Trust in sunscreen could be slipping after dozens of products from major brands were pulled from shelves due to sun protection fears. "It erodes trust in all sunscreen now and that's going to be front of mind for everybody when they go and buy sunscreen," Dr Harrison told AAP. Wild Child Laboratories told AAP there were "no manufacturing issues identified at (its) facility that could explain variability in SPF testing results". "There has been a breach of faith in the system because much of our trust is automatic," he said. "This is reinforcing the negative valence which no brand wants ... and what's happened is sunscreen has suffered, so people feel like they can't trust the SPF sunscreen elements."