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A kind of glutamine · also called Glutamine powder, L-glutamine

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About
L-glutamine powder is an amino acid supplement that weighs about 5.4 ounces (154 g) per US cup.
With a bulk density of about 0.38 ounces per cubic inch (0.65 g/mL), this amino acid powder packs moderately loose. A common 1-pound (454 g) container takes up roughly 3 cups (700 mL) of space. It requires more volume per pound than denser crystals like table salt, but it is noticeably denser than fluffy powders like sifted cocoa.
From Wikipedia
Glutamine is an α-amino acid that is used in the biosynthesis of proteins. Its side chain is similar to that of glutamic acid, except the carboxylic acid group is replaced by an amide.
Read more on Wikipedia →Text from Wikipedia’s “Glutamine” article, CC BY-SA 4.0.
1 on the site
One cup weighs
5.42 oz (154 g)
Quick answer
One US cup of L-glutamine powder weighs about 5.4 ounces (154 g). That makes a cup of it slightly heavier than all-purpose flour but much lighter than table sugar.
Typical figures, the same ones every comparison on the site uses; real ones vary.
More like L-glutamine powder
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Next to anything: a person, a car, another glutamine.