The stock reacted, plunging 5.42 per cent to Rs 6,461.15 on BSE.
On NSE, it slumped 5.67 per cent to Rs 6,450.
The stock had rallied 8 per cent yesterday following reports that the FSSAI-approved laboratory of Central Food Technological Research Institute (CFTRI) found Maggi noodles in compliance with the country's food safety standards.
Meanwhile, the Food Safety and Standards Authority of India yesterday rejected findings of the Food & Drugs Laboratory of Goa as well as CFTRI, Mysore, over test discrepancies.
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Rubbishing tests done by the Goa lab, the food regulator said food analysts at the lab had "wrongly taken the permissible limit of lead as 10 parts per million as against the actual maximum permissible level of 2.5 ppm".
On the report of CFTRI on the same sample, FSSAI said the Mysore lab had not tested the noodles for the banned MSG.
"It is clarified in the first instance that FSSAI has not given any clean chit regarding the safety of Maggi Noodles," it said in the statement that followed reports that the Goa and Mysore labs have found Maggi samples safe.