Police are investigating two separate thefts at the same chemist in Greensborough this month, Victoria Police say.
The first theft occurred on 6 August between 4-5pm when a male and female attended the Main Street store and allegedly stole a large amount of vitamins.
The second theft occurred the following day about 5pm, the same two people entered the store and allegedly stole another large quantity of vitamins.
The male is described as aged in his mid-20s with light blonde hair.
The female is described as aged in her late teens with red hair and a solid build.
Investigators have released images of two people they believe may be able to assist with their enquiries.
Anyone with information is urged to contact Crime Stoppers.