Skip to content
DE
Sugar

Fructose

Fructose is a simple sugar found mainly in fruit and honey. Table sugar is half fructose and half glucose.

Energy

What it is studied for

The strongest rated effects first. Bars show the size of the effect, the letter grades the evidence, and each rating lists the studies behind it.

Energy CrashesEnergySmallCNo linked study
Every rating with its studiesGrouped by health goal, with the publications behind each rating

What is fructose?

Fructose is a simple sugar found primarily in fruit. Its absorption in the intestine and its subsequent processing in the body are different steps, which helps explain why fructose malabsorption and hereditary fructose intolerance are different conditions. 1

Why people take it

Essential Health22.3%
Energy19%
Fitness15.8%
Immune Support14.2%
Bone & Joint6.5%
Cognition5.2%

SuppCo community snapshot, 2026-09-28. Reasons for use are not evidence that it works.

Questions people ask

Is fruit juice counted as free sugar?

Yes. EFSA includes sugars in fruit juice in this category. 2

Is fructose a weight-loss ingredient?

The feeding-trial review does not support a weight-loss advantage from calorie-matched substitution. 3

Does a lower glucose response make it healthier?

The substitution studies establish a short-term response, not a general health advantage. 4

Sources