I don't know of any peer-reviewed literature backing this up, but I haven't looked very hard. Can anybody look for (drinking chilled lemon water) and (boost metabolism)? https://twitter.com/M4verick80/status/1008487219475054592 …
I looked into lemon water for a blog, and essentially the claims made are based on misunderstandings of biological systems and/or are not backed by any evidence at allhttps://medium.com/@gidmk/lemon-water-is-a-total-waste-of-time-c3bdfbada3f0 …