"Did I just waste that entire workout because I didn't drink a protein shake within 30 minutes?" a member asks me this after finishing their last set of squats. It’s a fair question. Protein is getting a ton of hype right now (I say as I sip my pumpkin spice cold brew with “protein cold foam”). I spend a lot of time answering questions about protein, especially around strength training.
Much of the advice about how much protein you need and when to eat it makes eating feel like another workout to manage, but it doesn't have to be that complicated. By the end of this blog, you'll know how much protein makes sense for you and how to get there without tracking every gram.
What Does Protein Actually Do for Your Body?
After a strength training session, your muscles have worked hard and your body gets to work repairing and rebuilding that tissue. Protein supplies the amino acids for that process. Of the 20 amino acids that make up protein, nine are essential, which means your body can’t make them on its own. You have to get them through food. Protein also plays a part in immune function and hormone production.
Even on days you don’t train, your body continues its repair work. Muscle is constantly breaking down and rebuilding in a process called “muscle protein turnover,” and eating protein keeps the raw materials coming. Protein from food digests over several hours, so the supply arrives gradually rather than all at once.
Protein becomes even more important as you get older. Adults lose muscle mass with age, and that compounds in midlife and beyond when people are both eating less protein and strength training less (or not at all). As you know, keeping muscle is what lets you carry groceries up the stairs or get up from a low chair without thinking about it.
How Much Protein Do You Really Need?
You may have heard that you need 0.8 grams of protein per kilogram of body weight each day (or about ⅓ of a gram per pound). That's the old Recommended Dietary Allowance (RDA), the amount needed to prevent protein deficiency in healthy but mostly sedentary adults. For you, presumably an active person, that's pretty much the minimum. Someone who does strength training regularly needs more.
The current guidance is even higher. The 2025–2030 Dietary Guidelines for Americans recommend roughly 1.2 to 1.6 grams per kilogram per day for most adults, and which is the same range cited by recent clinical summaries.
If you strength train regularly, your needs may fall somewhere between 1.2 and 2.0 grams per kilogram per day. Your ideal range depends on your goals, your training volume, your age, and whether you're working to lose fat or build muscle. Two people at the same body weight can land in different places and both be right.
Here's the math for a 150-pound adult (that's about 68 kilograms:
At 1.2 grams per kilogram, you'd aim for roughly 82 grams of protein per day.
At 1.6 grams per kilogram, that comes to roughly 109 grams.
My advice is to aim for an amount somewhere in that zone and not worry about the exact decimal. Your individual needs can also change based on kidney health, existing medical conditions, pregnancy, and age. If you have a diagnosed health condition, ask your clinician or dietitian to help set a personal target before making major changes to your intake.
You don't need to track every gram forever. Most people do just fine when they aim for a reasonable range and check in occasionally as opposed to logging every meal day after day. If you want to know whether you're in range, a three-day food log once or twice a year can be very effective!
Does Eating More Protein Help You Gain Muscle?
Resistance training provides the signal that tells your body to build muscle, while protein supplies the raw materials. You need both!
If you eat extra protein without progressive strength training, that doesn’t make you stronger or leaner. Any protein beyond what your body needs gets used for energy or stored. It does not convert itself into muscle on its own.
For most people who lift weights, they stop seeing benefits after about 1.6 grams of protein per kilogram of body weight per day. Going higher isn't generally harmful if you have healthy kidneys, but it won't buy you extra muscle.
Here's how I explain this to members:
"I've seen members double their protein intake for two months and wonder why nothing changed. They were eating more, but they were not adding weight to the bar."
If you want to build muscle, you’ve got to progressively overload in your training. Add weight to the bar or add a rep, then give your body enough protein to support the work.
What Are the Best Sources of Protein?
The best protein sources are the ones that fit your life! What you like eating and what your budget allows is more important than any ranking of foods. There's room for both animal and plant foods in a strength training routine.
Animal proteins pack a lot of protein into a small serving. Three ounces of cooked chicken breast provides about 26 grams, and the same amount of cooked salmon provides about 22 grams. You'll get about 20 grams from 1 cup of Greek yogurt, 24 grams from 1 cup of cottage cheese, 12 grams from 2 large eggs, or 20 grams from 3 ounces of canned tuna.
Plant-based options can also contribute meaningfully to your daily intake. Here are some everyday examples:
Tofu, 1/2 cup: about 10 to 20 grams, depending on firmness
Tempeh, 1/2 cup: about 15 grams
Lentils, 1 cup cooked: about 18 grams
Chickpeas, 1 cup cooked: about 15 grams
Shelled edamame, 1 cup: about 18 grams
Quinoa, 1 cup cooked: about 8 grams
And yes, plant proteins DO support muscle growth. A 2026 systematic review and meta-analysis found only small differences in muscle protein synthesis between plant and animal sources, with a modest advantage for animal protein in adults over 65. If you eat mostly plant-based, you can still reach your target by spreading different sources across the day and getting enough total protein.
