London, May 1: Eating lots of refined carbohydrates, particularly white pasta and rice, may advance the start of menopause by about one-and-a-half years, warns a study.

The findings, published in the Journal of Epidemiology and Community Health, showed that high intake of healthy foods, such as oily fish and fresh legumes, such as peas and green beans, was associated with a later onset of menopause.

"There are a number of causes that have been considered for the relationship between age and start of menopause, such as genetic factors or behavioural and environmental exposures. But there are fewer studies that look at the impact of diet," said study lead author Yashvee Dunneram, a postdoctoral researcher at the University of Leeds in Britain. 

The study used data from more than 14,150 women living in Britain. Along with a detailed diet questionnaire, an initial survey collected information on reproductive history and health.

When a follow up survey and questionnaire were conducted four years later, the researchers were able to assess the diets of the women who had experienced the onset of a natural menopause in the interim.

The average age at the start of the menopause for women in Britain is 51 years. 

More than 900 women between the ages of 40 and 65 had experienced a natural start of their menopause at the time of the follow-up survey, meaning they had not had menstrual periods for at least 12 consecutive months and menopause had not been brought on by such things as cancer, surgery or pharmaceutical treatments.

Analysis of their diet showed that high intakes of oily fish were associated with a delayed start of menopause by nearly three years. 

A diet with lots of refined pasta and rice showed that menopause was more likely to occur one-and-a-half years earlier than average.

"The age at which menopause begins can have serious health implications for some women," study co-author Janet Cade, Professor at the University of Leeds, said.

Previous studies have suggested that earlier onset of menopause is associated with lower bone density, osteoporosis and increased risk of cardiovascular diseases, while later menopause has been associated with a higher risk for breast, ovarian and endometrial cancers.

Even though the new study is observational and cannot prove any cause, the researchers offer some possible explanations behind their findings, according to a BBC report on Tuesday.

For example, legumes contain antioxidants, which may preserve menstruation for longer.

Similarly, omega-3 fatty acids found in oily fish, also stimulate antioxidant capacity in the body.

On the other hand, refined carbs increase the risk of insulin resistance, which can interfere with sex hormone activity and raise oestrogen levels. 

This might increase the number of menstrual cycles leading to the egg supply running out faster, the BBC report said.

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Imphal, Nov 21: The National People's Party (NPP), which recently withdrew support from Manipur’s BJP-led government alleging that the administration failed to resolve the crisis and restore normalcy, on Thursday said the party may reconsider the decision if the saffron party replaces Chief Minister N Biren Singh.

NPP national vice-president Yumnam Joykumar Singh also said that three of the party’s seven MLAs attended a meeting convened by the CM, but they should not have done so since support was withdrawn from the government.

The withdrawal of support on Sunday, however, did not have any impact on the BJP-led government, as the saffron party enjoys absolute majority with its 32 MLAs in the 60-member House. The Naga People’s Front and the JD(U) are also in the ruling coalition.

"CM Biren Singh has totally failed to bring normalcy to Manipur. That is the main reason for our national president (Meghalaya CM Conrad Sangma) to withdraw support for it. In case Biren is replaced, there is a possibility that a new government might take the steps required to restore normalcy. The NPP may reconsider its position at that time," Joykumar Singh told PTI.

He claimed that three NPP MLAs might have joined the November 18 meeting chaired by the CM because of “confusion”.

“The meeting was for NDA legislators. We have withdrawn support to the Biren Singh-led government but we are still NDA partners. However, we have cautioned our MLAs that attending such meetings without prior approval from the state or national president may lead to disciplinary actions," the NPP vice-president said.

Asked about media reports on notices sent to the NDA MLAs who were absent at the November 18 meeting, he said he did not think anything like that was sent to NPP legislators.

“Three NPP MLAs were present at the meeting while four were not. We are not aware of any notifications sent by Biren Singh. He might have sent notices to the BJP MLAs but that is their internal matter. He has no mandate to send notices to NPP MLAs," Joykumar Singh said.

On the Centre's decision to deploy an additional 50 companies of Central Armed Police Force (CAPF) in the state because of escalated violence, he said, "My assessment is no further deployment of security forces is required. The state is already over-saturated with security forces and it is a question of how to utilise them effectively."

Joykumar Singh, a former director general of police in Manipur, said that it appears from the current state of affairs that the additional companies of CAPF have been sent to protect the residences of MLAs and ministers.

Protestors recently attacked the residences of several ministers and legislators in Manipur.

Manipur has seen a fresh wave of protests after six people – three Meitei women and three children - went missing from a camp for displaced persons in Jiribam last week, following a gunfight between armed men and security forces that resulted in the deaths of 10 Kuki youths.

More than 220 people have been killed and thousands rendered homeless in ethnic violence between Imphal Valley-based Meiteis and adjoining hills-based Kuki-Zo groups since May last year.