This trial is conducted in Europe. The aim of the trial is to compare the pharmacokinetic properties (the exposure of the trial drug in the body) of faster-acting insulin aspart (FIAsp) after different injection regions and routes of administration in healthy subjects.

Inclusion Criteria:

• Male or female, aged 18-64 years both inclusive at the time of signing informed consent
• Considered generally healthy upon completion of medical history, physical examination,analysis of laboratory safety variables, vital signs and ECG (electrocardiogram), as judged by the investigator
• Body mass index 20.0-28.0 kg/m^2 (both inclusive)

Exclusion Criteria:

• Subject who has donated any blood or plasma in the past month or more than 500 mL within 3 months prior to screening
• Smoker (defined as a subject who is smoking at least one cigarette, cigar or pipe daily)
• Not able or willing to refrain from smoking and use of nicotine substitute products during the inpatient period