Which has more protein per calorie?

The Slate Milk shake. It packs 30g of protein into 130 calories, while the Quest shake has 30g in 170 calories.

Is the Slate shake lactose-free?

Yes. It is made with ultrafiltered milk and lactase enzyme and is labeled lactose-free. The Quest shake contains milk and does not state that it is lactose-free.

Which has more calcium?

The Quest Chocolate shake, at 700mg of calcium per bottle. Slate does not list a calcium figure but is fortified with vitamins A and D3.

Is the Slate shake worth the price?

At $11.99 at Target as of November 6, 2026, it delivers 30g of protein for 130 calories with no added sugar. Whether that is worth it depends on whether you want the lower calorie count and dessert flavor.

Do either need refrigeration?

The Slate shake is shelf-stable and does not require refrigeration, though it is best served cold. The Quest shakes are bottled ready-to-drink; check the box for storage instructions.

Which is better for low-carb diets?

The Slate shake, at 1g of sugar and 0g added sugar. The Quest shake has 4g total carbs and 1g of sugar per bottle.

Slate Milk Cookies & Cream Protein Shake vs Chocolate Protein Shakes

Buy the Slate Milk Cookies & Cream if you want the most protein per calorie and a dessert flavor with no added sugar. Buy the Quest Chocolate shakes if you want chocolate, more calcium, and a 4-pack format. The Slate shake's best new price is $11.99 at Target as of November 6, 2026; no price was given for the Quest shakes.

Ask our shopping agent

It checks today's price at every store, compares the alternatives and answers in about a minute.