What Are Fructo-Oligosaccharides (FOS)?
Fructo-oligosaccharides (FOS), also known as fructooligosaccharides and oligofructose, are short chains of
fructose molecules. They occur naturally in many plants, including blue agave succulents, asparagus,
bananas, garlic, leeks, onions, and tomatoes. Fructo-oligosaccharides are low-calorie sugar alternatives
with about 30 to 50 percent sweetness of sugar. They also alleviate the poor aftertaste of many other sugar
Fructo-oligosaccharides are prebiotics and a source of dietary fiber. Their chemical configuration allows
them to resist breaking down in the presence of enzymes in the saliva and digestive system. Instead, they
bypass digestion and ferment into gas, lactate, and short-chain fatty acids in the colon. As a result, they
have a lower calorie value and don’t affect blood sugar levels.
Potential Fructo-Oligosaccharides Benefits
Fructo-oligosaccharides have many potential benefits, including:
Fructo-Oligosaccharides Support Gut Health
Fructo-oligosaccharides are prebiotics that nourish healthy bacteria in the gut (probiotics). They also
produce acids that can reduce harmful bacteria associated with food poisoning, such as
Clostridia perfringens and E. coli. Fructo-oligosaccharides are also a good
source of soluble fiber that can help relieve constipation. They also stimulate calcium absorption while
suppressing the breakdown of bones for calcium.
May Support Weight Loss and Lower Cholesterol Levels
Using fructo-oligosaccharides as a sugar substitute may help individuals trying to lose weight. Using sugar
substitutes reduces calories and doesn’t cause a glucose spike. Additionally, several studies show that
fructo-oligosaccharides help lower total cholesterol and triglyceride levels by reducing fatty-acid
What is the Best Sugar Substitute?
PureBulk carries numerous zero-calorie and low-calorie sugar alternatives. They have varied sweetness
profiles, and choosing the best sugar substitute is often specific to the individual. In addition to
fructo-oligosaccharides, PureBulk carries the following sugar alternatives:
Potential Fructo-Oligosaccharides Side Effects
Most people can use fructo-oligosaccharides as a sugar substitute or prebiotic without issue, as it is a
dietary soluble fiber. However, as an oligosaccharide, it is a FODMAP food. Individuals eating a low-FODMAP
diet, such as those with IBS or SIBO, may want to avoid fructo-oligosaccharides. Individuals with fructose
intolerances or sensitivities should not consume fructo-oligosaccharides. People with these conditions may
experience gastrointestinal side effects after consuming fructo-oligosaccharides, including bloating,
cramps, and diarrhea. However, research shows that most individuals can consume as much as 20g of
fructo-oligosaccharides per day without experiencing side effects.
Tested by Accredited 3rd Party Labs
PureBulk's supplements are tested by accredited third party labs in the USA to ensure their identity, purity
potency. To receive a copy of these test results or any other PureBulk supplement please fill out the
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