Is the order of clauses in this example OK?

Does the arrangement of clauses here make the sentence sound too awkward and therefore require reordering? Or is it fine as it is? I'm unclear on whether it's deemed acceptable to put two subordinate clauses next to each other.

"However, once a contaminated food product has been eaten, unless an individual has suffered ill health, there would be little point in seeking legal action against the supermarket where it was bought."