Wal-Marts is facing questions about its testosterone test, which can be used to identify those with prostate cancer.
In November, the company announced that it was discontinuing its testosterone testing program and would not offer it to people who had prostate cancer, citing cost.
The move came after two studies by the American Cancer Society and Johns Hopkins University found that men who took the test had an increased risk of dying from prostate cancer over the course of their life.
The company has also said it would start testing for prostate cancer in 2018, but this has been delayed by an FDA review.
Wal-mart is now testing its own men’s testosterone supplement.
The announcement comes just months after the FDA announced a ban on the sale of prostate-specific antigen (PSA) testing, which could be used by men to track their health.
Wal-Mart has also faced criticism for using its testing methods to track its customers, including by using the company’s own tests to track sales.
In a statement to Al Jazeera, Wal-marts chief financial officer John Miller said that the company is “working with leading medical experts and others to understand how we can improve our test’s accuracy and reliability in order to better serve our customers”.
“The results of the FDA’s review are being shared with us and will be updated soon,” he added.
Wal-mart has not commented on the new tests.