Buy nutricology/allergy research group : fos powder, 100 gm

Fos powder

These are short-chain polymers composed of simple carbohydrates 
(fructose and sucrose) which are not metabolized by the body 
like simple sugars are. They occur naturally in bananas, garlic, 
jerusalem artichokes and certain other foods, and technically 
are a soluble fiber. FOS are effective sweeteners, being half as 
sweet as sucrose, yet not absorbed and have minimal caloric 
value. FOS may be considered a "pre" biotic as they selectively 
support the proliferation of intestinal probiotics, especially 
the bifidobacteria. 

Each 1/2 teaspoon (approx. 1.25 g) 
contains: 
Calories
  5 
Total Carbohydrates
  1.25 g 
Sugars
  1.25 g 
Fructooligosaccharides
  1.2 g 

Suggested 
Use:
As a dietary supplement, 1/2 to 1 teaspoon two to four 
times daily between meals, or as directed by a 
physician.

CAUTION: Some individuals using FOS experience 
gastrointestinal bloating that does not subside after 1 of 2 
weeks of use. In those cases, FOS should be discontinued. Recent 
clinical experience by some practitioners suggests that there 
are some unfriendly microbial invaders that are suspected of 
feeding on FOS. Symptoms of that occurring would be as indicated 
above.