Jessica Simpson ain't too rattled by the buzz over her snake-sperm-quaffing confession -- insisting she’ll keep using it to prime those vocal cords from here on out.

The singer was spotted strutting into LAX Sunday, proudly declaring that chugging down on the specialty Chinese herb cocktail was a fang-tastic approach to clear her throat and make her a better vocalissst.

JS is clearly the ultimate snake semen spokesperson -- so much so, we asked if she's down to strike while the iron's hot and officially endorse it ... so catch the clip to hear exactly what she hisses next.

We also squeezed in a quick chat about her new music as she slithered to airport security -- but you’ll have to catch the video to see if she’s boarding with her trusty snake juice!

Remember, Jessica initially described the taste of the sperm as honey -- and no doubt, her career comeback has been just as sweet, releasing her first record in 15 years, an EP titled "Nashville Canyon, Part 1."