Fiber: study protocols
71 study groups say how much Fiber participants took a day. These are the doses the studies gave. They are not a recommendation.
Dose per serving from products
39 products in our catalogue print how much Fiber a serving holds.
Most common: 1 g to 2.5 g and 5 g to 10 g, 23% of 39 products each.
| Dose per serving | Products |
|---|---|
| 100 mg or less | 2 |
| 100 mg to 250 mg | 4 |
| 250 mg to 500 mg | 0 |
| 500 mg to 1 g | 6 |
| 1 g to 2.5 g | 9 |
| 2.5 g to 5 g | 4 |
| 5 g to 10 g | 9 |
| 10 g to 25 g | 2 |
| 25 g to 50 g | 1 |
| over 50 g | 2 |
Dose per serving from research
70 study groups in 38 studies say how much Fiber participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 10 g to 25 g, 30% of 70 study groups.
| Daily dose | Study groups |
|---|---|
| 1 g or less | 2 |
| 1 g to 2.5 g | 7 |
| 2.5 g to 5 g | 19 |
| 5 g to 10 g | 14 |
| 10 g to 25 g | 21 |
| 25 g to 50 g | 6 |
| over 50 g | 1 |
Commonly used together
8 of 71 study groups took Fiber with something else. Shown: what 3 or more different studies gave.
What was given together, not what works together.
| Taken with | Study groups |
|---|---|
| Inulin | 3 |
71 study groups
| Study | |||
|---|---|---|---|
| The role of dietary fiber on preventing gestational diabetes mellitus in an at-risk group of high triglyceride-glucose index women: a randomized controlled trial 2023 · fiber group · Pregnant women with a TyG index ≥8.5 before 20 weeks of gestation | 24 g | 5 weeks | — |
| Metabolite Biomarkers Linking a High-Fiber Rye Intervention with Cardiometabolic Risk Factors: The RyeWeight Study 2025 · rye group · Men and women aged 30–70 years with overweight or obesity (BMI 27–35 kg/m²) | 30 g | 12 weeks | 108 |
| Metabolite Biomarkers Linking a High-Fiber Rye Intervention with Cardiometabolic Risk Factors: The RyeWeight Study 2025 · refined wheat group · Men and women aged 30–70 years with overweight or obesity (BMI 27–35 kg/m²) | 8 g | 12 weeks | 99 |
| Soluble or insoluble fibre in irritable bowel syndrome in primary care? Randomised placebo controlled trial 2009 · Bran · Adults aged 18-65 with irritable bowel syndrome | 10 g | 12 weeks | 97 |
| A natural fiber complex reduces body weight in the overweight and obese: a double-blind, randomized, placebo-controlled study 2013 · IQP G-002AS group (IQ) · Men and women aged 18–60 years with overweight or obesity (BMI 25–35) | 1.5 g | 12 weeks | 62 |
| Dietary fiber supplementation for fecal incontinence: a randomized clinical trial 2014 · CMC group · Community-living adults aged 18 or older with fecal incontinence of loose or liquid feces | 16.2 g | 38 days | 53 |
| Dietary fiber supplementation for fecal incontinence: a randomized clinical trial 2014 · GA group · Community-living adults aged 18 or older with fecal incontinence of loose or liquid feces | 16.6 g | 38 days | 50 |
| Resistant starch intake facilitates weight loss in humans by reshaping the gut microbiota 2024 · resistant starch (HAM-RS2) · Adults aged 18–55 years with excess body weight, defined by BMI ≥24 kg/m² or increased waist circumference; no chronic disorders reported | 40 g | 8 weeks | 37 |
| Soluble Dietary Fiber Reduces Feeding Intolerance in Severe Acute Pancreatitis: A Randomized Study 2021 · SDF group · Patients with severe acute pancreatitis receiving enteral nutrition | 20 g | 4 weeks | 24 |
| Clinical studies in persistent diarrhea: dietary management with green banana or pectin in Bangladeshi children 2001 · pectin group · boys aged 5–12 months hospitalized with persistent diarrhea | 4,000 mg/kg | 7 days | 19 |