Social media adverts must clearly state the use of manipulated images because of the risk to people's mental health, campaigners have said.
Postgraduate student Lara Philippart, from Swansea, said she began a petition after social media caused her anxiety about her body.
The 24-year-old began researching the topic as part of a master's degree.
"I realised the extent of which people are affected by social media," she said.
She feared people were "under-eating" in a bid to look like unachievable images, created with filters, and it struck her something "needs to be done".
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"It's so detrimental to mental health because you're looking at something that isn't real, but your brain sees it as real," she said.
It was announced in Norway last month a law would come into force to stop influencers posting modified photos without declaring what they have done.
A study by London's City University found 90% of women surveyed would edit pictures to reshape their nose or jaw, brighten their teeth or alter their waist before posting on social media.
Psychologist Dr Nia Williams said seeing edited images on social media could have a negative impact on mental health.
"These images are around us day and night now, and can cause us to compare ourselves to other people," she said.
"If we see...
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