
A group of identical twins took part in an experiment to see if facial fillers actually made them look look younger.
In each pair, one twin received Restylane filler injections, provided by Swiss pharmaceutical company Galderma, while the other had no treatment whatsoever.
Restylane is a hyaluronic acid-based gel designed to smooth wrinkles and improve skin firmness.
Surprisingly, the results were more subtle than you think after the twins - aged between 33 and 63 - didn't look too different.
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Journalists invited to inspect the twins closely reported that the treated siblings appeared healthier and slightly younger, while still looking entirely natural.
As reported by the Daily Mail in 2015, many of the untreated twins were so impressed that they planned to undergo the same procedures themselves.

Among the participants were former beauty queens Gay and Zoe Spink, 63, musician James Martin, 37, and sisters Diana and Sandra Horner, 46.
"My skin feels great and people keep telling me how well I look," Sandra said, while James compared the procedure to having a haircut.

Zoe, meanwhile, said: "Doing this has been such a positive thing for us.
"Seeing Gay look so happy and healthy is a wonderful feeling because we lost our mum recently. If she could see us today, I know she'd be so proud."
Casino actor Sharon Stone, previously named as a global ambassador for Galderma's 'Proof in Real Life' campaign for Restylane fillers in 2015, said she started having treatment after a stroke in 2001.
"Restylane helped rebuild the damage done in my face," Stone, who was at the campaign launch in Berlin, added.

"It helped me heal physically, but also psychologically as it felt like I looked like myself again.
"I have since had treatment in my hands, as they say you can always tell a woman's age by her hands."
Roughly one in five people aged 18 to 25 have had dermal fillers or Botox in the UK, according to Save Face.
Polls showed 59 percent of young people view fillers as comparable to getting a haircut or manicure.
“Although it is extremely alarming that 59 percent of respondents perceive dermal fillers as comparable to getting a haircut or a manicure, it is not at all surprising,” says Ashton Collins, the co-director of Save Face.
“The figures are reflected in the number of complaints we receive, almost 50 percent of which are from 18 to 24-year olds."