Her comments follow a new ComRes survey that found more than half of 18 to 34-year-olds feel that reality TV and social media have a negative effect on how they see their bodies.
Jessie Smart, from the Christian Ministry Belle told Premier shows like Love Island can make young people have unrealistic ideas of the way their bodies are supposed to be.
Speaking during Premier News Hour, she said: "We all know they're all a similar kind of look of people. They fulfil what society considers as attractive.
"And actually what we need to do is start to widen that and show people who are representative of real life."
She said while she missed the final, both her and her husband had watched previous episodes.
Explaining why, she said: "I'm a youth pastor, he's a kid's pastor and obviously I do a lot of work with girls on body image... just knowing the sort of influence that it has on the way we view our bodies, I wanted to be a part of that conversation.
"And I actually wanted to be able to chat with the young people in my youth group about what they thought about it and whether they were watching it and be able to have all of these conversations and be able to give a different voice among them."
An average of 3.6 million people tuned in on Monday night to watch the winners crowned - breaking audience records for ITV2.
The head of NHS England raised concerns about seeing trailers for cosmetic breast surgery during the popular reality show.
Defending adverts shown during Love Island, Carolyn McCall, chief executive of ITV told BBC One Breakfast that a "tiny number" of adverts were "not quite right".
"We take that very, very, seriously and actually there were a tiny number of ads that I would have thought the juxtaposition was not quite right," Ms McCall added.
The ComRes survey of 2,000 British adults for BBC 5 Live also found that younger people were more likely to consider having cosmetic surgery with 25 per cent of respondents attributing that to reality shows.
This figure rose to 55 per cent in the 18 to 34-year-old age group.
They coupled up on day one, and smashed down every hurdle that got in their way. Dani and Jack are your very worthy winners of #LoveIsland 2018! pic.twitter.com/Fc5iPp7O2l
— Love Island (@LoveIsland) July 30, 2018
Smart said it's important to reassure young people so they don't become negatively effected by reality shows.
"It's really hard when we start to want to alter our image and our body in all of these ways that ultimately aren't going to bring us the happiness that we think they will," she said.
"So I just think it's so important to talk to young people about this kind of thing."
Love Island producers have already started the process to find the next batch of contestants for the TV show.
ITV2 is "looking for vibrant singles from across the UK who want to head to the sun, in search of a summer of love" in 2019.
In a message posted on the ITV website, show bosses said they want to hear from would-be contestants "straight away".
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