Is a protein shake keto?

Protein shake (whey powder) has 1 g net carbs for every 1/3 cup (32 g), so it fits a keto day.

Drinks with fewer carbs

Food	Serving	Net carbs (g)
Vodka	1.5 fl oz (42 g)	0
Whiskey	1.5 fl oz jigger (42 g)	0

A protein shake serving of 1/3 cup (32 g) carries 1 g net carbs, or 5% of a 20 g keto day.

With 1 g in each serving, a protein shake leaves plenty of room on a keto day for other food.

That serving also gives you 25 g protein, plus 0.5 g fat, for 113 kcal.

In a protein shake, the 1 g of fiber is taken off the 2 g in total carbs, and what remains is the net carbs.

If you want fewer carbs than a protein shake, coffee gives 0 g net carbs in a 1 cup, 8 fl oz (237 g) serving.