The shaker is there, the hand reaches for it, and the action becomes automatic.
At the dinner table, the saltshaker sits within easy reach. Whether someone actually picks it up turns out to depend on a surprisingly complex mix of gender, living situation, diet, and geography — at least among older Brazilians, according to a new study published in Frontiers in Public Health.
Researchers at Rio de Janeiro State University drew on survey data collected in 2016 and 2017 from more than 8,300 Brazilian adults aged 60 and older. Participants were asked to recall what they had eaten in the previous 24 hours and whether they habitually added salt to food after it was already cooked. The team then looked at how that behavior tracked against a range of variables: sex, age, education, income, whether someone lived alone, urban or rural residence, and dietary patterns including consumption of ultra-processed foods, fruits, and vegetables.
The headline finding is straightforward enough: men reach for the salt more than women do. Among the study's participants, 12.7 percent of men reported the habit compared to 9.4 percent of women. But the more interesting story is in what drives the behavior for each group — and how differently those drivers operate.
For men, the picture is relatively simple. Only two factors showed a significant association with adding extra salt. Men who were following a special diet for high blood pressure were less than half as likely to shake on the extra sodium as those with no such dietary restriction. And men who lived alone were 62 percent more likely to add salt than those sharing a household. The researchers read this as suggesting that men's salt habits are less tightly woven into their broader dietary identity — more a matter of circumstance than of pattern.
Women's behavior told a richer, more layered story. Women who were not managing high blood pressure through diet had 68 percent higher odds of adding salt. Those living in urban areas, or who regularly ate ultra-processed foods, were roughly twice as likely to do so. But women who ate fruit regularly were 81 percent less likely to add salt, and those who ate vegetables regularly were 40 percent less likely. The researchers suggest this reflects a broader orientation toward diet quality — women who pay attention to what they eat in one domain tend to carry that attention across the board.
The finding about ultra-processed foods is worth sitting with. These products are typically already high in sodium, and eating them frequently may recalibrate the palate toward saltier flavors overall. There is a physiological logic here: repeated exposure to high-sodium food can dull sensitivity to saltiness, nudging people to want more of it. But the researchers also note that adding salt at the table can be as much about habit as about taste — the shaker is there, the hand reaches for it, and the action becomes automatic.
The study's authors are careful about what the data can and cannot say. The research captures associations, not causes. The salt-adding behavior was self-reported, which introduces the possibility of recall errors or social desirability bias. And dietary habits may well have shifted in the nearly decade since the surveys were conducted. Still, the patterns are consistent enough to carry practical weight.
Salt added after cooking accounts for somewhere between 6 and 20 percent of total daily sodium intake — a meaningful slice when the World Health Organization recommends adults stay under five grams of salt per day, a threshold that excess consumption of any kind can push past. The health consequences of going over that limit are well-documented: elevated blood pressure, cardiovascular strain, kidney stress, and, more recently, evidence linking high sodium intake to accelerated cognitive decline.
What the Brazilian researchers want policymakers to take from their work is that one-size-fits-all salt reduction campaigns are likely to underperform. Messaging that resonates with a man living alone may land very differently than messaging aimed at an urban woman who eats processed food regularly. Tailoring public health interventions to gender and lifestyle context, they argue, is not a nicety — it is a matter of effectiveness.
On the practical side, the suggestions are modest but concrete: swap the saltshaker for herbs or citrus-based acidity, use cooking techniques that build flavor without sodium, and — perhaps most simply — stop putting the saltshaker on the table by default. If it is not within reach, the habit has nowhere to go.
Notable Quotes
Adding salt to food at the table remains a relatively common habit among Brazilian older adults and occurs more frequently among men than among women.— Dr. Flávia Brito, associate professor at Rio de Janeiro State University
Practical strategies, such as avoiding the routine placement of saltshakers on the table, may help reduce habitual salt use.— Dr. Débora Santos, titular professor at Rio de Janeiro State University
The Hearth Conversation Another angle on the story
Why does it matter whether someone adds salt at the table versus during cooking?
Because it's one of the few sodium inputs people actually control. Most salt in modern diets is baked into processed food before it ever reaches you. The table is where individual behavior still has leverage.
Why focus specifically on older adults?
A few reasons. Older adults carry more accumulated risk from high blood pressure and cardiovascular disease. They also tend to have more established habits — the kind that are harder to shift but also more predictable to study.
The gap between men and women isn't enormous — 12.7 versus 9.4 percent. Does that difference actually matter?
At a population scale, yes. And the more important finding isn't the gap itself but what's behind it. Men's behavior is driven by very few factors. Women's behavior is entangled with a whole web of dietary and social patterns. That asymmetry has real implications for how you design an intervention.
What's the significance of men who live alone being more likely to add salt?
It probably reflects the absence of a moderating social environment. Cooking for yourself, eating alone — there's no one else's preferences to accommodate, no shared meal culture shaping the table. The saltshaker becomes a small, unchecked autonomy.
And women in urban areas being twice as likely to add salt — what's driving that?
The researchers don't pin it down definitively, but urban environments tend to mean more access to ultra-processed food, more eating outside the home, more exposure to high-sodium flavor norms. It compounds.
The fruit and vegetable finding is striking. Is that really about salt, or just about being a certain kind of person?
Probably both. There's likely a genuine dietary coherence at work — people who prioritize fresh food tend to be more attentive to sodium. But you're right that it also signals a broader health orientation that's hard to fully disentangle from the salt question specifically.
What would a well-designed public health campaign actually look like, given these findings?
Different messages for different audiences. For men living alone, maybe something about the social context of eating — who you cook for, what that changes. For women in urban areas, something that addresses ultra-processed food as the upstream problem. Generic 'eat less salt' messaging doesn't have much to grab onto.