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Study links common food preservatives to higher risk of hypertension, heart disease

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A new French study has linked several common food preservatives used in store-bought foods to an increased risk of high blood pressure and cardiovascular diseases, raising fresh concerns about the health effects of additives commonly found in processed and ultra-processed foods.

The study, published in the European Heart Journal, found that people who consumed higher amounts of certain preservatives were more likely to develop hypertension, heart attacks and stroke over time.

Researchers analysed data from more than 112,000 participants enrolled in the NutriNet-Santé cohort, an ongoing French nutrition and health study that has tracked dietary habits since 2009.

Burden of heart disease in Nigeria

The findings come as Nigeria continues to face a growing burden of non-communicable diseases, particularly cardiovascular conditions such as hypertension, stroke and heart disease.

Hypertension, commonly known as high blood pressure, occurs when the force of blood pushing against the walls of blood vessels remains consistently too high. Over time, the condition can damage blood vessels and increase the risk of stroke, heart failure and kidney disease.

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A stroke occurs when blood supply to part of the brain is blocked or when a blood vessel in the brain bursts, potentially causing paralysis, speech problems or death.

Heart attacks happen when blood flow to part of the heart becomes blocked, preventing oxygen from reaching heart muscles.

According to a report by PREMIUM TIMES, health experts and existing reports, hypertension remains one of the most common non-communicable diseases in Nigeria, with many cases undiagnosed until complications develop.

Preservatives linked to cardiovascular risk

According to the findings, preservatives used to prevent spoilage caused by bacteria, mould and yeast were associated with significantly higher cardiovascular risks.

The study reported that higher consumption of these preservatives was linked to a 29 per cent greater risk of elevated blood pressure and a 16 per cent increased risk of heart attacks and stroke.

Researchers identified three “non-antioxidant” preservatives strongly associated with hypertension. These include potassium sorbate, potassium metabisulphite and sodium nitrite.

Potassium sorbate is commonly used in baked goods, cheeses, sauces and wine, while potassium metabisulphite is often found in wine, juice, cider and beer.

Sodium nitrite is widely used in processed meats such as bacon, ham and deli meats.

The study also found that several antioxidant preservatives, often described as “natural”, were associated with increased cardiovascular risk.

These include ascorbic acid, sodium ascorbate, sodium erythorbate, citric acid and rosemary extracts, which are commonly used to prevent foods from turning brown or rancid.

Higher intake of these antioxidant preservatives was associated with a 22 per cent greater risk of high blood pressure.

Ascorbic acid, also known as vitamin C, was specifically linked to cardiovascular disease in the study.

Researchers noted that although ascorbic acid and citric acid naturally occur in fruits and vegetables, additives used in processed foods may not have the same health effects as naturally occurring compounds.

Ultra-processed foods under scrutiny

The findings add to growing evidence linking ultra-processed foods to poor health outcomes.

Researchers noted that preservatives are not limited to ultra-processed foods alone, as earlier findings showed that only about 35 per cent of preservative intake came from ultra-processed products.

Still, the study highlighted the widespread presence of preservatives across many commonly consumed foods and reinforced recommendations encouraging people to consume more fresh and minimally processed foods.

Researchers advised consumers to prioritise fresh, uncooked and minimally processed foods where possible.

Frozen foods preserved through low temperatures rather than additives were also identified as preferable alternatives.

Long-term dietary tracking

To conduct the research, participants recorded all foods and drinks consumed over three days every six months, including brand names.

Researchers then matched these records with ingredient databases to estimate preservative exposure over several years.

Medical records from the French national healthcare system were used to track diagnoses of hypertension and cardiovascular disease over the study period.

The researchers examined 58 preservatives in total and conducted detailed analysis on 17 additives consumed by at least 10 per cent of participants. Eight of those preservatives were associated with increased hypertension risk over the following decade.

READ ALSO: WHO, EU launch health support project as Nigeria battles multiple disease outbreaks

Links to cancer, diabetes

The study builds on previous research linking similar preservatives to increased risks of cancer and type 2 diabetes.

Earlier findings identified preservatives such as sodium nitrite, potassium nitrate, sorbates, potassium metabisulphite, acetates and acetic acid as being associated with higher risks of prostate cancer, breast cancer and other cancers.

Several of the same preservatives were also previously linked to a significantly increased risk of developing type 2 diabetes.

Although the researchers noted that the findings do not establish direct cause and effect, they said the results highlight the need for further investigation into the long-term health effects of food additives and preservatives.

