Inavea™ Pure Acacia - Clinical Research Data Summary

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Inavea™ Pure Acacia Fiber Soluble Prebiotic Fiber

Inavea™ Pure Acacia Fiber is found in the following Silver Fern™ Brand product:

Introduction

Inavea™ Pure Acacia Fiber is a gentle, highly soluble prebiotic fiber derived from the natural gum of the acacia tree. Because it resists digestion in the upper gastrointestinal tract, it reaches the colon where it can be fermented by beneficial gut microbes.

Its gradual fermentation pattern helps support microbial activity throughout different regions of the colon and promotes the production of microbial metabolites known as short-chain fatty acids (SCFAs) such as acetate and butyrate. These compounds are commonly studied for their role in maintaining normal digestive physiology and intestinal barrier integrity.

Due to its slow and controlled fermentation profile, acacia fiber is generally well tolerated and may help support digestive comfort and regularity while producing less gas than some rapidly fermenting fibers.*

These are the studies for Inavea™ Pure Acacia Fiber. Below, we provided a summary of each key data for each study, along with a link to the complete clinical research.

  1. Summary of Study 1 – Full Study: https://pubmed.ncbi.nlm.nih.gov/38653808/
  2. Summary of Study 2 – Full Study: https://www.scirp.org/journal/paperinformation?paperid=116801
  3. Summary of Study 3 – Full Study: https://pmc.ncbi.nlm.nih.gov/articles/PMC7918852/
  4. Summary of Study 4 – Full Study: https://pubmed.ncbi.nlm.nih.gov/32328307/
  5. Summary of Study 5 – Full Study: https://pubmed.ncbi.nlm.nih.gov/26042049/
  6. Summary of Study 6 – Full Study: https://www.ajol.info/index.php/sjms/article/view/101942
  7. Summary of Study 7 – Full Study: https://www.tandfonline.com/doi/abs/10.1080/08910600310014377
  8. Summary of Study 8 – Full Study: https://www.sciencedirect.com/science/article/abs/pii/S0271531785800427

Ingredient Manufacturer Website: https://www.nexira.com/brand/inavea/



Study 1 Summary

Complete Study Information: https://pubmed.ncbi.nlm.nih.gov/38653808/

Randomized Controlled Trial Evaluating Acacia Fiber Supplementation
European Journal of Nutrition. 2024.

This randomized, double-blind, placebo-controlled clinical trial evaluated the effects of acacia fiber supplementation on bowel habits and digestive tolerance in 180 adults over 4 weeks. Participants consumed 10 g/day of acacia fiber (titrated from 5 g/day) compared with placebo (maltodextrin) and a probiotic arm.

Study Design Highlights

  • Study design: Randomized, double-blind, placebo-controlled clinical trial
  • Participants: 180 adults
  • Dose: 10 g/day acacia fiber (titrated from 5 g/day)
  • Duration: 4 weeks
  • Comparator: Placebo (maltodextrin) and probiotic arm
  • Primary endpoint: Stool frequency

Key Findings (What the Study Showed)

1. Increased Stool Frequency

  • Acacia fiber: +1.3 bowel movements per week
  • Placebo: +0.4 bowel movements per week

2. Consistent Daily Bowel Movement Patterns

  • Acacia fiber: +0.14 bowel movements per day
  • Placebo: no meaningful daily change

3. Stool Characteristics

Stool consistency softened slightly across all study groups, including placebo. Importantly, acacia fiber supplementation was not associated with increased loose stools or diarrhea in this study.

