---

Product Specifications

Item Specification Product Name Fructooligosaccharides Abbreviation FOS CAS Number 30806-66-7 Molecular Formula CₙH₂ₙO₆ₙ (n=2~9) Appearance White to Light Yellow Free-Flowing Powder Assay ≥95% Test Method HPLC Shelf Life 24 Months Storage Condition Store in a Cool, Dry Place

Why Is FOS So Popular?

The growing popularity of FOS is closely linked to rising global consumer awareness of gut microbiome health, a core biological system that supports 70% of the body's immune function, participates in nutrient absorption, metabolic regulation and multiple key physiological processes. FOS plays an essential role in:

• Selectively nourishing and proliferating beneficial gut flora
• Promoting regular intestinal transit and digestive comfort
• Supporting mineral absorption and bone health
• Modulating immune response through gut barrier function
• Regulating postprandial blood sugar response

Research has shown that modern high-processed diets and irregular eating habits have led to widespread gut flora imbalance across population groups. As a plant-derived, natural prebiotic ingredient that cannot be digested by the human body, FOS is widely recognized as a core foundational ingredient in gut wellness formulations, with easy accessibility, proven efficacy and excellent formulation compatibility. This connection between FOS and digestive health has made it a staple ingredient across the global prebiotic supplement and functional food industry.

Key Benefits of FOS

• Fuels Beneficial Gut Bifidobacteria Growth

FOS passes intact through the stomach and small intestine without being digested, acting as exclusive nourishment for probiotic strains including Bifidobacterium and Lactobacillus. It effectively doubles or triples the population of beneficial gut bacteria in a short period, improving the balance of the entire gut microbiome.

• Supports Gentle Digestive Regularity

By increasing water retention in the intestinal tract and boosting peristalsis without harsh laxative effects, FOS effectively relieves mild constipation, bloating and irregular bowel movements for users of most age groups, supporting long-term steady digestive comfort.

• Enhances Mineral Nutrient Absorption

FOS stimulates the production of short-chain fatty acids in the colon, lowering local intestinal pH to significantly increase the absorption rate of calcium, magnesium and other essential minerals by up to 30%, supporting long-term bone density and mineral utilization.

• Strengthens Immune Barrier Function

A well-balanced gut flora nourished by FOS reinforces the integrity of the intestinal mucosal barrier, preventing harmful pathogens and toxins from penetrating into the bloodstream, and helping the body build a more robust natural immune defense.

• Supports Healthy Metabolic Balance

Clinical studies show that appropriate FOS intake helps moderate postprandial blood glucose spikes and support healthy lipid metabolism, making it a well-suited ingredient for daily wellness and weight management supportive formulations.

Applications

FOS is widely used across multiple product categories, including:

• Prebiotic Gut Health Supplements
• Digestive Regularity Support Products
• Immune Wellness Daily Formulations
• Mineral Absorption & Bone Health Products
• Children's Digestive Nutritional Items
• Probiotic Blend Combinations
• Sugar-Free Functional Foods & Beverages

Common dosage forms include:
Capsules, Tablets, Powder Blends, Stick Packs, Functional Beverages, Gummies, Fortified Dairy Products, Cereal Bars and Dietary Fiber Fortification Additives.

FOS vs Other Gut Health Ingredients

While the digestive wellness category continues to expand, FOS remains one of the most recognizable, cost-effective and widely accepted prebiotic ingredients available today.

Ingredient Primary Function FOS (Fructooligosaccharides) Natural plant prebiotic, selectively feeds beneficial gut bacteria, supports digestive regularity GOS (Galactooligosaccharides) Milk-derived prebiotic optimized for infant formulations Inulin Long-chain fructan dietary fiber with prebiotic properties Probiotic Strains Direct viable beneficial bacteria supplementation XOS (Xylooligosaccharides) High-efficiency prebiotic that works at very low dosages Digestive Enzymes Supports breakdown of macronutrients in the upper digestive tract

Many brands combine FOS with complementary ingredients including probiotics, dietary fiber and zinc to create comprehensive gut health and immune support formulations.

Market Opportunity

The global gut health and prebiotic market continues to experience strong growth as consumers increasingly prioritize long-term digestive wellness and preventive nutritional strategies. Several trends are fueling demand for FOS:

• Growing public awareness of gut microbiome science
• Rising demand for natural, plant-derived clean-label ingredients
• Expansion of functional food and beverage categories
• Increased interest in daily digestive support products
• Rising demand for science-backed prebiotic ingredients that suit mass consumer affordability

As a result, FOS remains one of the most commercially attractive foundational ingredients for brands developing next-generation mass wellness products.

Frequently Asked Questions

1.What is FOS?

FOS, or Fructooligosaccharides, is a natural plant-derived non-digestible prebiotic compound that selectively nourishes beneficial bacteria in the gut, supporting balanced microbiome composition, digestive health and whole-body wellness.

2.Is FOS derived from natural sources?
Yes. FOS is naturally present in large amounts in common foods such as bananas, onions, garlic, chicory root and Jerusalem artichoke, and industrial food-grade FOS is typically produced through natural enzymatic conversion of sucrose.

3.What formulations can FOS be used in?
FOS is suitable for capsules, tablets, powder blends, stick packs, gummies, functional beverages and direct fortification in various ordinary food products.

4.What purity level is typically available?
Premium dietary supplement grade FOS is commonly produced at purity levels of 95% or higher.

5.Will FOS cause gastrointestinal discomfort?
Within recommended daily intake amounts, most users experience zero side effects, with only very few people with extremely sensitive digestive systems reporting mild temporary gas at the initial stage of consumption.

Looking for a Reliable FOS Supplier?

As demand for prebiotic and gut health products continues to grow, ingredient quality, consistency, and supply reliability have become increasingly important for supplement brands and manufacturers. Nutrient Trail supplies high-purity FOS designed for dietary supplement, functional food, and beverage applications. Comprehensive technical documentation, including specifications, COA, and quality-related information, is available to support product development and commercialization. Whether you are launching a new prebiotic gut support product, expanding a digestive wellness portfolio, or exploring emerging opportunities in the prebiotic category, our team is ready to help you find the right ingredient solution for your next innovation.