On average, men need between 70g and 80g of protein per day. Let’s say your mixture has 30g per serving, and a serving, when mixed with liquid, is sixteen ounces. Getting a thirty-two ounce mixer is going to give you 60g of your daily protein needs, and we both know that’s not the only protein-rich food you’re going to be eating today. We recommend going for as close to 32oz (28oz is also good) as possible, so long as it’s helpful to your current mixture.\r