Serving Size: 3 cloves (9g)
This food has too little carbohydrate for a glycemic index to be measured.
Garlic is not a nutrition-panel food. Three cloves are about 13 calories and carry trace amounts of almost everything. Judging it by the panel misses the point entirely: you eat garlic for the compounds it makes, not for the macros it delivers.
It is a prebiotic, not a probiotic, and the difference matters. Sauerkraut and kimchi bring live bacteria in with them. Garlic brings food for the bacteria already living in you, in the form of inulin and fructans. One adds residents, the other feeds them.
Crush or chop it, then let it sit about 10 minutes before it meets heat. Allicin is not sitting in the clove waiting; it forms when cutting brings an enzyme and its target together. That enzyme is destroyed by heat, so garlic that goes straight from the board into a hot pan makes far less of it.
Modest but real contributions of manganese and vitamin B6, roughly 7% DV each per three cloves, alongside a little vitamin C and selenium.
The honest caveat, and it is the same mechanism read backwards: garlic is one of the densest fructan sources in the kitchen. That is exactly why it feeds gut bacteria so well, and exactly why it is among the first foods cut on a low FODMAP plan for IBS. Good fuel and a common trigger are not a contradiction here, they are one property seen from two sides.
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GI measures how fast a food raises blood sugar.
Tells you how big that rise actually is once portion size is factored in.
Watermelon has a high GI (it digests quickly) but a low GL because a normal serving doesn’t
contain many carbs so the actual blood-sugar impact is small.
Understanding both GI and GL gives you a clearer picture of how foods affect your blood sugar both the speed of the rise and the true impact based on the portion you eat.
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