4. Digestive Tolerance

  • No meaningful increase in bloating
  • No increase in abdominal discomfort
  • No increase in flatulence compared with placebo
  • Study compliance: 98% adherence among participants

Benefits of Inavea™ Pure Acacia Demonstrated by This Study

Based directly on the clinical outcomes, acacia fiber was shown to:
✓ Support increased bowel movement frequency (+1.3 vs. +0.4 per week vs. placebo)
✓ Support consistent daily digestive regularity
✓ Maintain stool consistency without increasing loose stools
✓ Demonstrate excellent digestive tolerance with 98% study compliance
✓ Produce no increases in bloating, discomfort, or flatulence compared with placebo

Why This Study Matters

In this randomized clinical study, acacia fiber supplementation was associated with increased bowel movement frequency and excellent digestive tolerance compared with placebo. Because acacia fiber ferments gradually in the colon, it may provide digestive support without the rapid gas production sometimes associated with quickly fermenting fibers.*

Reference Link: https://pubmed.ncbi.nlm.nih.gov/38653808/



Study 2 Summary

Complete Study Information: https://www.scirp.org/journal/paperinformation?paperid=116801

The Effect of Gum Acacia on Post-Prandial Glucose and Insulin Levels in Healthy Subjects
Food and Nutrition Sciences. 2022.

This double-blind, randomized, controlled crossover study evaluated how gum acacia supplementation influences post-meal blood glucose and insulin responses in 35 healthy adults (normal weight and overweight). Participants were tested across three conditions: 20 g gum acacia, 40 g gum acacia, and a control condition.

Study Design Highlights

  • Study design: Randomized, double-blind, three-way crossover study
  • Participants: 35 healthy adults (normal weight and overweight)
  • Interventions: 20 g gum acacia, 40 g gum acacia, control (no fiber)
  • Outcome measures: Post-prandial glucose, post-prandial insulin, digestive tolerance

Key Findings (What the Study Showed)

1. Post-Meal Blood Glucose Responses (iAUC 0–120 min)

  • 20 g dose: approximately 35% lower glucose response vs. control
  • 40 g dose: approximately 34% lower glucose response vs. control

2. Peak Glucose Levels

  • Maximum glucose levels were approximately 12% lower at both fiber doses compared with control

3. Post-Meal Insulin Responses

  • 20 g dose: approximately 26% lower peak insulin levels vs. control
  • 40 g dose: approximately 32% lower peak insulin levels vs. control
  • Total insulin exposure during the two-hour post-meal period was also reduced

4. Individual Response Patterns

  • 74% of participants showed lower glucose responses with the 40 g dose
  • 60% of participants showed lower glucose responses with the 20 g dose

5. Digestive Tolerance

  • No meaningful increase in gastrointestinal discomfort
  • High tolerability ratings for both doses
  • No changes in body weight or appetite during the study

Benefits of Inavea™ Pure Acacia Demonstrated by This Study

Based directly on the clinical outcomes, acacia gum was shown to:
✓ Support approximately 34–35% lower post-meal glucose exposure vs. control
✓ Support approximately 12% lower peak glucose concentrations
✓ Support approximately 26–32% lower peak insulin levels
✓ Show beneficial response patterns in a majority of participants
✓ Maintain high digestive tolerance at both 20 g and 40 g doses

Why This Study Matters

Dietary fibers are widely studied for their ability to influence post-meal metabolic responses and digestive physiology. This study suggests that acacia gum may influence post-meal glucose and insulin responses when consumed with food, while maintaining excellent digestive tolerance.*

Reference Link: https://www.scirp.org/journal/paperinformation?paperid=116801



Study 3 Summary

Complete Study Information: https://pmc.ncbi.nlm.nih.gov/articles/PMC7918852/

Acacia Gum Is Well Tolerated While Increasing Satiety and Influencing Post-Meal Glucose Responses in Healthy Adults
Nutrients. 2021.

This randomized, double-blind, placebo-controlled crossover study evaluated the effects of acacia gum supplementation on satiety, digestive tolerance, and post-meal glucose responses in 48 healthy adults (24 men, 24 women) across three conditions: 0 g (control), 20 g, and 40 g acacia gum.

