People across all age groups in India, both men and women, are consuming inadequate amounts of micronutrients critical for health, including iron, calcium and folate, as estimated in a study published in The Lancet Global Health journal.

The study is the first to provide estimates of insufficient consumption of 15 micronutrients across 185 countries, taken through diets without the use of supplements, according to an international team, including researchers from Harvard University, US.

The findings suggested that around the world, almost 70 per cent, or over five billion, people do not consume enough iodine, vitamin E, and calcium.

The researchers also found that within a country and an age group, more women were consuming inadequate amounts of iodine, vitamin B12 and iron, compared to men, whereas more men were consuming inadequate amounts of magnesium, vitamin B6, zinc and vitamin C, compared to women.

In India, while more women consumed insufficient amounts of iodine, compared to men, more men consumed inadequate amounts of zinc and magnesium, compared to women, the team found.

While analyses over the past 10 years have looked at micronutrient deficiencies, the researchers said large data gaps remain for many micronutrients and population groups.

In this study, the authors used publicly available data from the Global Dietary Database to estimate the prevalence of insufficient nutrient intakes for 99.3 per cent of the global population.

Men and women aged 10-30 years were most prone to low-levels of calcium intake, especially in South Asia, Southeast Asia and sub-Saharan Africa, the team said.

The authors said that the findings could be used by public health professionals to target populations in need of dietary interventions.

They added that since they did not account for intake of fortified foods or supplements, the results could possibly be an overestimate for some key nutrients in particular locations where people consume high amounts of fortified foods and supplements.

Except for the headline, this story has not been edited by The Telegraph Online staff and has been published from a syndicated feed.