Malic Acid is not a sweetener. It is to tart what Citric Acid is to to sour. TPA Sweet & Sour is a combination of the two. Dissolving in PG or PGA would certainly create an additive you could certainly use in DIY but you'll have to check for the ratio as I disremember and cannot brain that at this moment.
|More than likely, someone smarter than I will chime in with the proper mix.