Study Design Highlights

  • Study design: Randomized, double-blind, placebo-controlled crossover trial
  • Participants: 48 healthy adults (24 men, 24 women)
  • Interventions: 0 g control, 20 g acacia gum, 40 g acacia gum
  • Duration: Single-meal testing with 4-hour post-meal monitoring
  • Primary outcomes: Satiety and gastrointestinal tolerance
  • Secondary outcomes: Blood glucose response and subsequent food intake

Key Findings (What the Study Showed)

1. Increased Satiety (40 g dose)

Participants reported reduced hunger at 15, 30, and 240 minutes post-meal, increased feelings of fullness at 15 and 240 minutes post-meal, and greater meal satisfaction shortly after eating.

2. Post-Meal Glucose Responses

The 20 g acacia gum dose was associated with a lower peak glucose level at 30 minutes after the meal compared with the control condition. The 40 g dose showed a similar directional trend.

3. Subsequent Food Intake

No significant differences were observed in calories consumed at the test lunch (4 hours later), same-day total calorie intake, or 24-hour energy intake. However, average daily intake showed a gradual downward trend with increasing fiber dose.

4. Digestive Tolerance

Acacia gum demonstrated excellent digestive tolerance even at the highest dose. Participants reported only mild increases in bloating, flatulence, and gastrointestinal rumbling. Importantly, there were no increases in diarrhea, cramping, nausea, or constipation, and palatability remained acceptable across doses.

Benefits of Inavea™ Pure Acacia Demonstrated by This Study

Based directly on the clinical outcomes, acacia gum was shown to:
✓ Support reduced hunger at multiple time points up to 4 hours post-meal (40 g dose)
✓ Support increased feelings of fullness post-meal
✓ Support lower peak post-meal glucose at 30 minutes (20 g dose)
✓ Demonstrate excellent tolerance with no increases in diarrhea, cramping, or nausea
✓ Maintain acceptable palatability at both 20 g and 40 g doses

Why This Study Matters

In this randomized controlled crossover study, acacia gum supplementation increased subjective measures of satiety and demonstrated excellent digestive tolerance, while also showing differences in early post-meal glucose responses compared with the control condition.*

Reference Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC7918852/



Study 4 Summary

Complete Study Information: https://pubmed.ncbi.nlm.nih.gov/32328307/

Gum Arabic (Acacia senegal) Supplementation and Biomarker Changes in a Clinical Population
International Journal of Nephrology. 2020.

This Phase II clinical study evaluated the effects of 30 g/day gum arabic supplementation for 12 weeks on several blood biomarkers in 40 adults receiving regular hemodialysis.

Study Design Highlights

  • Study design: Single-arm, open-label Phase II clinical trial
  • Participants: 40 adults undergoing routine hemodialysis
  • Dose: 30 g/day gum arabic
  • Duration: 12 weeks
  • Measured outcomes: Total antioxidant capacity (TAC), malondialdehyde (MDA), C-reactive protein (CRP), blood cell markers

Key Findings (What the Study Showed)

1. Changes in Antioxidant Capacity

  • Total antioxidant capacity (TAC): Baseline ~0.59 mmol/L → Week 12 ~1.11 mmol/L
  • Approximate 88% increase in measured antioxidant capacity

2. Changes in Oxidative Stress Markers

  • Malondialdehyde (MDA): Baseline ~5.56 nmol/L → Week 12 ~2.89 nmol/L
  • Approximate 48% decrease in measured MDA levels

3. Changes in C-Reactive Protein

CRP values declined from baseline through weeks 4, 8, and 12 of the intervention period.

4. Blood Marker Observations

  • Increases in hemoglobin levels and red blood cell counts
  • Other measured blood parameters did not show significant changes

5. Tolerance and Safety

Participants generally tolerated the supplementation well. Some individuals reported mild gastrointestinal symptoms (bloating, nausea, diarrhea) that resolved without intervention. No serious adverse events were attributed to the supplementation.

