New CDC data shows modest age differences in protein’s share of calories. Here’s how to read the findings without turning averages into personal targets.
In October 2026, the CDC’s National Center for Health Statistics (NCHS) published Data Brief No. 573 on protein consumption in the United States. Using National Health and Nutrition Examination Survey (NHANES) data, it reported that adults aged 20 and older obtained an average 15.5% of their calories from protein on a given day during August 2021 to August 2023.
For women thinking about nutrition alongside skin and hair care, the useful story is not simply that older adults reported a lower figure. It is that a precise measurement deserves a precise interpretation.
Protein’s calorie share describes how much of the energy in a reported day’s diet came from protein. It is a way of describing the composition of that diet, rather than a direct count of protein eaten.
That distinction is central to the biological interpretation. The brief’s primary finding is about eating patterns, not a mechanism inside skin or hair cells. There is no new cellular finding here to turn into a beauty recommendation.
Think of the percentage as a description of the reported day’s food balance. It answers a question about protein’s place within total calories. Questions about someone’s actual intake and questions about a visible health outcome require different information.
The CDC analysis used reliable Day 1 dietary recall data from 4,735 adults. Its age-group averages for protein as a share of calories were:
The result for adults aged 60 and older was statistically lower than both younger groups. The brief did not report significant age differences within each sex.
Across adults overall, males obtained 15.7% of calories from protein and females obtained 15.3%. The CDC reported a statistically significant difference between those overall figures.
The brief also reported a significant downward trend in adults’ calorie share from protein. It was 16.1% in 2013 to 2014 and 15.5% in August 2021 to August 2023.
Food-source rankings add another layer of context. Among adults overall, the largest reported contributions to total protein intake came from:
These food-category percentages use a different denominator: total protein intake rather than total calories. Keeping the two measures separate matters when reading the brief or a headline based on it.
Among adults aged 60 and older, the leading sources were sandwiches at 14.4% and poultry at 8.3%. Mixed meat dishes contributed 7.0% and meat contributed 6.6%. Eggs completed the top five at 4.7%. Plant-based protein foods appeared among the top five for adults aged 40 to 59.
These rankings make the report more concrete without changing its purpose. They show where reported protein came from across the population. They are most useful as context for the headline figure, rather than as a shopping list.
NHANES is a cross-sectional survey that represents the U.S. civilian, noninstitutionalized population. That makes this a population snapshot, not a controlled trial of a change in protein intake.
The estimates come from a 24-hour dietary recall and describe intake on a given day. They are not a long-term assessment of each participant’s usual diet.
The measurement also has a specific boundary. A lower calorie share does not establish protein inadequacy or reveal an individual’s grams consumed per day. It does not supply protein intake per kilogram of body weight or determine whether someone meets a recommended intake.
The brief did not investigate why the reported trend occurred. It also did not connect these patterns with skin, hair, collagen or healthy-aging outcomes. Statistical significance in a dietary comparison is therefore not evidence of a visible beauty effect.
Collection methods changed between survey periods. Before the pandemic pause, the first dietary recall took place in person during the mobile examination center visit. During August 2021 to August 2023, both recalls were conducted by telephone after that visit. The trend should be read with that change in view.
For a beauty-longevity routine, the practical move is to use this news as context rather than a number to chase. The report offers a reason to read protein messaging carefully, while personal decisions remain separate from the population headline.
Check whether a protein claim concerns a share of calories, an amount consumed or a measured health outcome. Those are different questions. Match the claim to the kind of evidence offered instead of letting a single percentage stand in for all three.
For related reading, Younell’s discussion of protein needs later in life addresses the broader healthy-aging question. Keep that question distinct from the calorie-share statistic in this brief.
When assessing protein-focused beauty content, look for a clear explanation of what was measured and which foods contributed. The CDC’s food categories give that discussion a concrete starting point: reported eating patterns rather than a product narrative.
If a headline prompts you to consider a powder, pause at the question of your own needs first. Younell’s guide to putting protein needs before supplement shopping offers a related place to continue reading.
This is also a useful way to approach the rest of a daily beauty routine. Before treating a nutrition headline as a reason to buy something, identify the decision you are actually trying to make. A food-pattern report belongs in your information gathering. A personal hair concern belongs in a conversation about its cause.
The American Academy of Dermatology (AAD) says hair-loss care begins by finding the cause. Care depends on that cause and the person’s circumstances.
The AAD also says a dermatologist can advise someone who is not getting enough protein on how to increase intake. For women concerned about hair changes, that supports discussing intake within an individual evaluation rather than deciding on a dietary change from the CDC average.
This brief gives healthy-aging coverage a useful population reference point. It also sharpens the question that matters for beauty science: how future evidence might connect detailed dietary intake with outcomes people can actually notice.
Will future research link protein intake with measured skin and hair outcomes in ways that make nutrition guidance more useful for women over time?
Stay connected for research and practical guidance on skin, hair, collagen, nutrition and beauty longevity. Clear ideas for people who want to understand how appearance changes with age and make better-informed choices over time.
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