Core Power can be a useful tool for weight gain, but it’s not a mass gainer. The Elite version packs 230 calories and 42g of protein into a single 14-ounce bottle, making it a convenient way to add calories and protein on top of your regular meals. Whether it’s “good” for weight gain depends on how you use it and what kind of weight you’re trying to add.
What’s Actually in Core Power
Core Power is made from ultra-filtered milk, which concentrates the protein while stripping out most of the sugar and all of the lactose. The Elite version delivers 42g of protein with only 8g of carbohydrates and 230 calories per bottle. The standard version contains 26g of protein at a lower calorie count. Both are lactose-free, so they’re easier on digestion than regular milk-based shakes.
For context, 230 calories is roughly equivalent to a large banana with two tablespoons of peanut butter. It’s meaningful, but it’s not going to single-handedly push you into a calorie surplus. Dedicated mass gainer shakes often contain 500 to 1,000+ calories per serving because they load up on carbohydrates and fats. Core Power is a high-protein, moderate-calorie drink, not a bulking shake.
Why It Still Works for Weight Gain
Gaining weight requires eating more calories than your body burns, typically 5 to 20% above your maintenance level. For someone who normally eats around 2,000 calories a day, that means an extra 100 to 400 calories daily. A single Core Power Elite bottle covers a big chunk of that surplus without requiring you to sit down to another full meal.
The real advantage is that liquid calories are much easier to consume than solid food when you’re already full. Research from the Proceedings of the Nutrition Society shows that liquids have a significantly lower satiating effect than solid foods. Your body essentially processes liquid calories without triggering the same fullness signals. In one study, participants who consumed extra calories in liquid form didn’t reduce their food intake for the rest of the day, while those who ate the same calories as solid food naturally ate less later. This means drinking a Core Power between meals is unlikely to kill your appetite for your next meal, letting those 230 calories stack on top of everything else you eat.
This low-satiety effect is actually one of the reasons health experts warn against sugary drinks for people trying to lose weight. But if you’re trying to gain, it works in your favor.
Building Muscle vs. Adding Fat
The 42g of protein in Core Power Elite is its biggest selling point for healthy weight gain. Protein is the raw material your muscles need to grow, and getting enough of it throughout the day matters more than almost any other dietary factor when you’re trying to add lean mass.
Research consistently shows that total daily protein intake is the strongest predictor of muscle growth, regardless of exactly when you drink it. The old idea that you need protein within 30 minutes of your workout has been largely debunked. A more effective approach is spreading your protein across three to four meals every three to four hours. Core Power fits neatly into this pattern as a between-meal addition or a post-workout option, whichever is more convenient for you.
Without strength training, extra calories will mostly become fat. Core Power’s high protein content gives your body the building blocks for muscle, but you still need the training stimulus to direct those nutrients toward lean tissue rather than fat storage.
How to Use It for Maximum Effect
The most effective strategy is drinking Core Power between meals rather than replacing a meal with it. Treat it as bonus calories. If you eat breakfast at 8 a.m. and lunch at noon, drink one around 10 a.m. Since liquid calories don’t suppress appetite the way solid food does, you should still be hungry for lunch on schedule.
You can also boost the calorie content by blending Core Power into a homemade shake. Adding a banana, a scoop of peanut butter, and a handful of oats to a Core Power bottle can push a single shake past 500 calories while keeping the protein high. This turns a moderate-calorie protein drink into something closer to a real weight gain shake, without the artificial ingredients found in many mass gainers.
If you’re starting from a low calorie intake, one bottle a day is a reasonable starting point. A conservative surplus of 5 to 10% above maintenance is enough to build muscle without excessive fat gain. You can always increase from there if the scale isn’t moving.
Where Core Power Falls Short
At roughly $4 to $5 per bottle, Core Power is one of the more expensive ways to get protein and calories. A gallon of whole milk delivers far more total calories and protein for less money, though it comes with lactose and more sugar. A tub of whey protein powder mixed with whole milk and peanut butter will also stretch further per dollar.
Core Power also can’t replace a well-rounded diet. It has very little fat, minimal carbohydrates, and none of the micronutrients you’d get from a real meal. It works best as a supplement to solid food, not a substitute for it. If you’re relying on multiple bottles a day to hit your calorie target, you’re likely missing out on the vitamins, minerals, and fiber your body needs.
For people who need a serious calorie boost (say, 500+ extra calories daily), Core Power alone is an inefficient way to get there. Pairing it with calorie-dense whole foods like nuts, avocados, whole grains, and cooking oils will get you to your surplus faster and more affordably.