A Research Study of a New Medicine NNC0363-1063 in Healthy Participants and Participants With Type 1 Diabetes

Inclusion criteria

Part 1A SAD (healthy participants)

• Male or female of non-child bearing potential. Non-child bearing potential being defined as surgically sterilised (i.e. documented hysterectomy, bilateral salpingectomy or bilateral oophorectomy) or being postmenopausal (defined as no menses for 12 months without an alternative medical cause) prior to the day of screening.
• Age 18-64 years (both inclusive) at the time of signing the informed consent.
• Body mass index between 18.5-29.9 kilogram per square metre( kg/m^2) (both inclusive) at the day of screening.
• Considered to be generally healthy based on the medical history, physical examination, and the results of vital signs, electrocardiogram and clinical laboratory tests performed during the screening visit, as judged by the investigator.

Part 1B SAD, Part 2 PoP and Part 3 Meal test (participants with T1D)

• Male or female of non-child bearing potential. Non-child bearing potential being defined as surgically sterilised (i.e. documented hysterectomy, bilateral salpingectomy or bilateral oophorectomy) or being postmenopausal (defined as no menses for 12 months without an alternative medical cause) prior to the day of screening.
• Age 18-64 years (both inclusive) at the time of signing the informed consent.
• Body mass index between 18.5-29.9 kg/m^2 (both inclusive) at the day of screening.
• Diagnosed with type 1 diabetes mellitus greater than or equal to( ≥)1 year prior to the day of screening.
• Considered to be generally healthy (except for mild conditions under stable treatment associated with type 1 diabetes mellitus) based on the medical history, physical examination, and the results of vital signs, electrocardiogram and clinical laboratory tests performed during the screening visit, as judged by the investigator.

Exclusion criteria

Part 1A SAD (healthy participants)

• Male of reproductive age who, or whose female partner(s), is not using an adequate contraceptive method.
• Any condition, which in the investigator's opinion might jeopardise participant's safety or compliance with the protocol.

Part 1B SAD, Part 2 PoP and Part 3 Meal test (participants with T1D)

• Male of reproductive age who, or whose female partner(s), is not using an adequate contraceptive method.
• Any condition, except for mild conditions under stable treatment associated with type 1 diabetes mellitus, which in the investigator's opinion might jeopardise participant's safety or compliance with the protocol.