The struggling genetic testing business 23andMe says it will cut 40% of its workforce, or 200 jobs, as it fights for survival.

The once-popular DNA-testing site will also halt work on therapies it was developing.

Last year, the business said hackers had managed to boost access to personal information of millions of its users.

23andMe’s distribute worth has fallen by more than 70% this year, as its co-founder and chief executive Anne Wojcicki tries to turn the business around.

The business said it expected to incur one-off costs of $12m (£9.3m), including severance pay, for the schedule that will outcome in reserves of $35m.

“We are taking these challenging but essential actions as we restructure 23andMe and focus on the long-term achievement of our core buyer business and research partnerships,” Ms Wojcicki said.

The business also said it is considering what to do with the therapies it had in advancement, including licensing or selling them.

23andMe is a giant of the growing ancestor-tracing industry. It offers genetic testing from DNA, with ancestry breakdown and personalised health insights.

Its customers include famous names, from rapper Snoop Dogg to multi-billionaire investor Warren Buffett.

In December last year, 23andMe confirmed that hackers had accessed details of about 6.9 million of its users.

In some cases this included household trees, birth years and geographic locations. But the stolen data did not include DNA records, it said.

The hackers logged into 23andMe accounts by using email and password details previously exposed by other breaches.

They downloaded not only the data from those accounts but the private information of all other users they had links to across the household trees on the website.

In June, data watchdogs in the UK and Canada announced investigations into the breach.

At the period, a statement from the UK’s Information Commissioner’s Office said “23andMe is a custodian of highly sensitive personal information, including genetic information which does not transformation over period.”

“This makes community depend in these services essential,” it added.

In another blow to the business, seven of 23andMe’s eight-powerful board resigned in September.

The firm’s independent directors said they had stepped down after not receiving a satisfactory purchase propose from Ms Wojcicki.