Using lemon juice for ginger beer?

[userzzz]

Was thinking of trying a GB, just Ginger + Lemon juice, i had the bright idea to use juice as thought it would be simpler than squeezing lemons, the bottle of juice says it does have preservatives though(potassium metabisulphite), i take it this will be no use then?

[Klaus]

This metabi.... will kill the yeast ust like our CTs d.
Needs to be boiled just the same as for Ribena and similar.

[userzzz]

So your saying that if i boil the lemon jiuce it will remove the preservatives ? I was planning on boiling everything first anyway.