Described is the use of a mixture of peptides, the peptides comprising at least 6.5% wt cysteine, for the manufacture of a medicament, supplement, beverage or food product for restoring thiol homeostasis. Furthermore, a method is described for restoring thiol homeostasis in a subject in need thereof, said method comprising administering to said subject an effective amount of a mixture of peptides, the peptides comprising at least 6.5% wt cysteine.