Name: Finally. FOS Prebiotic Fibre
Brand: Finally.
SKU: FOSJ
Price: 4.99 GBP
Availability: InStock

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Information

Product Description

Finally. FOS Prebiotic Fibre is a smart, plant-based sweetener that delivers a gentle, natural sweetness while actively supporting digestive health and overall wellbeing.

Made from Fructo-oligosaccharides (FOS), a naturally occurring prebiotic fibre derived from plants, it helps nourish beneficial gut bacteria, promoting a balanced and healthy digestive system. With approximately one-third the sweetness of sugar, it’s ideal for anyone seeking a subtle, mild flavour that complements both sweet and savoury creations.

Use it in baking, smoothies, yoghurts, hot drinks, sauces, or even when blending with other sweeteners to boost fibre content and improve taste balance. Its clean flavour and prebiotic benefits make it a versatile and intelligent addition to any modern kitchen.

Why Choose Finally. FOS?

0 Glycaemic Index suitable for low-carb and keto lifestyles
Sugar-free & 100% Plant-Based
Supports gut health and digestion
High in Fibre: 92.5g per 100g
33% as sweet as sugar: mild, clean, and naturally smooth taste

Finally. FOS is more than just a sweetener; it’s sweetness with purpose. A natural, functional ingredient designed to nourish your body while keeping your recipes wholesome and delicious.

Sustainability at heart: All our packaging is 100% recyclable.

Key Ingredients

Fructo-oligosaccharides

Serving and how to use

Serving: 1 teaspoon (5g)
Fibre per serving: about 4.6g
Servings: about 34 per 170g jar, about 120 per 600g pouch

Stir a spoonful into coffee, tea, yoghurt or a smoothie for gentle sweetness and a fibre boost. It's about a third as sweet as sugar, so it also works well blended with Finally. Stevia or Monk Fruit in bakes and sauces.

New to fibre? Start with half a teaspoon a day and build up gradually.

Usage, Health Tips and Storage

Sweetness and Baking Role: Finally. FOS Prebiotic Fibre is roughly 30% to 50% as sweet as standard sugar. Rather than serving as a direct 1:1 sugar swap, it acts as a functional prebiotic fibre that adds body, binds moisture, and improves texture in protein bars, keto bakes, smoothies, and raw treats.

Gradual Introduction: To allow your digestive system and gut flora to adapt comfortably, start with a low dose of 2g to 3g (around half a level teaspoon) daily. Gradually increase to your desired intake over 1 to 2 weeks to minimise temporary bloating or gas.

Solubility and Browning: Dissolves effortlessly in warm or cold drinks, yoghurt, and sauces with no gritty residue. In low-carb baking, it helps retain moisture and can produce a mild, natural browning under heat.

Storage: FOS is highly hygroscopic and readily attracts ambient moisture. Always seal the pouch tightly or store in an airtight container in a cool, dry place to prevent hard clumping, and keep out of reach of domestic pets.

Nutrition Facts

Typical Values: per 100 g

Energy

837 kJ / 200 kcal

Fat

0.3 g

- of which saturates

0.3 g

Carbohydrates

97 g

- of which sugars (net carbs)

4.3 g

- of which polyols

0 g

Dietary Fibre

93 g

Protein

0 g

Salt

0 g

Frequently Asked Questions

What is FOS Prebiotic Fibre and how does it benefit gut health?

FOS (Fructooligosaccharides) is a soluble prebiotic fibre derived from natural plant sources. It acts as fuel for the beneficial bacteria in your microbiome, such as Bifidobacteria, helping to support healthy digestion, improve nutrient absorption, and maintain a balanced gut.

How sweet is Finally. FOS Prebiotic Fibre and how do I use it?

FOS provides a mild, natural sweetness, reaching roughly 30% to 50% of the sweetness of table sugar. Because it is a fine, soluble powder, you can easily stir a scoop into water, smoothies, yoghurt, or warm drinks, or mix it into keto baking to boost dietary fibre without adding digestible carbs.

Will FOS Prebiotic Fibre cause digestive discomfort or spike blood sugar?

FOS passes through the upper digestive tract without being broken down into simple sugars, so it has a minimal impact on blood glucose and insulin levels. If you are new to prebiotic fibre, start with a small daily serving (around 5g) and gradually increase it, giving your gut bacteria time to adapt and preventing temporary bloating or gas.

Gut Health and Keto: The Role of Prebiotic Fibres

In our latest article, we explore the essential connection between gut health and a low-carb lifestyle, highlighting how prebiotic fibres like FOS can bridge the "fibre gap" common in keto diets. We explain how our Finally. FOS and STEFOS products support a balanced microbiome and digestive wellness without adding unwanted carbs. Read the full story here.

Read the full story here.