To be fair....lemon water when you have a cold is about as good as any other remedy modern medicine has figured out for the modern cold.
Most modern cold treatments really are ineffective vitamin pills with large marketing budgets behind them...
"OMG, I took this for 3 days and my cold went away!"
At least this stuff can help me feel a little better while I have the cold and help me sleep at night.
Lemon water will do non of that.