10 grams of l-glutamine powder is a small amount that fits easily into a kitchen measure. It is about the size of a grape when poured into a loose pile.

In kitchen measures
1.04 tablespoons
3.12 tsp · 1.04 tbsp · 0.065 cups
about the size of a grape
Density estimated by AI from typical values. L-glutamine powder typically ranges 0.55–0.75 g/mL depending on how it's packed. A firmly packed scoop weighs more.