Starting the day with lemon juice in warm water

[~me~]

I have and Aunty who swears by starting the day with lemon juice and water and ending the day with a pear and cup of boiling (cooled down to drinkable) water. She is very healthy

[AnyDream]

So google recommends lots of different things - greatest consensus is around 1 tablespoon/half a lemon's worth of juice in approx 250 ml of water with/without sweetening aid.