Nanoparticles in food, vitamins unhealthy for humans
London: Billions of engineered nanoparticles in foods and pharmaceuticals, which are ingested by humans daily, could be more detrimental to health than previously thought, a new study has warned.
A research collaboration led by Michael Shuler, a professor of Chemical Engineering and chair of Biomedical Engineering at Cornell University, studied how large doses of polystyrene nanoparticles – a common, FDA-approved substance found in substances ranging from food additives to vitamins – affected how well chickens absorbed iron, an essential nutrient, into their cells.
According to the study, high-intensity, short-term exposure to the particles initially blocked iron absorption, whereas longer-term exposure caused intestinal cell structures to change, allowing for a compensating uptick in iron absorption.
The researchers tested both acute and chronic nanoparticle exposure using human gut cells in petri dishes as well as live chickens and reported matching results.
They chose chickens because these animals absorb iron into their bodies similarly to humans, and they are similarly sensitive to micronutrient deficiencies.
Shuler said the research serves to underscore how such particles, which have been widely studied and considered safe, cause barely detectable changes that could lead to, for example, over-absorption of other, harmful compounds.
Human exposure to nanoparticles is only increasing, Shuler said.
“Nanoparticles are entering our environment in many different ways,” Shuler said.
“We have some assurance that at a gross level they are not harmful, but there may be more subtle effects that we need to worry about,” Shuler added.
The study has been published in the journal Nature Nanotechnology.
More from India
More from World
More from Sports
More from Entertaiment
- Bihar polls: Lalu's younger son claims to be older than elder brother
- Rahul Gandhi received pay while on 56 day leave: Organizer
- Mega sale: Snapdeal, Flipkart, others gear up for festive season
- Dadri lynching: Azam Khan seeks UN intervention
- Zee Media Exclusive: Three Romanians arrested in skimming scam in Mumbai
- Salman Khan, Aamir Khan's friendship turns sour? Here's the truth
- India vs South Africa: How cricket fraternity reacted to crowd's disgraceful behaviour at Cuttack
- Dadri lynching: Any threat to secular fabric of country will not be tolerated, says Rajnath Singh
- 'Rahul Gandhi gets pay without work'
- Dadri Police recommends FIR against Mahesh Sharma, Sangeet Som, Naseemuddin Siddiqui