Just a note from a Lemon Lover: The store brand, "ReaLemon®," sold in bottles and also plastic lemons, is more oily than generic lemon juice. My opinion is it has more peel and "zest" and oil. I prefer cheap-o no-name for e-juice, seems stronger without imparting so much "artificial" lemon taste. Because the ReaLemon brand tastes far from a fresh lemon. Don't know what they do to ReaLemon® or how they make it, but as a life-long lemon lover, I think it simply sucks on all levels in food or drink.
But in e-juice, I'm using generic lemon juice only for sour-tart-inizing (lol) fruit juices and pH balance. So it may not matter after all, using ReaLemon or generic. Malic is great for fruits but that super artificial sour is wearing on me and I'm finding cheap lemon juice and vinegar, a drop of each in 3 to 5 mls of juice, depending on juice, is bringing out sour subtlties without chemical overload.
Wish I could turn a fresh crisp Granny Smith into a few drops of sour flavor. Anyone know how to do that?
ReaLemon® ingredients:
http://www.simplydixon.com/2011/03/10/realemon-juice-real-or-fake/
And thanks for everyone's excellent hard work here.
Edit: Just remembered: LEMON JUICE AND THROAT HIT: A long time ago, I realized that a cup of hot tea with a good amount, a teaspoon or two, of lemon juice, improved the experience of analog smoking. At first I thought it was the tea, but came to realize that it was the steam and lemon juice, I think it had an effect on cleaning out my lungs, or making them more susceptible to throat-hit. So, lemon juice in e-juice might increase throat hit in the same way, as any acid, it might scrape around there in the lungs and perhaps increase absorption of other stuff. Even now, with e-smoking, a cup of hot tea with lemon (sip and slurp it in and get the vapor in your lungs) adds to the enjoyment of vaping. (If heavy throat hit is your thing, as it is mine. Love that raunchy, pins-&-needles throat-hit, like a very-well-done steak or burger, love the taste of carbon, a devil's pleasure to be sure, but so much more enjoyable now that I quit analogs, as far as smoking goes.)
Okay, so I think the cheap generic lemon juice may be more citric acid and probably cheap concentrate, whereas I guess ReaLemon® uses the formula: "Let's buy the cheapest lemon juice concentrate we can on the open market, mix it with industrial lemon oil and other preservatives and bleaching agents to keep the color 'lemony fresh' and ... Who cares?...."
"It's all BS and it's bad for ya, folks." -- the late great George Carlin.
My problem, like most, is I am simply a glutton and a lush. I expect each batch to be better than the last, I expect each hit to give me the best blast of flavor comparable to the best orgasm I ever had, who doesn't and who wouldn't? But chemistry and taste don't work that way, there are thresholds and depletion and chemical entropy and just keep vaping gallons and gallons and you'll drown in a smorgasbord of tasteless mediocrity. Or just keep .........ing -- the fun kinda wears off after a few times if you do it consecutively and often. Gotta take a break once in a while, rejuvenate the buds, shed some tolerance. Exercise. Metabolism works wonders for re-enjoyment of just about everything.