Please have a look at this useful RG link.

Article Drinking Water Nitrate and Human Health: An Updated Review

Please have a look at this useful RG link.

Article Drinking Water Nitrate and Human Health: An Updated Review

Consuming too much nitrate can affect how blood carries oxygen and can cause methemoglobinemia (also known as blue baby syndrome)

The conversion of nitrate into nitrite in the organism could be at the origin of certain forms of cancer.

It is widely known that babies fed with infant formula mixed with water containing high levels of nitrates can create serious health problems.

Dear Jean-Pierre Jost

Many thanks for your explanation

Hello Joan Nyika

Many thanks for your explanation

Good luck with your research work

The harmful effects of nitrate on public health include:

1. Methemoglobinemia. Nitrate causes methemoglobinemia in infants.

2. Cancer. Nitrate is converted to nitrite after ingestion, and this nitrite reacts with both natural and synthetic organic compounds to produce N-Nitroso compounds in the human stomach.

3. Disruption of thyroid function. High nitrate content results to increase in hypertrophy, a condition marked by enlargement of the thyroid, the gland responsible for many of the body's endocrine and hormonal functions (Van Maanen, et al. 1994).

4. Birth Defects. Previous Scientific studies point to a possible link between exposure to nitrite, nitrate and N-Nitroso compounds and birth defects. Y

Further reading:

https://www.ewg.org/research/pouring-it/health-effects-nitrate-exposure.

Hello Dr Collins Tay

Thank you SO much for your reply and also the paper

I wish you good success for your research work

It is very well known that concentrations higher than 10 mg of nitrate/litre drinking water may induce methemoglobinaemia, especially in infants who are particular sensitive as they may receive a very dosage as compared with their body weight. An increased risk of favouring cancer is still controversial. The most important source of nitrates in the human diet (European) are vegetables (about 80%), particularly leafy greens like lettuce and spinach, and processed meat products (about 5%).