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GFO is a powdered drink mix that contains glutamine, fiber, and oligosaccharides. The product name is an acronym for the 3 ingredients. The product provides 3 nutrients for the intestines and has a fresh lemon flavor.


Glutamine is a kind of amino acids and the most abundant amino acid found in the body.

Fiber (Dietary fiber)

Dietary fiber is mainly divided into soluble fiber and insoluble fiber. Insoluble fiber holds water in the gut. Soluble fiber is decomposed to short-chain fatty acids by the gut microbes, which are used in the body. This product contains soluble fibers (polydextrose and partially hydrolyzed guar gum).


Oligosaccharide is food for bifidobacteria considered to be good bacteria.

Nutrition facts
(15 g/packet)
Calories 36 kcal, protein 3.6 g, fat 0 g, carbohydrate 6.0 g, dietary fiber 5.0 g, sodium 0.5 mg
Lactosucrose 1.45 g, glutamine 3.0 g
Product category Powdered drink mix
Ingredients Polydextrose, lactosucrose, dextrin, sugar, glutamine, hydrolyzed guar gum, acidulant, natural flavors, and sweetener (sucralose)
Volume 15 g per packet
Best before date 18 months after manufacturing date
Storage Store at room temperature out of direct sunlight and high temperature.
Distributor Otsuka Pharmaceutical Factory, Inc.
Manufacturing site Otsuka Foods Co., Ltd.
6-6, Takamatsu-cho, Konan-shi, Shiga

Click here to buy the product
(available only on the Japanese site).