Dilute some Malic Acid Powder in your favourite DIY e-liquid recipe to give your vape a pleasing sour sensation. Sour is best when used in combination with fruit, citrus, and gummy flavours.
Note: The Flavor Apprentice’s ‘Sour’ is a Malic Acid Powder at a 20% dilution in PG. To make the same 20% dilution, mix 6g of Malic Acid Powder into a 30ml solution of PG or VG.
Keep in mind that everyone has different tastes and that the above-recommended percentage is subjective. Lung Buddy always suggests starting low and working your way up from there until you find that sweet spot that suits you best.