If you are an adult who just heard "type 1," you may be doing a double take, because the story everyone is told is that type 1 is diagnosed in kids and type 2 in adults. It is not that clean. Type 1 is an autoimmune disease that can begin at any age, and when it starts slowly in adulthood it has its own name, LADA. The first job in the first month is making sure the diagnosis is right, because the wrong label leads to the wrong treatment.
Why adult type 1 gets mistaken for type 2
The default assumption for an adult with high blood sugar is type 2, so many people with adult-onset type 1 are started on metformin and lifestyle changes and sent home. For a while it seems to work, because in LADA the pancreas is failing gradually. Then the pills stop holding the numbers, and the person is labeled a "poorly controlled type 2" when the truth is they have autoimmune diabetes that has always needed insulin. The clues that should prompt a second look: you are not overweight, your blood sugar climbed quickly or ran very high at diagnosis, oral medications aren't working as expected, or you have other autoimmune conditions (thyroid disease, celiac). None of these prove type 1 on their own, and together they are a reason to test.
The two tests that settle the question
- Diabetes autoantibodies. Type 1 and LADA are autoimmune, so the blood carries antibodies against the insulin-making cells. GAD65 is the most common one tested; others include IA-2 and ZnT8. A positive result points strongly to type 1 or LADA.
- C-peptide. A measure of how much insulin your own body is still producing. Low C-peptide fits type 1 (little insulin made); a normal or high level fits type 2 (plenty of insulin, but the body resists it).
You can ask for these by name: "Given how my diabetes is behaving, can we check GAD antibodies and a C-peptide to confirm the type?" It is a reasonable request, and the answer changes your treatment.
Why insulin is the treatment, not a failure
There is a stubborn myth, even carried over from type 2 messaging, that starting insulin means you did something wrong. For type 1 and LADA, insulin is simply the missing hormone your body no longer makes. Starting it is not a last resort or a punishment; it is the correct first-line treatment. In LADA specifically, starting insulin earlier rather than pushing pills is often better for preserving what pancreas function remains. If the cost of insulin is the worry, that is a solvable problem with manufacturer caps and same-day options, not a reason to delay.
Your first 30 days: the survival skills and the setup
- Learn the survival skills with a diabetes educator: dosing basal and mealtime insulin, counting carbs, recognizing and treating a low, and checking ketones when you run high.
- Get a CGM. Insurance covers continuous glucose monitors for type 1, and for a newly diagnosed adult it turns an abstract disease into a visible feedback loop that teaches you fast.
- Get glucagon prescribed and show someone close to you how to use it.
- See endocrinology. Ask for a referral if you were diagnosed in primary care or the ER. Type 1 is managed by an endocrinologist with a diabetes educator, and the first follow-up should be within a couple of weeks.
- Set up the coverage. Confirm your insulin and supplies are on the formulary and know where your deductible stands so the pharmacy isn't a surprise.
How Kite handles this
Kite helps you walk into the appointment ready: it drafts the ask for antibody and C-peptide testing, keeps your readings and symptoms organized so the pattern is clear, and once you are diagnosed it helps with carb counts, low and high situations, and the coverage paperwork, in one thread between visits. It supports your endocrinologist's plan; it does not set it. Text Kite to start.