| Abdominal pain |
| Alopecia |
| Anorexia |
| Blepharitis |
| Corneal opacities |
| Delayed wound healing |
| Depression |
| Dermatitis (especially around mouth and anus) |
| Diarrhea |
| Dysarthria |
| Dysgeusia (impaired taste) |
| Fever |
| Glossitis |
| Growth retardation |
| Hypogonadism |
| Immune dysfunction |
| Impaired concentration |
| Intention tremor |
| Nervousness |
| Night blindness |
| Nystagmus |
| Paronychia |
| Pica |
| Stomatitis |
