Protein Powder Label Guide: What to Look For After 40

When you buy a protein powder, look for five things on the label: a protein listed as the first ingredient, about 20 to 30 grams of protein per serving, little or no added sugar (no more than 10 grams), a short ingredient list you can understand, and a third-party testing seal such as NSF Certified for Sport or Informed Choice. If the sugar line is close to the protein line, you're holding a sugar drink with some protein in it.

And if you're over 40, the bigger question is how much protein you need in a day. For most active adults it's more than the 0.8 grams per kilogram you've probably heard. Here's my 60-second label check, what the research says about daily protein, and what's in my own shaker.

What should I look for in a protein powder?

Flip the tub over. The front is marketing; the back is the truth. The Supplement Facts or Nutrition Facts panel shows the protein, sugar, and added sugar in one serving. The ingredient list runs from most to least by weight, so whatever comes first is what you're mostly paying for. A good powder is boring: protein first, a real dose, low sugar, and a list you can pronounce.

Is your shake a protein drink with sugar, or a sugar drink with protein?

In grad school, a classmate brought up a popular "nutrition" shake. On the label, the first ingredients after water were sweeteners, not protein. So I asked: is that a protein drink with sugar, or a sugar drink with protein? Formulas change, but the question works on any shake or powder:

• Look at the first three ingredients. If "sugar," "syrup," or a word ending in "-ose" (like dextrose) shows up before a protein, that's a red flag. That's how the U.S. Dietary Guidelines say to spot added sugars.
• Compare added sugar to protein. The 2025-2030 Dietary Guidelines say one meal should contain no more than 10 grams of added sugars. If your shake is over that and creeping toward the protein number, put it back.

How much protein do you need after 40?

The Recommended Dietary Allowance (RDA) is 0.8 grams of protein per kilogram of body weight per day. It's set to cover nearly all healthy adults, but it's a minimum, not a target for keeping muscle. Experts aim higher:

• Adults 65 and older: at least 1.0 to 1.2 g/kg per day, and 1.2 or more if active (PROT-AGE study group; ESPEN).
• All adults, per the 2025-2030 U.S. Dietary Guidelines: 1.2 to 1.6 g/kg per day, adjusted for calorie needs. The guidelines note older adults may need fewer calories but the same or more protein.
• People who train hard: 1.4 to 2.0 g/kg per day (International Society of Sports Nutrition).

There's no separate official number for your 40s and 50s, but the guidance points one way: if you're active and want to keep your muscle, aim above 0.8. For a 180-pound person (about 82 kg), that's about 65 grams a day at 0.8, 98 grams at 1.2, and 131 grams at 1.6.

Spread it out. PROT-AGE suggests about 25 to 30 grams of protein per meal, with about 2.5 to 2.8 grams of the amino acid leucine. I explain why that leucine number matters in The Leucine Trigger.

One caution: if you have kidney disease, talk to your doctor before raising your protein. PROT-AGE notes that people with severe kidney disease who aren't on dialysis may need to limit it.

How much protein should be in one scoop?

Aim for about 20 to 30 grams of protein per serving. That matches the research: a U.S. military expert panel called 20 to 25 grams per serving acceptable (Pasiakos et al., 2013), PROT-AGE suggests 25 to 30 grams per meal for older adults, and the International Society of Sports Nutrition suggests 20 to 40 grams per dose. Check how many scoops make one serving on the label; it isn't always one.

What did the military protein study find?

In 2013, an expert panel working with the U.S. Armed Forces reviewed whether protein supplements help service members and whether they're safe. Their consensus:

• Most protein should come from high-quality whole foods. When meals aren't practical, a 20 to 25 gram supplement is acceptable, especially after hard training.
• Needs rise to about 1.5 to 2.0 g/kg per day under heavy demand with too few calories. Otherwise, 0.8 to 1.5 g/kg covers it.
• Protein supplements generally appear to be safe for healthy adults, but quality control and contamination are real concerns.

Real food comes first. A shake is a tool for when real food isn't convenient.

Can protein powder be contaminated?

