What can i add to my DIY e-liquid to give it some body and full mouth feel?

[trio1989]

i am looking for a tasteless additive to add body to my e-liquid? i have treid EM, Marshmallow, vapewizard and MTS... all at even very low % asin 0.2% still give a weird flavor in the background and mute my flavours?

any ideas anyone?