Lactisole

Lactisole is a carboxylic acid salt. This acid salt could get much better solution in water system. It is a natural identical acid which was isolated from the roasted Colombian arabica coffee beans. Like gymnemic acid, it can lower the level of the sweetness. It is a sweet inhibitor or taste modifier.

So there is a new answer for How to reduce the level of sweetness only. Lactisole could lower the sweetness of natural & artificial sweetening agent such as sucrose, fructose, glucose, mannitol, sorbitol, acesulfame-K, alitame, aspartame, Na cyclamate, Na saccharin etc.

The active ingredient is sodium 2-(4-methoxyphenoxy) propanoate (Na-PMP CAS No.150436-68-3) which has been widely recognized and approved by countries and organizations all over the world as food additive.
Na-PMP has been included in the list of Everything Added to Food in the United States (EAFUS) by the FDA with No. 2992.
Na-PMP has been recognized by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) with JECFA No. 1029. Safety assessment on Na-PMP by JECFA is No safety concern at current levels of intake when used as a flavoring agent.
Na-PMP is identified as GRAS (Generally Recognized as Safe) by FEMA (Flavor and Extract Manufacturers Association). FEMA No.3773.
The safety of Na-PMP has been recognized by the European Union and it is allowed to be used as a flavouring substance in foods, FL No. 16.041.