In the 16-part series, participants confront issues including grief, trust, sibling rivalry and abandonment.
Grylls, 51, said the show created a framework which allowed people to confront their problems head on, because “there’s nowhere to hide” in the wilderness.
“You can’t storm off. You can’t just pick up your phone. You can’t just get in the car.
“The wild doesn’t judge, but you can’t hide.
“In relational issues, we like to hide behind things,” he said. “We blame this, we blame that – in the wild, we don’t.”
He cautioned the show would not be able to resolve complex issues, such as childhood trauma, in a matter of days.
However, it will allow people to “light a fire” and start the healing process.
“Sometimes the hardest bit is actually just sitting down together – not fighting and just listening – and saying, ‘I want to redefine this in our relationship’,” he added.