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Health

DRC Ebola outbreak remains active as death toll reaches 3,779 – Africa CDC

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The Africa Centres for Disease Control and Prevention (Africa CDC) says the Ebola outbreak in the Democratic Republic of the Congo (DRC) remains active, with 7,820 cases and 3,779 deaths recorded nationwide.

Wessam Mankoula, regional director at the Northern Africa Regional Coordinating Centre, Africa CDC, said this during a Thursday webinar on the Ebola outbreak in the DRC and ongoing response efforts.

Mr Mankoula said the outbreak had affected 63 health zones across seven provinces, with 49 health zones still in the active phase and continuing to report cases across the DRC during response operations.

He said eight health zones had entered the sustained controlled phase, while six others were in the controlled phase after reporting no cases for specified periods under routine monitoring.

According to him, the outbreak has plateaued over the past five weeks, partly driven by declining cases in Ituri, the epicentre of the outbreak in DRC, and surrounding areas.

He, however, cautioned against interpreting the decline as evidence that the outbreak was under control, noting that some provinces were still recording upward trends in several affected provinces.

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Mr Mankoula said cases in Ituri declined by 25 per cent during the latest three-week period, while deaths dropped by 31 per cent compared with the previous three weeks overall, as recently reported.

He said North Kivu recorded a different trend, with cases increasing by 56 per cent and deaths rising by 19 per cent during the same three-week period there, in recent weeks.

The official said North Kivu also recorded the highest case-fatality ratio of about 60.5 per cent, compared with the national average of approximately 48 per cent during the outbreak period.

He attributed the situation partly to insecurity and limited access to affected communities, which were making active case searches and contact tracing increasingly difficult for health workers in affected areas.

Mr Mankoula said children below five years were among the most affected groups, prompting collaboration with UNICEF to strengthen case management for paediatric patients in affected areas in the region as needed.

He said community transmission remained a major concern, with about 65 per cent of reported cases occurring within communities, requiring stronger engagement and deployment of community health workers across affected communities.

Mr Mankoula said the contact listing had improved from about 10 contacts per case at the beginning of the outbreak to approximately 20 per case in affected areas currently.

He said the figure remained below the target of 60 contacts per case, emphasising the need to strengthen contact tracing and community-based surveillance in affected communities nationwide.

READ ALSO: Ebola spread in DRC linked to delayed detection, insecurity — Africa CDC

The Africa CDC official said the response had also expanded laboratory capacity, with 24 laboratories now able to conduct more than 3,400 tests daily across affected areas in the affected region.

He said additional laboratory equipment and more than 100,000 test kits had been provided to strengthen testing in affected and neighbouring areas across the region, supporting response efforts. (NAN)


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Ebola spread in DRC linked to delayed detection, insecurity — Africa CDC

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The Africa Centres for Disease Control and Prevention (Africa CDC) says delayed detection, diagnostic challenges, insecurity and community mistrust contributed to Ebola’s rapid spread in eastern Democratic Republic of the Congo (DRC).

Yap Boum II, head of emergency preparedness and response, Africa CDC, said this on Thursday during a webinar on the ongoing Ebola outbreak in DRC.

Mr Boum said the outbreak involved Bundibugyo virus, a less commonly detected Ebola species, unlike the Zaire strain previously associated with most Ebola outbreaks in the DRC.

He said existing diagnostic test kits in eastern DRC could not initially detect Bundibugyo virus, allowing the disease to spread undetected before laboratory confirmation and response measures.

According to him, the outbreak was detected and officially declared on 15 May, almost five months after the disease had begun spreading in the region.

Mr Boum said delayed detection contributed to the rapid escalation from eight cases in three health zones to more than 2,000 cases across 46 health zones.

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He said the outbreak had subsequently expanded to 63 health zones across seven provinces, making it the largest Ebola outbreak recorded in the DRC.

The official identified insecurity and limited accessibility in eastern DRC as major operational challenges affecting active case searches, contact tracing and access for response teams.

He said community mistrust had further complicated efforts to control transmission, requiring stronger engagement with affected communities and increased community-based response activities.

READ ALSO: Ebola: Nigeria on high alert as cases rise in DRC

Mr Boum said the current outbreak differed from previous Ebola outbreaks in the DRC because of the virus type, insecurity, accessibility challenges and community concerns.

He said the situation demonstrated the need for stronger diagnostic preparedness for less common pathogens, particularly in regions where outbreaks could spread before laboratory confirmation.

The Africa CDC official called for increased resources and political support to enable responders to access affected communities and strengthen disease-control operations safely.

He said the response required not only financial resources but also political support to improve security, community cooperation and access to affected areas.

(NAN)


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