80/100

Dairy

Kefir (Plain)

Excellent — Kefir (Plain) strongly supports fat-burning.

The lactose is largely fermented and the high protein slows digestion, so plain kefir has a low glycemic impact.

The breakdown

Per serving: 1 cup (240ml)

Glycemic load
4
Sugar (g)
12
Fiber (g)
0
Protein (g)
9

Glycemic index 34 · Carbs 12g · Fat 2g · Processing minimal

What this means for fat-burning

A FatTonic Score of 80 places kefir (plain) in the Excellent band. The score is dominated by its glycemic load of 4 (low — a gentle, sustained glucose curve).

Its protein content supports satiety and helps preserve muscle while you lose fat.

See how your whole day scores — free Metabolic Score →

Frequently asked questions

Does kefir (plain) spike insulin?

Kefir (Plain) has a glycemic load of 4 and a FatTonic Score of 80 out of 100, which means it strongly supports fat-burning. The lactose is largely fermented and the high protein slows digestion, so plain kefir has a low glycemic impact.

Is kefir (plain) good for fat loss?

With a FatTonic Score of 80/100 (Excellent), kefir (plain) strongly supports fat-burning. The lactose is largely fermented and the high protein slows digestion, so plain kefir has a low glycemic impact.

More dairy

100
Cottage CheeseExcellent · GL 1
99
Cheese (Cheddar)Excellent · GL 0
97
Greek Yogurt (Plain)Excellent · GL 1
77
Milk (Whole)Good · GL 5