of fermented foods daily to boost gut microbiome diversity. Stanford research showed this increased microbial diversity and reduced inflammatory markers.
Fiber Ramp
Increase fiber gradually using beans, oats, berries, vegetables, chia, or psyllium to avoid GI backlash.
Weekly Meal Prep Minimum
Prep one protein, one fiber-rich carbohydrate, and one vegetable base to reduce reliance on takeout.
Protein Target (1.6-2.2g/kg)
Hit 1.6-2.2g protein per kg bodyweight daily across 3-5 meals. The single most important nutritional target for muscle preservation, satiety, and healthy aging.