Being diagnosed with ADHD as an adult can be tricky – one criterion is that “several symptoms were present before the age of 12 years”. ADHD symptoms are also frequently mistaken for symptoms of other mental health conditions in adults such as anxiety, depression, personality disorder, and even bipolar disorder...We spoke to Gareth, 23, Maeve, 27, and Danielle, 24, about their experiences with ADHD in their twenties. Gareth was diagnosed when he was 22, Maeve at 27, and Danielle at 21.