Since 1 July 2026 the EU-wide low-value VAT exemption under 150 has ended, in line with the EU fiscal reform
Specifically, the biosynthesis of amino acids (37 KOs), was significantly down-represented, including cysteine and methionine metabolism ( metA , metB , metK , mtnN , thrB , cysK , patB and L-serine dehydratase ), the biosynthesis of lysine ( dapA , dapB , dapE , dapH , dapL , argD , patA and lysA ), the metabolism of histidine ( hisA , hisB , hisE , hisH and hisI ), glycine, serine and threonine ( glyA , thrB , thrC and L-serine dehydratase ), alanine, aspartate and glutamate (asnA, asnB and argH), the biosynthesis of phenylalanine, tyrosine and tryptophan ( aroD and aroE ) and the biosynthesis of arginine ( argD and argH )
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They can slightly improve bioavailability, but they don't come close to matching the efficiency of an injection