What is in "Real Water"?

This is a weird story: 

LAS VEGAS (AP) — Federal and local health officials are warning people not to drink a Las Vegas-based bottled water brand, Real Water, after linking it to liver illness in five hospitalized children.

Company President Brent Jones on Wednesday called for stores to stop selling the product “throughout the United States until the issue is resolved.” “Our goal is to diligently work with the FDA to achieve a swift resolution,” a statement from Jones said.

The U.S. Food and Drug Administration warned consumers, restaurants and retailers not to drink, cook with, sell or serve the product, the Southern Nevada Health District said in a statement posted Tuesday.

...The health district, based in Las Vegas, said it began investigating five cases of acute non-viral hepatitis in November 2020 and notified the FDA. It said it also investigated the illness of six other people — three children and three adults — who reported less severe symptoms including vomiting, nausea, appetite loss and fatigue.

Five children required hospitalization but recovered, the health district said. The patients lived in four different households.

“To date, the consumption of ‘Real Water’ brand alkaline water was found to be the only common link identified between all the cases,” the district said.

Acute non-viral hepatitis is a liver inflammation that can be caused by exposure to toxins, autoimmune disease or drinking too much alcohol, the district said. Symptoms can include fever, fatigue, loss of appetite, nausea, vomiting, abdominal pain, dark urine, light-colored stools, joint pain and yellow skin or eyes...

So this stuff is pH 8-9. What could you possibly add to water to make it more basic but would also cause liver failure? That's pretty odd, no? The cheapest thing I can think of is baking soda? How is that palatable?