Misdiagnosed as Type 2 Diabetes? 1 in 10 are!
Diabetes in adults isn't always type 2. Some people diagnosed with type 2 actually have LADA, latent autoimmune diabetes in adults, sometimes called type 1.5. Their immune system is slowly destroying the cells that make insulin.
This matters because no amount of metformin, other type 2 pills, or strict low-carb eating will bring their A1c to normal or stop the damage. They need insulin.
How common is each one? According to the CDC, about 90 to 95% of Americans with diabetes have type 2. LADA is much less common, but it's not rare. In a European study of 6,156 adults diagnosed with diabetes between ages 30 and 70, 9.7% had LADA. That's close to 1 in 10. In the UK Prospective Diabetes Study, 34% of people diagnosed with "type 2" between ages 25 and 34 had GAD antibodies, and 84% of those antibody-positive patients needed insulin within 6 years, compared with 14% of those without antibodies.
Here's how the mistake happens. An adult walks in with high blood sugar. Nine times out of ten that's type 2, so a lazy doctor writes "type 2," prescribes metformin, and never orders a C-peptide, insulin or antibody test. LADA comes on slowly, so at first it looks exactly like type 2, and the pills may even work for a while. When the sugars climb anyway, the patient gets blamed for not trying hard enough, and more pills get added. Meanwhile the pancreas keeps losing insulin-making cells, the high blood sugar keeps doing damage, and some people end up in the hospital with DKA before anyone checks.
Ask your doctor about LADA if:
1. Your blood sugar or A1c stays high even though you eat strict low-carb/keto/carnivore
2. You're losing weight without trying
3. You're thin or normal weight
4. You or a close family member has another autoimmune disease, like Hashimoto's thyroiditis
5. You were diagnosed younger than most people with type 2
Ask for these three tests:
1. C-peptide
2. Fasting serum insulin
3. GAD antibodies
A low C-peptide and low insulin with high blood sugar tells you your pancreas isn't making enough insulin. Positive GAD antibodies tell you why.
If it turns out you have LADA, low-carb still matters. Eating proper human food means you need much less insulin, your blood sugar stays steadier, and you have fewer lows. But it can't replace the insulin your body can no longer make.
If your numbers won't come down no matter how well you eat, it's not your fault. Get tested.
https://www.cdc.gov/diabetes/about/about-type-2-diabetes.htmlhttps://pubmed.ncbi.nlm.nih.gov/23248199/https://pubmed.ncbi.nlm.nih.gov/9357409/