| id | Phytocompound | Taste |
| anabsin | bitter | |
| anabsinthin | bitter | |
| andrographolide | bitter | |
| angelic acid | pungent (biting); sour (acid) | |
| angelicin | bitter | |
| angustifoline | bitter | |
| anhydroverlotorin | pungent (insufficient evidence) | |
| anisodamine | bitter | |
| anisotropine methylbromide | bitter | |
| anthranilic acid | sweet; sour (insufficient evidence) | |
| apigenin | bitter | |
| apigenin 8-C-(alpha-L-rhamnopyranosyl-1→2-O-beta-D-glucopyranoside) | astringent | |
| apioglycyrrhizin | sweet | |
| apomorphine | bitter (insufficient evidence) | |
| apterin | bitter | |
| arabinobiose | sweet | |
| arabinogalactan | sweet (insufficient evidence); sweet modifying compound: enhancer of sweetness potencies of saccharin, cyclamate, thaumatin and monellin | |
| araboglycyrrhizin | sweet | |
| arachidonic acid | bitter | |
| arborescin | bitter |
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