Yes, and that's why I look for a testing seal. The FDA does not approve dietary supplements before they're sold; the company is responsible for safety and labeling. Contamination and undeclared drugs are documented problems (Maughan, 2013). In October 2025, Consumer Reports tested 23 protein powders and shakes and found that in more than two-thirds of them, a single serving had more lead than Consumer Reports' own level of concern for a whole day. Plant-based products had the most lead on average. (Every product did deliver the protein its label promised.)

A third-party seal helps:

• NSF Certified for Sport screens for more than 295 banned substances and also checks for contaminants such as heavy metals.
• Informed Choice screens for more than 285 banned substances and keeps buying products off store shelves to test them each month.

Neither seal is a guarantee. The U.S. Anti-Doping Agency says certification lowers the risk but doesn't eliminate it. Still, tested beats untested.

What do the ingredients on a protein powder label mean?

• Whey, casein, or milk protein: dairy proteins, so skip them if dairy bothers you.
• Egg white (egg albumin), pea, or soy: dairy-free proteins.
• Xylitol and other sugar alcohols: low-calorie sweeteners. Large amounts can upset your stomach, and xylitol is dangerous for dogs. A 2024 study linked high blood xylitol to heart attack and stroke risk, but that's early research and doesn't prove cause and effect.
• Stevia: a no-calorie sweetener. The FDA allows highly purified stevia extracts in food, but not whole leaves or crude extracts.
• Natural flavor: flavoring from a natural source, like a plant extract. By law it's there for taste, not nutrition.
• Xanthan gum and lecithin: a thickener made by fermentation, and a fat-based ingredient that helps the powder mix smoothly.

The 2025-2030 Dietary Guidelines advise limiting low-calorie sweeteners as well as added sugar, so a short, simple list is the goal.

What protein powder do I use?

I'm lactose intolerant, so I use an egg white protein. No whey, no milk. I don't drink a shake every day, or even every week. Most of my protein comes from food.

When I do make one, I blend a scoop of vanilla with fresh oranges, a banana, water, and ice. It tastes like a creamsicle, and the fruit gives me real food with my protein instead of syrup.

Phil's 60-second protein powder label check (5 steps)

1. Find the protein number. Look for about 20 to 30 grams per serving, and check how many scoops a serving is.
2. Read the first ingredient. It should be a protein (whey, casein, egg, pea, soy, and so on), not a sugar or filler.
3. Compare added sugar to protein. Keep added sugar at 10 grams or less. Watch for "sugar," "syrup," and words ending in "-ose."
4. Count the ingredients. Shorter is better. You should know what most of them are.
5. Look for a seal. NSF Certified for Sport or Informed Choice means an outside lab tested it.

Frequently asked questions

What should I look for in a protein powder?

A protein as the first ingredient, about 20 to 30 grams of protein per serving, 10 grams or less of added sugar, a short ingredient list, and a third-party testing seal like NSF Certified for Sport or Informed Choice.

How much protein do I need a day after 40?

The RDA is 0.8 g per kilogram of body weight, but that's a minimum. Experts recommend at least 1.0 to 1.2 g/kg for adults 65 and older, and the 2025-2030 U.S. Dietary Guidelines suggest 1.2 to 1.6 g/kg for adults. Active people should aim toward the higher end.

Is protein powder safe?

For healthy adults, protein supplements generally appear to be safe, according to a U.S. military expert panel. The bigger risk is quality: the FDA doesn't approve supplements before sale, and tests have found lead and other contaminants in some powders. Choose a third-party tested product, and talk to your doctor first if you have kidney disease.

Do I need protein powder at all?

No. The military expert panel strongly urged whole food first. A powder is a convenient backup when you can't get a real meal, especially after training.

The bottom line

Before you buy, flip the tub over. Protein first, about 20 to 30 grams a serving, little to no added sugar, a short list, and a testing seal. Then make sure you're getting enough protein for the whole day, because after 40, 0.8 is the floor, not the goal.

Protein feeds the muscle, but training is what tells your body to keep it. If you want a program that builds strength, mobility, and conditioning at any age, the Body Bell Method coaches you step by step, and the Master Phil app puts the workouts in your pocket. Visit bodybellmethod.com to get started. For more on why strength training matters as you age, read How to Build Muscle After 50.

