Whipping cream can work, it just has a lower fat content. Lower fat content means more lactose (sugar) which will make ketosis more difficult. Half-and-half has an even lower fat content and REALLY a lot of sugar that will likely guarantee you won’t get into ketosis. I only ever use “whipping cream” when I’m traveling and need to use the Trader Joe’s Shelf Stable Whipping Cream.
Here are the calories and carbohydrate content for a 15ml, 1 tablespoon “serving”:
|fat %||calories||carbs||carbs/400 calories|
|Heavy whipping cream||38||51||0.41||3.22|
|Darigold “Classic 40“||40||60||0.40||2.67|
The ironic thing is all of these have less than 1g per “serving” so they will often label the package as “0g total carbs” even though the half-and-half has nearly 6x as many carbs per calorie. You have to muck around the USDA food database to get the accurate nutrition information.