Benefits of Inavea™ Pure Acacia Supported by This Study

Based directly on the clinical findings, gum arabic supplementation was associated with:
✓ Approximately 88% increase in total antioxidant capacity over 12 weeks
✓ Approximately 48% decrease in malondialdehyde (oxidative stress marker)
✓ Progressive decreases in CRP across the 12-week period
✓ Increases in hemoglobin and red blood cell counts
✓ Acceptable tolerance in a complex clinical population

Why This Study Matters

This clinical study demonstrates that gum arabic supplementation may influence several biomarkers related to oxidative balance and physiological processes. Because the participants had complex underlying health conditions, the results primarily provide insight into potential biological effects of gum arabic supplementation in clinical research settings.*

Reference Link: https://pubmed.ncbi.nlm.nih.gov/32328307/



Study 5 Summary

Complete Study Information: https://pubmed.ncbi.nlm.nih.gov/26042049/

Clinical Study Evaluating Gum Arabic Supplementation and Blood Lipid Markers
Frontiers in Physiology. 2015.

This case-control clinical study evaluated the effects of gum arabic supplementation on blood lipid markers in 110 adults receiving standard medical care for elevated cholesterol. Participants were divided into two groups: atorvastatin (20 mg/day) alone vs. atorvastatin plus 30 g/day gum arabic, studied over 4 weeks.

Study Design Highlights

  • Study design: Case-control clinical study
  • Participants: 110 adults with elevated cholesterol
  • Duration: 4 weeks
  • Study group: Atorvastatin (20 mg/day) + 30 g/day gum arabic
  • Control group: Atorvastatin (20 mg/day) alone
  • Measured outcomes: Total cholesterol, LDL, triglycerides, HDL

Key Findings (What the Study Showed)

Participants receiving gum arabic in addition to standard therapy showed larger reductions in total cholesterol, LDL cholesterol, and triglycerides compared with those receiving standard therapy alone. These differences were reported as statistically significant. HDL cholesterol did not change significantly in either group.

Benefits of Inavea™ Pure Acacia Supported by This Study

Based on the study findings, gum arabic supplementation alongside standard therapy was associated with:
✓ Greater reductions in total cholesterol compared with standard therapy alone
✓ Greater reductions in LDL cholesterol compared with standard therapy alone
✓ Greater reductions in triglycerides compared with standard therapy alone
✓ High participant adherence throughout the study period

Why This Study Matters

Soluble dietary fibers are widely studied for their ability to influence digestive physiology and metabolic markers, including blood lipid levels. This study contributes to the broader body of research examining how fermentable dietary fibers such as gum arabic may influence lipid-related biomarkers.*

Reference Link: https://pubmed.ncbi.nlm.nih.gov/26042049/



Study 6 Summary

Complete Study Information: https://www.ajol.info/index.php/sjms/article/view/101942

Clinical Study Evaluating Gum Arabic Supplementation and Bowel Movement Patterns in Children
Sudan Journal of Medical Sciences. 2012.

This prospective comparative clinical study evaluated the effects of gum arabic supplementation alongside standard care on bowel movement patterns in 150 children under age 16 experiencing infrequent bowel movements. Participants received either standard care using lactulose alone or lactulose plus gum arabic (20–40 g/day) over 3 months.

Study Design Highlights

  • Study design: Comparative clinical study
  • Participants: 150 children under age 16 with infrequent bowel movements
  • Duration: 3 months
  • Group 1: Standard care (lactulose)
  • Group 2: Lactulose + gum arabic (20–40 g/day)

Key Findings (What the Study Showed)

Differences in Bowel Movement Patterns

At 1 month: 65% of gum arabic group met improvement criteria vs. 56.7% in standard care group. At 3 months: 93.6% of gum arabic group met improvement criteria vs. 80% in standard care group. Both differences were statistically significant.

Researchers noted improvements in symptoms including difficulty passing stool, straining, stool retention behaviors, and occasional abdominal discomfort, particularly in the group receiving gum arabic. Gum arabic supplementation was generally well tolerated with good participant compliance and no significant adverse effects.

