How many protein shakes a day is too many?

Most people need one at most, to fix the one meal that comes up short. Your day’s protein is 1.2 to 1.6 g per kg of body weight (90 to 120 g at 165 lb), and food can cover most of it. Consumer Reports advised against daily use of most powders, so build any shake beyond the first from milk, yogurt or cottage cheese. The Gyroscope app personalizes your numbers.

Two camps answer this question very differently. In the gym, two or three shakes a day can seem normal, a scoop after training, one with breakfast and one before bed. Outside it, plenty of people worry that even one shake will strain their kidneys or replace real food. Both camps are counting shakes, when the useful thing to count is grams.

A shake works like a spare tire. It gets you through the day a meal goes flat, and you wouldn’t want to drive on it everywhere.

How much protein do I need in a day?

The 2025 to 2030 US guidelines ask for 1.2 to 1.6 g per kg of body weight a day, with protein at every meal. Split three ways, the low end is about 0.4 g per kg a meal, the same meal line a 2018 review proposed for muscle.

If your lunch and dinner already reach the line, a breakfast shake finishes the day. If two meals come up short, that’s a sign to put more protein on the plate, since a second and third shake are just a way of not cooking.

Is it bad to drink two protein shakes a day?

Your muscles won’t mind. The rest of you depends on what’s in them.

• Lead. Consumer Reports tested 23 powders and shakes in 2025 and found more than two thirds had more lead in one serving than its cautious daily level of 0.5 micrograms. It advised against daily use for most, and for the worst few products, once a week or not at all. Two scoops a day doubles whatever your powder carries.
• Calories. A scoop shaken with a cup of 2% milk is about 235 calories. Two of those on top of three meals is close to 500 extra calories a day, and liquid calories are the easiest kind to add without noticing. In a 2000 study, 450 extra calories a day as soda led to weight gain in four weeks, because people ate no less of anything else.
• Food. A shake made only of powder and water has 25 g of protein and almost nothing else. A meal has fiber, fruit and vegetables that the shake leaves out, and milk and Greek yogurt reach the same 25 g as food. How to make a protein shake without powder has three ways.

Who might need more than one?

People with a high line, like a 220 lb lifter who needs 40 g a meal, or anyone on a GLP-1 drug whose appetite has dropped so far that a glass is easier than a plate. What protein shake should I drink on Ozempic? covers that case. If you have kidney disease, your doctor sets your protein number, and none of the numbers on this page apply.

The protein shake calculator sizes one shake to your weight, and protein.guide adds up the rest of your day.