References

• Bauer, J., Biolo, G., Cederholm, T., Cesari, M., Cruz-Jentoft, A. J., Morley, J. E., Phillips, S., Sieber, C., Stehle, P., Teta, D., Visvanathan, R., Volpi, E., & Boirie, Y. (2013). Evidence-based recommendations for optimal dietary protein intake in older people: A position paper from the PROT-AGE Study Group. Journal of the American Medical Directors Association, 14(8), 542-559. https://doi.org/10.1016/j.jamda.2013.05.021
• Consumer Reports. (2025, October). Protein powders and shakes contain high levels of lead. https://www.consumerreports.org/lead/protein-powders-and-shakes-contain-high-levels-of-lead-a4206364640/
• Deutz, N. E. P., Bauer, J. M., Barazzoni, R., Biolo, G., Boirie, Y., Bosy-Westphal, A., Cederholm, T., Cruz-Jentoft, A., Krznariç, Z., Nair, K. S., Singer, P., Teta, D., Tipton, K., & Calder, P. C. (2014). Protein intake and exercise for optimal muscle function with aging: Recommendations from the ESPEN Expert Group. Clinical Nutrition, 33(6), 929-936. https://doi.org/10.1016/j.clnu.2014.04.007
• Informed Choice. (n.d.). Certification process. https://choice.wetestyoutrust.com/about/certification-process
• Institute of Medicine. (2005). Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. The National Academies Press. https://doi.org/10.17226/10490
• Jäger, R., Kerksick, C. M., Campbell, B. I., Cribb, P. J., Wells, S. D., Skwiat, T. M., Purpura, M., Ziegenfuss, T. N., Ferrando, A. A., Arent, S. M., Smith-Ryan, A. E., Stout, J. R., Arciero, P. J., Ormsbee, M. J., Taylor, L. W., Wilborn, C. D., Kalman, D. S., Kreider, R. B., Willoughby, D. S., ... Antonio, J. (2017). International Society of Sports Nutrition position stand: Protein and exercise. Journal of the International Society of Sports Nutrition, 14, 20. https://doi.org/10.1186/s12970-017-0177-8
• Mäkinen, K. K. (2016). Gastrointestinal disturbances associated with the consumption of sugar alcohols with special consideration of xylitol: Scientific review and instructions for dentists and other health-care professionals. International Journal of Dentistry, 2016, 5967907. https://doi.org/10.1155/2016/5967907
• Maughan, R. J. (2013). Quality assurance issues in the use of dietary supplements, with special reference to protein supplements. The Journal of Nutrition, 143(11), 1843S-1847S. https://doi.org/10.3945/jn.113.176651
• NSF. (n.d.). NSF Certified for Sport. https://www.nsfsport.com/
• Pasiakos, S. M., Austin, K. G., Lieberman, H. R., & Askew, E. W. (2013). Efficacy and safety of protein supplements for U.S. Armed Forces personnel: Consensus statement. The Journal of Nutrition, 143(11), 1811S-1814S. https://doi.org/10.3945/jn.113.176859
• U.S. Anti-Doping Agency. (n.d.). Supplement risk and NSF Certified for Sport. https://www.usada.org/dietary-supplements/supplement-risk-nsf-certified-for-sport/
• U.S. Department of Agriculture & U.S. Department of Health and Human Services. (2026). Dietary Guidelines for Americans, 2025-2030. https://cdn.realfood.gov/DGA.pdf
• U.S. Food and Drug Administration. (n.d.). Aspartame and other sweeteners in food. https://www.fda.gov/food/food-additives-petitions/aspartame-and-other-sweeteners-food
• U.S. Food and Drug Administration. (n.d.). Dietary supplements. https://www.fda.gov/food/dietary-supplements
• U.S. Food and Drug Administration. (n.d.). Paws off xylitol; it's dangerous for dogs. https://www.fda.gov/consumers/consumer-updates/paws-xylitol-its-dangerous-dogs
• Witkowski, M., Nemet, I., Li, X. S., Wilcox, J., Ferrell, M., Alamri, H., Gupta, N., Wang, Z., Tang, W. H. W., & Hazen, S. L. (2024). Xylitol is prothrombotic and associated with cardiovascular risk. European Heart Journal, 45(27), 2439-2452. https://doi.org/10.1093/eurheartj/ehae244

Adapted from Phil Ross's graduate coursework (2018), updated with verified sources for 2026.