Is whey keto?
whey is not keto: it has ~108 g of net carbs per 1 cup, against the keto diet's 5 g-per-serving limit.
Net carbs = total − fiber
108 g
per 1 cup
These are the carbs that count on keto: total carbs minus fiber.
With over 108g of net carbs per standard cup serving, sweet whey powder is extremely high in lactose (milk sugar) and will kick you out of ketosis.
Nutrition facts for whey
How many carbs are in whey?
whey has ~108 g of carbs and ~108 g of net carbs per 1 cup (total carbs minus 0 g of fiber).
Why whey is not keto?
On keto the goal is to stay under ~5 g of net carbs per serving; whey has 108 g per 1 cup (108 g total − 0 g of fiber).
How much whey can I eat on keto?
To stay under 5 g of net carbs, the limit is ~7 g of whey.
Related
Yes
Yes
In moderation
Yes
In moderation
Yes
Keto recipes with whey
✓ Keto-friendly
✓ Keto-friendly
See all: Keto cheese
Reviewed by the Ketorai team · Last updated: September 18, 2026 · How we assign the verdict
For information only. This does not replace advice from a health professional.
Something off? Let us know.
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