Baroness Julia Neuberger, chair of the Lords science and technology sub-committee, said this week that "nudging" people to change their behaviour and adopt a healthier lifestyle is not enough.

As part of our people's panel series, we would like to hear readers' thoughts on big lifestyle changes – and what pushed them in this direction. Did you stop smoking or drinking after being nudged by your doctor, or to set a good example to your children? Did you decide to lose weight after being told to do so by your parents? What was your turning point? Moreover, do you think healthy habits can be encouraged by the government?

If you would like to participate, please email Jessica Reed (jessica.reed@theguardian.com) before 3.30pm on Thursday 21 July, with a contribution of about 200-250 words. Please include your Comment is free username, your real name and a number we can contact you on. We'll pick four entries for publication. The subject line of your email should be "People's panel" and you should include an element of comment – your opinion on the issue being debated. If you object to having your real name used, mention this – but be aware that signed contributions will be more likely to be selected.

Please note that we may not be able to respond to all submissions.