Twinlab DMAE H3, Unflavored, 1.67 Ounces (Pack of 4)

What the brand says

DMAE-H3 is a concentrated solution of the PABA (para aminobenzoic acid) salt of DMAE stabilized with benzoic acid. DMAE (Di-methyl amino ethanol) by itself is alkaline and caustic. Therefore, only salts and esters of DMAE are used. DMAE naturally occurs as liquid in its concentrated form.