I know it sounds mad but I just want a well tested drink that contains zero stimulants and plenty of good stuff like 6g Taurine, l-cystine, some good magnesium

I know it sounds mad but I just want a well tested drink that contains zero stimulants and plenty of good stuff like 6g Taurine, l-cystine, some good magnesium etc. if I knew the testing/provenance of this stuff I’d probably pay $5 per can.