Caviar has starch?

Hello. I'm on a very low starch diet temporarily and was surprised to see that 2 teaspoons of caviar, according to NCCDB, has 0.4 grams of starch. The brand I eat is Holland House, which does have stabiliser 415 listed (Xanthan gum) which is a polysaccharide made from a bacterial coat. But polysaccharides aren't always starches though.

Is the Xanthan gum considered to be the starch, or does the caviar itself contain starch?

Thanks.

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