Benefits of Inavea™ Pure Acacia Supported by This Study

Based directly on the clinical findings, gum arabic supplementation alongside standard care was associated with:
✓ Significantly greater proportions of participants meeting bowel movement improvement criteria at 1 and 3 months
✓ Improvements in stool passage, straining, and digestive comfort
✓ Good compliance and tolerability with no significant adverse effects

Why This Study Matters

This study contributes to the broader body of research examining how fermentable dietary fibers may support digestive regularity when included alongside standard care approaches, demonstrating progressive improvements over a 3-month period.*

Reference Link: https://www.ajol.info/index.php/sjms/article/view/101942



Study 7 Summary

Complete Study Information: https://www.tandfonline.com/doi/abs/10.1080/08910600310014377

Acacia Gum Is a Bifidogenic Dietary Fibre with High Digestive Tolerance in Healthy Humans
Microbial Ecology in Health and Disease. 2003.

This controlled human intervention study evaluated the effects of acacia gum supplementation (10–70 g/day) on gut microbiota composition, stool characteristics, and digestive tolerance in 20 healthy adults. Acacia gum (Fibregum®) was compared with sucrose (placebo) and FOS across 10-day intake periods and an 18-day dose-escalation phase.

Study Design Highlights

  • Study design: Controlled intervention study with dose-escalation components
  • Participants: 20 healthy adults
  • Intervention: Acacia gum 10–70 g/day
  • Comparators: Sucrose (placebo) and FOS
  • Primary outcomes: Fecal microbiota composition, stool output, gastrointestinal tolerance

Key Findings (What the Study Showed)

1. Changes in Beneficial Microbial Populations

Acacia gum at 10–15 g/day was associated with increases in Bifidobacteria, Lactobacilli, and lactic acid–producing bacteria. No significant increases in total aerobic or anaerobic bacterial counts were observed, suggesting selective microbial changes. Largest changes were observed in participants with lower baseline Bifidobacteria levels.

2. Stool Characteristics

Stool weight increased by approximately 30% at 15 g/day, primarily related to higher stool water content and microbial biomass. Approximately 95–97% of acacia gum was fermented in the colon during the study.

3. Digestive Tolerance

Well tolerated up to 30 g/day with symptom levels comparable to placebo. At higher doses (50–70 g/day), mild flatulence was reported, but no increases in diarrhea or abdominal cramping.

4. Fermentation Characteristics

Lower breath hydrogen production compared with FOS and more gradual fermentation patterns in the colon. Gradual fermentation is often associated with improved digestive tolerance compared with rapidly fermenting fibers.

Benefits of Inavea™ Pure Acacia Demonstrated by This Study

Based directly on the human study findings, acacia gum was shown to:
✓ Support increases in Bifidobacteria, Lactobacilli, and lactic acid–producing bacteria at 10–15 g/day
✓ Support approximately 30% increase in stool weight at 15 g/day
✓ Demonstrate excellent tolerance comparable to placebo up to 30 g/day
✓ Ferment gradually with lower breath hydrogen production than FOS
✓ Show 95–97% colonic fermentation with no significant diarrhea or cramping

Why This Study Matters

In this controlled human study, acacia gum supplementation increased several microbial groups commonly associated with prebiotic activity while demonstrating excellent digestive tolerance across a wide range of intake levels. The fiber fermented gradually in the colon and was associated with changes in stool characteristics without causing significant gastrointestinal discomfort.*

Reference Link: https://www.tandfonline.com/doi/abs/10.1080/08910600310014377



Study 8 Summary

Complete Study Information: https://www.sciencedirect.com/science/article/abs/pii/S0271531785800427

Clinical Study Evaluating Gum Acacia Supplementation and Blood Lipid Markers in Adults
Nutrition Research. 1985.

This early clinical study evaluated the effects of 30 g/day gum acacia supplementation on blood lipid markers in 7 adults over a 30-day supplementation period following a 15-day control period.

