Four in five foods sold in Brazilian supermarkets contain additives
Em supermercados brasileiros, onde quase nenhum corredor escapa à lógica industrial, um estudo inédito revelou que quatro em cada cinco produtos embalados contêm aditivos alimentares — substâncias que servem à máquina produtiva muito mais do que ao corpo humano. A pesquisadora Vanessa Montera analisou mais de 9.800 itens e encontrou não apenas a onipresença desses compostos, mas a crescente preocupação científica sobre seus efeitos na saúde ao longo do tempo. Entre a defesa regulatória e a cautela dos pesquisadores, o que está em jogo é uma pergunta antiga: o que, afinal, estamos comendo?
- Um levantamento sem precedentes no Brasil expôs que 80% dos alimentos industrializados em supermercados contêm aditivos, e um quarto deles acumula seis substâncias ou mais em uma única embalagem.
- Pesquisadores associam esses compostos a transtornos mentais, alergias, obesidade e câncer, criando uma tensão crescente entre a ciência independente e os padrões aprovados pelos órgãos reguladores.
- A Anvisa e os fabricantes sustentam que os aditivos são seguros dentro dos limites internacionais, mas admitem que o debate científico ainda não chegou a um consenso definitivo.
- Enquanto a disputa se desenrola em laboratórios e escritórios regulatórios, especialistas orientam consumidores a ler rótulos e tratar a presença de múltiplos aditivos como um sinal de alerta prático.
Entre na maioria dos supermercados brasileiros e pegue qualquer produto embalado: a chance de ele conter aditivos é de quatro em cinco. Essa é a conclusão do estudo da nutricionista Vanessa Montera, o primeiro de tal escala no país, que analisou mais de 9.800 produtos e encontrou aditivos em quase 80% deles. Um quarto desses itens continha seis substâncias ou mais.
Os aditivos não existem para nutrir. Eles prolongam a validade, reduzem custos e, sobretudo, restauram o que o processamento industrial destrói: cor, textura, sabor, aparência. Um cereal precisa parecer dourado. Um iogurte precisa ter consistência. Um refrigerante precisa ter gosto de algo desejável. Os aditivos cosméticos cumprem esse papel. Aromatizantes apareceram em 47,1% dos produtos analisados; conservantes, em 28,9%; corantes, em 27,8%; estabilizantes, em 27,6%.
Tudo isso é legal. Tudo isso é, segundo a Anvisa e os fabricantes, seguro dentro dos limites aprovados. Mas pesquisadores apontam associações entre esses compostos e transtornos mentais, alergias, obesidade e câncer — e pedem mais cautela da indústria. O consenso científico ainda não chegou, e o debate segue aberto enquanto as pessoas enchem seus carrinhos.
A orientação prática dos especialistas é simples: leia os rótulos. Evite ultraprocessados. Num supermercado onde quatro de cada cinco itens contêm aditivos, prestar atenção ao que se compra tornou-se, por si só, um ato de autocuidado.
Walk into any Brazilian supermarket and pick up nearly any packaged item. Chances are better than four in five that you're holding something laced with additives—substances added not to nourish you, but to preserve, color, thicken, sweeten, or otherwise engineer the product into something the industrial food system needs it to be.
A study by nutritionist Vanessa Montera, the first of its scale in Brazil, examined more than 9,800 supermarket products and found that nearly 80 percent contained at least one additive. One quarter of those products contained six or more. The research, unprecedented in its scope, offers a stark portrait of what Brazilians are actually eating when they buy processed food.
Additives themselves are not inherently sinister. The food industry uses them for practical reasons: to make products last longer on shelves, to get them to more people, to keep prices down. But many serve a different purpose entirely. Industrial processing can strip food of its original character—changing its smell, taste, texture, leaving it unrecognizable. Manufacturers turn to what researchers call cosmetic additives to restore what consumers expect to find. A cereal should look golden. A yogurt should hold together. A soft drink should taste like something people want to drink. Additives make that possible.
Flavorings appeared in nearly half of all products studied—47.1 percent. Preservatives showed up in 28.9 percent, colorants in 27.8 percent, stabilizers in 27.6 percent. The list continues: emulsifiers, antioxidants, thickeners, flavor enhancers, acidity regulators, sweeteners, chemical leavening agents. Each serves a function. Each is legal. Each is, according to manufacturers and Brazil's National Health Surveillance Agency (Anvisa), safe at approved levels.
But the scientific picture is murkier than regulators suggest. Researchers increasingly link additives to mental health disorders, allergies, obesity, and cancer. They point to studies showing connections and call for greater caution from the food industry. Manufacturers and Anvisa push back, arguing that evidence remains weak and that additives used within international safety standards pose no meaningful risk. The science has not yet reached consensus. The debate continues in regulatory offices and research labs while people buy groceries.
The practical advice from experts is straightforward: read labels. Look at ingredient lists. Avoid ultraprocessed foods. If a product contains many additives, that itself is a signal—a sign that what you're buying is more industrial product than food. The presence of additives is not always a warning light, but it is a marker worth noticing. In a supermarket where four of every five items contain them, paying attention becomes a form of self-defense.
Notable Quotes
Researchers say studies link additives to mental disorders, allergies, obesity, and cancer, calling for greater caution from the food industry— Various researchers cited in the study
Manufacturers and Anvisa respond that evidence is weak and additives can be used safely at levels following international standards— Food manufacturers and Brazil's National Health Surveillance Agency (Anvisa)
The Hearth Conversation Another angle on the story
Why does the food industry add so many of these substances if they're not feeding us?
Because the industrial process itself destroys what food naturally is. You can't ship fresh bread across the country. You can't keep yogurt stable for months. Processing breaks things down, changes them. Additives are how manufacturers put them back together into something people will recognize and buy.
So it's not malice, it's just the cost of scale?
Partly. But there's also profit in it. A cheaper stabilizer costs less than reformulating a product. A flavor enhancer makes mediocre ingredients taste better. The system rewards additives.
Why haven't regulators banned the ones linked to health problems?
Because the evidence is contested. Manufacturers say the studies are weak, that safe levels are safe. Regulators agree. But researchers keep finding associations—with cancer, with obesity, with mental disorders. No one has proven causation definitively. So we're in a zone of uncertainty.
What's the practical move for someone buying groceries?
Read the label. If it has six additives, it's telling you something about what it is. You can't avoid them entirely in a modern supermarket, but you can choose products with fewer. That's the only real power you have right now.
Does knowing this change how you think about food?
It makes you realize that what you're buying isn't always what you think it is. A strawberry yogurt isn't strawberries and milk. It's a formula. Once you see that, you can't unsee it.