HOMA2-%B (HOMA2 beta‑cell function) is an estimate of pancreatic beta‑cell insulin secretion derived from fasting glucose and insulin (or C‑peptide) using the updated HOMA2 model. It’s expressed as a percent of a healthy reference (100% normal). Higher values suggest compensatory increased secretion; lower values indicate impaired beta‑cell function. It’s used alongside HOMA2‑IR to assess glucose homeostasis.

Type 2b diabetes is an informal subtype of type 2 diabetes where defective insulin secretion (beta‑cell failure) predominates over insulin resistance. It may present with higher glucose levels and often needs earlier use of insulin or insulin‑stimulating drugs alongside diet, exercise and regular monitoring. Management is individualized, focusing on blood‑glucose control, cardiovascular risk reduction and reassessment by a healthcare professional.

A normal HOMA‑%B (beta‑cell function) is roughly around 100% in healthy adults. Values near 100% indicate expected insulin secretion for fasting glucose; higher values suggest compensatory hypersecretion (often with insulin resistance), while substantially lower values indicate impaired beta‑cell function. Reference ranges and calculation methods vary by lab and population, so interpret results with clinical context and follow‑up testing.

HOMA2 is an updated computer model of the Homeostatic Model Assessment that estimates insulin resistance (HOMA2‑IR) and beta‑cell function (HOMA2‑%B) from fasting glucose and insulin (or C‑peptide). It improves on the original HOMA by accounting for nonlinear glucose–insulin physiology, hepatic/peripheral insulin resistance and proinsulin, giving more physiologic estimates used clinically and in research.

HOMA‑b stands for Homeostasis Model Assessment of Beta‑cell function. It estimates pancreatic beta‑cell insulin secretion from fasting glucose and insulin (or C‑peptide) levels, giving an index of beta‑cell performance used alongside HOMA‑IR to assess glucose homeostasis. It’s a simple, widely used tool in clinical and research settings to monitor beta‑cell function and progression of insulin deficiency.

Normal HOMA2 results: HOMA2-IR (insulin resistance) is about 1.0 (commonly ~0.4–1.4). HOMA2-%S (insulin sensitivity) and HOMA2-%B (beta‑cell function) are indexed around 100% (lower %S = less sensitivity; %B reflects insulin secretion). HOMA2-IR >1.8 suggests insulin resistance; >2.9 indicates more marked resistance—interpret with a clinician, as cutoffs vary.