Study Design Highlights

  • Study design: Single-arm intervention study
  • Participants: 7 adults
  • Dose: 30 g/day gum acacia (15 g twice daily with meals)
  • Duration: 15-day control period + 30-day supplementation period
  • Study limitations: Small sample size (n=7), single-arm design

Key Findings (What the Study Showed)

  • Total serum cholesterol: decreased by approximately 10.4% (p < 0.05)
  • LDL + VLDL cholesterol: decreased by approximately 14.6% (p < 0.05)
  • HDL cholesterol: no significant change
  • Triglycerides: no significant change
  • Approximately 71% of participants showed notable reductions in total cholesterol
  • Digestive tolerance: generally well tolerated with only mild flatulence reported

Benefits of Inavea™ Pure Acacia Supported by This Study

Based on the early clinical findings, gum acacia supplementation was associated with:
✓ Approximately 10.4% reduction in total serum cholesterol over 30 days
✓ Approximately 14.6% reduction in LDL + VLDL cholesterol
✓ Notable reductions in approximately 71% of participants
✓ Good digestive tolerance with only mild flatulence reported

Why This Study Matters

This study contributes to early research examining how gum acacia supplementation may influence lipid-related biomarkers when included as part of the diet. Soluble dietary fibers are widely studied for their potential influence on digestive physiology and metabolic markers, including blood lipid levels. As a small, single-arm study it should be interpreted as preliminary evidence.*

Reference Link: https://www.sciencedirect.com/science/article/abs/pii/S0271531785800427

Big-Picture Integration with Other Studies

  • Study 1: Acacia fiber supplementation was associated with increased bowel movement frequency (+1.3 per week vs. +0.4 placebo) and good digestive tolerance without increases in abdominal discomfort compared with placebo.
  • Study 2: Acacia gum supplementation was associated with approximately 34–35% lower post-meal glucose and 26–32% lower peak insulin responses when consumed with food, while maintaining high digestive tolerance across tested doses.
  • Study 3: Acacia gum supplementation increased subjective measures of fullness after meals and demonstrated excellent gastrointestinal tolerance, with lower peak glucose at 30 minutes post-meal.
  • Study 4: Clinical research observed approximately 88% increase in total antioxidant capacity and 48% decrease in oxidative stress markers during gum arabic supplementation, along with decreases in CRP.
  • Study 5: Clinical research reported differences in several blood lipid markers among participants consuming gum arabic alongside standard therapy, with greater reductions in total cholesterol, LDL, and triglycerides.
  • Study 6: In a pediatric clinical study, children receiving gum arabic alongside standard care showed significantly greater improvements in bowel movement patterns at 1 and 3 months compared with those receiving standard care alone.
  • Study 7: Human research found acacia gum supplementation increased Bifidobacteria, Lactobacilli, and lactic acid–producing bacteria while demonstrating excellent digestive tolerance comparable to placebo up to 30 g/day.
  • Study 8: Early clinical research reported approximately 10.4% reduction in total cholesterol and 14.6% reduction in LDL+VLDL cholesterol following daily gum acacia supplementation.

Inavea™ Pure Acacia Fiber Ingredient Summary & Real-World Relevance

Inavea™ Pure Acacia Fiber is a naturally derived soluble prebiotic fiber sourced from the gum of the Acacia senegal tree. It is composed primarily of complex polysaccharides that resist digestion in the upper gastrointestinal tract and are gradually fermented by gut microbes in the colon.

Because acacia fiber ferments gradually in the colon, it may help support normal bowel movement frequency and stool consistency while maintaining good digestive tolerance compared with rapidly fermenting fibers. Human and laboratory studies have observed increases in microbial groups commonly associated with prebiotic activity — including Bifidobacteria — and the production of beneficial SCFAs following acacia gum supplementation.

Some clinical studies have reported differences in post-meal glucose and insulin responses when acacia gum is consumed with meals. Acacia gum has demonstrated excellent digestive tolerance across a wide range of intake levels in human studies — well tolerated up to 30 g/day with symptom levels comparable to placebo — and its gradual fermentation pattern may help reduce digestive discomfort compared with rapidly fermenting fibers.*

Ingredient Manufacturer Website: https://www.nexira.com/brand/inavea/

Inavea™ Pure Acacia Fiber is a clinically studied ingredient used in the following Silver Fern™ Brand product:

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.