| Linden (Tilia cordata) | 04251557107933 | Astra Biotech GmbH | Unknown class | |
| Lobster | 04251557103522 | Astra Biotech GmbH | Unknown class | |
| London plane, Maple leaf sycamore (Platanus acerifolia) | 04251557107490 | Astra Biotech GmbH | Unknown class | |
| Lovage | 04251557104994 | Astra Biotech GmbH | Unknown class | |
| Lychee | 04251557105694 | Astra Biotech GmbH | Unknown class | |
| Lysozyme | 04251557106592 | Astra Biotech GmbH | Unknown class | |
| Maasdam cheese | 04251557103997 | Astra Biotech GmbH | Unknown class | |
| Macadamia nut | 04251557105670 | Astra Biotech GmbH | Unknown class | |
| Mackerel | 04251557104345 | Astra Biotech GmbH | Unknown class | |
| Madonna lily (Lilium candidum) | 04251557108343 | Astra Biotech GmbH | Unknown class | |
| Maize | 04251557103041 | Astra Biotech GmbH | Unknown class | |
| Maize (Zea mays) | 04251557106042 | Astra Biotech GmbH | Unknown class | |
| Malassezia spp. | 04251557107070 | Astra Biotech GmbH | Unknown class | |
| Maleic anhydride | 04251557106554 | Astra Biotech GmbH | Unknown class | |
| Malt | 04251557103621 | Astra Biotech GmbH | Unknown class | |
| Mandarin | 04251557105267 | Astra Biotech GmbH | Unknown class | |
| Mango | 04251557103638 | Astra Biotech GmbH | Unknown class | |
| Mango (Mangifera indica) | 04251557107728 | Astra Biotech GmbH | Unknown class | |
| Mare milk | 04251557108701 | Astra Biotech GmbH | Unknown class | |
| Marjoram | 04251557104987 | Astra Biotech GmbH | Unknown class | |
| Mate | 04251557105588 | Astra Biotech GmbH | Unknown class | |
| Meadow fescue (Festuca elatior) | 04251557105854 | Astra Biotech GmbH | Unknown class | |
| Meadow foxtail (Alopecurus pratensis) | 04251557105977 | Astra Biotech GmbH | Unknown class | |
| Melon | 04251557103591 | Astra Biotech GmbH | Unknown class | |
| Mepivacaine | 04251557102020 | Astra Biotech GmbH | Unknown class | |
| Mesquite (Prosopis juliflora) | 04251557107582 | Astra Biotech GmbH | Unknown class | |
| Metamizole | 04251557102044 | Astra Biotech GmbH | Unknown class | |
| Metronidazole | 04251557102303 | Astra Biotech GmbH | Unknown class | |
| Microsporum canis | 04251557106998 | Astra Biotech GmbH | Unknown class | |
| Milk | 04251557102983 | Astra Biotech GmbH | Unknown class | |
| Milk powder | 04251557104086 | Astra Biotech GmbH | Unknown class | |
| Mint | 04251557103911 | Astra Biotech GmbH | Unknown class | |
| Mite mix (d1-d2-d3-d70-d71-d72-d73-d74) | 04251557101078 | Astra Biotech GmbH | Unknown class | |
| Mock-orange (Philadelphus coronarius) | 04251557107841 | Astra Biotech GmbH | Unknown class | |
| Mosquito (Aedes communis) | 04251557106233 | Astra Biotech GmbH | Unknown class | |
| Mosquito (Culex pipiens) | 04251557106257 | Astra Biotech GmbH | Unknown class | |
| Moth (Heterocera mix) | 04251557106158 | Astra Biotech GmbH | Unknown class | |
| Mould mix (m1-m2-m3-m4-m6) | 04251557101528 | Astra Biotech GmbH | Unknown class | |
| Mould mix (m1-m2-m3-m5-m6-m8) | 04251557101535 | Astra Biotech GmbH | Unknown class | |
| Mouse epithelium | 04251557102730 | Astra Biotech GmbH | Unknown class | |
| Mouse epithelium, serum proteins and urine proteins | 04251557102860 | Astra Biotech GmbH | Unknown class | |
| Mozzarella cheese | 04251557104772 | Astra Biotech GmbH | Unknown class | |
| Mucor mucedo | 04251557106806 | Astra Biotech GmbH | Unknown class | |
| Mucor racemosus | 04251557106677 | Astra Biotech GmbH | Unknown class | |
| Mugwort (Artemisia vulgaris) | 04251557108046 | Astra Biotech GmbH | Unknown class | |
| Mulberry (Morus alba) | 04251557107773 | Astra Biotech GmbH | Unknown class | |
| Mushrooms (Champignons) | 04251557104406 | Astra Biotech GmbH | Unknown class | |
| Mustard | 04251557103614 | Astra Biotech GmbH | Unknown class | |
| Mutton | 04251557103607 | Astra Biotech GmbH | Unknown class | |
| Nameko | 04251557104253 | Astra Biotech GmbH | Unknown class | |