So start with foods you already enjoy!
The 30-Minute Window Is a Myth
"The thing I hear most often is that if you miss the 30-minute window after training, the session was wasted."
I want to put that one to rest. Your total daily protein intake is the strongest predictor of muscle adaptation. Timing does play a role, but it's a secondary factor.
The post-workout window is much wider than gym folklore suggests. Your muscles remain more responsive to protein for many hours after training, so there's no need to rush to the locker room with a shake. A 2024 randomized controlled trial found no meaningful difference between immediate and delayed post-workout protein when total daily intake was high.
A more practical approach is to aim for 25 to 35 grams of protein within a couple of hours after training. Across the rest of your day, aim for that same amount at each meal. Research suggests that roughly 25 to 35 grams per meal is close to the amount your body uses for muscle protein synthesis in one sitting.
Most people do just fine eating a normal meal within a couple of hours of finishing their workout. A bedtime protein snack is optional. Some people find it useful, especially if they're having trouble meeting their daily target.
If you want an easy post-workout option, a chicken and rice bowl or Greek yogurt with fruit both get the job done.
Do You Need Protein Powder?
Most people don’t need protein powder, but it can be a useful tool for some. I recommend it for practical reasons, when there's a gap between what someone needs and what they're able to eat.
Here's my professional rule of thumb:
"I suggest powder when two or more meals in a typical day are missing a palm-sized protein source, or when someone is consistently 20 to 30 grams short of their target and can’t close the gap with food."
It’s a good option when you have a tight morning schedule and it’s impossible to have a sit-down breakfast. I also suggest it when you have a low appetite or get full early, which happens often with older adults and people eating in a calorie deficit. Drinking protein can sometimes feel easier than eating another full meal. I also suggest it after training if you won't be able to eat a proper meal within a reasonable window.
However, I also tell some clients to skip it. If you're already hitting your target through whole foods, there's little reason to spend money on powder. I discourage using shakes as regular meal replacements. Don’t buy supplements just because the marketing is telling you you’re not getting enough..
If you do buy a powder, look for:
a recognizable protein source.
a third-party testing seal.
preferably low sugar.
Common Protein Myths
Myth 1: High protein intake damages healthy kidneys.
If your kidneys are healthy, higher protein intakes have not been shown to cause kidney damage. If you have existing kidney disease, your protein needs may be different. Work with your clinician to find an intake that makes sense for your health.
Myth 2: Plant protein is not good enough for building muscle.
Plant proteins support muscle growth, and the gap between plant and animal sources is small. If you eat mostly plant-based, spread different protein sources across your meals and aim to meet your total daily target. Foods like tofu, lentils, beans, and tempeh can absolutely fuel your strength training.
Myth 3: Eating more protein automatically causes weight gain.
Protein does not cause fat gain on its own. Excess calories drive weight gain, no matter where those calories come from. Protein also tends to keep you fuller than fat or refined carbohydrates, which can help you feel satisfied. If your goal is fat loss, eating enough protein helps you hold onto muscle while you eat less overall.
Making Protein Work for Your Routine
You don't need a food scale to get a reasonable amount of protein at each meal. I like the handful approach: start with one palm-sized portion of a protein food at each meal. For most adults, that gets you close to your daily range without weighing or logging everything. A palm-sized portion of cooked meat, fish, or tofu provides roughly 25 to 35 grams of protein, depending on the food.
Here's what a realistic day might look like for a 150-pound adult aiming for around 95 to 105 grams:
Breakfast: two eggs and three quarters of a cup of Greek yogurt with berries (about 25 grams)
Lunch: a palm-sized portion of chicken or tofu to a large salad with chickpeas (about 30 grams)
Snack: cottage cheese with black pepper and a piece of fruit, or a handful of edamame (about 15 grams)
Dinner: a palm-sized portion of salmon or lentils with rice and vegetables (about 30 grams)
That brings you to roughly 100 grams for the day. If you don’t get enough protein through your meals, have a glass of milk or a small scoop of protein powder for another 15 to 25 grams.
There are two habits that can make this easier. Build each meal around its protein source first, then add the rest. That’s a lot easier than trying to squeeze protein into a meal you already planned. And keep two or three ready-to-eat options in your fridge, such as Greek yogurt or cottage cheese, so you have something quick when the day gets busy.
If you want help turning these ideas into a routine that fits your life, Dirty Water Fitness offers nutrition counseling and personal training. I can work with you to create a nutrition plan that fits your goals and your life.
