Study: Vitamin C tied to men’s kidney stones



REUTERS

Published — Wednesday 6 February 2013

Last update 8 February 2013 8:33 pm

| نسخة PDF Print News | A A

Men who take vitamin C supplements are at higher-than-average risk of developing kidney stones, according to a Swedish study of more than 22,000 men.
“It has long been suspected that high doses of vitamin C may increase the risk of kidney stones as some of the vitamin C absorbed by the body is excreted in urine as oxalate, one of the key components of kidney stones,” said lead researcher Laura Thomas at the Karolinska Institutet in Stockholm.
Thomas and her team, whose findings appeared in JAMA Internal medicine, used data from a large study of middle-aged and elderly Swedish men who answered a series of questions on their diet and lifestyle, then were tracked for an average of 11 years.
The current analysis included 907 men who said they took regular vitamin C tablets and more than 22,000 who didn’t use any nutritional supplements.
Of the vitamin C users, 3.4 percent developed kidney stones for the first time during the study, compared to 1.8 percent of non-supplement users. Men who took vitamin C supplements at least once a day had the highest risk of kidney stones.
Stones are made up of tiny crystals, which can be formed by calcium combining with oxalate. They usually pass on their own, but can cause severe pain in the process, though larger stones occasionally require surgery.
The findings don’t prove that the vitamin itself triggers stones to form. But researchers said that because there are no clear benefits tied to taking high-dose vitamin C, people who have had stones in the past might want to think before taking extra supplements.
Men are more likely to develop stones than women.
The findings don’t mean people shouldn’t get plenty of vitamin C through fruits and vegetables, since the antioxidant is important for bone and muscle health — and severe deficiency can cause scurvy.
“Vitamin C is an important part of a healthy diet,” Thomas said. “Any effect of vitamin C on kidney stone risk is likely to depend both on the dose and on the combination of nutrients with which it is ingested.
Swedish supplements, like those the study participants would have taken, typically contain about 1,000 milligrams (mg) of vitamin C per tablet. Most vitamin C supplements sold in the US contain either 500 or 1,000 mg.
Brian Matlaga, a urologist who studies kidney stones at Johns Hopkins Medicine in Baltimore, said that more research is needed to determine for certain whether reasonable doses of vitamin C may increase the kidney stone risk.
For now, people who haven’t had kidney stones before shouldn’t worry about related risks tied to the vitamin.

 

What's happening around Saudi Arabia

ABHA: Gov. Faisal bin Khalid bin Abdulaziz, Asir region, ordered the formation of a working team in Bisha to address the status of the battered woman who recently shared her suffering on social networking sites.Mohammed bin Sabrah will head the team,...
MADINAH: Madinah Gov. Prince Faisal bin Salman launched a series of charity and developmental projects during his recent visit to Khaibar Province at costs exceeding SR100 million.They included municipal projects at Khaibar, Al-Salsah and Al-Ashash M...
MADINAH: Pilgrims spend the most beautiful moments in the Prophet’s Mosque, where they pray in Riyazul Jannah (garden from the gardens of paradise) and get to greet the Prophet, peace be upon him, said the Omani pilgrim, Ahmed Nasser. “Such deeds giv...
MADINAH: A member of the Senior Scholars Council, Dr. Abdullah Al-Manieh, has called for the establishment of women’s departments at the Islamic University in Madinah in line with other universities in the Kingdom.“The Muslim woman has had her own st...
JEDDAH: The euphoria over the sudden resumption of call facility on WhatsApp in the Kingdom on Saturday was short-lived as the service was not widely available the following day. A large number of users of the popular messaging service, barring a few...
JEDDAH: Work on developing and modernizing the Kingdom’s 27 airports is ongoing and is expected to be completed within the next five years, according to Sulaiman Al-Hamdan, president of the General Authority for Civil Aviation (GACA).“Our goal is tha...
RIYADH: Saudi Arabia and South Korea are set to widen cooperation in the health care sector following a joint road show which underlined potential areas of cooperation and showcased world-class health facilities of that country. The event, titled “Ko...
RIYADH: The Saudi Green Building Forum (SBGF) believe that about fifty percent of the ongoing eco-friendly green building projects across the Kingdom are facing delays for not fulfilling criteria.Faisal Alfadl, secretary-general of the forum, on Satu...
AL-UQAIR: The low-quality of education in the Kingdom arises from many factors. Included among these are the complexity of the system itself, unclear educational vision, non-professional education development programs, and instability due to changing...
JEDDAH: Security authorities in Jeddah called a citizen and his wife for interrogating with them on the charges of beating their Eritrean housemaid.Makkah Police media spokesman, Col. Dr. Atti bin Attiah Al-Quraishi, said: “The Safety Center of Jedda...
AL-UQAIR: The Saudi Commission for Tourism and National Heritage (SCTNH) has deposited SR600 million with local banks for the Al-Uqair Development Company in Al-Ahsa, SCTNH President Prince Sultan bin Salman has said.“Saudi citizens have some equitie...
JEDDAH: A number of preachers have been arrested for using sermons to promote political ideologies, said Fahad Sulaiman Al-Khalifa of the Ministry of Islamic Affairs.He said the issue was not widespread, and the ministry reiterated that the sermon sh...
JEDDAH: A Saudi military analyst and retired brigadier, Ibrahim Al-Marie, has called for the compulsory drafting of young Saudis into the military.This is, he said, not only because the Kingdom is facing regional threats, but because of its benefits...
RIYADH: Advertisement campaigns for fake TOFEL and ILET certificates are being monitored on social media websites in an effort to halt this illegal practice. The certificates originate from Jordan and can be obtained by clients for a sum of SR2,000,...
JEDDAH: A group of young men has come up with a novel home cinema project.The project involves providing a cinema hall show for lovers of the entertainment medium by providing projector screens, sound systems and lighting devices with suitable and co...

Stay Connected

Facebook