Okay, I need to create a professional Wikipedia-style document about insulin under the categories of Health, Physiology, and Hormones & Metabolism. Let me start by understanding the requirements.

First, the structure: H1 for the title, an overview section, several sections with H2 and H3 headings, and maybe references or related documents. The content needs to be accurate, objective, detailed enough, easy to read, and use technical terms with explanations. Also, markdown formatting with proper headings, lists, tables, code blocks if needed, and at least 800 characters.

Starting with the title: "인슐린" as given. Then an overview section explaining what insulin is, its role in the body, maybe a brief history. Next sections could be structure and function, regulation of blood sugar, types of diabetes related to insulin, clinical applications, and references.

For the structure and function part, I should describe the hormone's composition—alpha and beta chains, how it's produced in the pancreas. Mention the role in glucose uptake by cells, glycogen synthesis, etc. Maybe a table comparing insulin's functions with other hormones like glucagon.

Regulation of blood sugar: explain the feedback loop between insulin and glucose levels. How insulin lowers blood sugar, what happens when there's too much or too little. Also mention the role of the liver in storing and releasing glucose.

Types of diabetes: Type 1 (autoimmune destruction of beta cells), Type 2 (insulin resistance), gestational diabetes. Maybe a section on each with causes, symptoms, treatments. Use bullet points for clarity.

Clinical applications could include insulin therapy, different types of insulin (rapid-acting, long-acting), administration methods like injections or pumps. Also mention monitoring blood sugar levels and the importance of managing diabetes to prevent complications.

References: Need to cite reliable sources like medical journals, textbooks, or reputable health organizations. Maybe list them in a references section with proper formatting.

I should check for technical terms—like "beta cells," "glycogen synthesis," "insulin resistance"—and explain them briefly if necessary. Avoid overly complex sentences. Use headings appropriately: H2 for main sections like Structure and Function, Regulation of Blood Sugar, etc., and H3 for subsections like "Structure of Insulin" or "Types of Diabetes."

Make sure the document is over 800 characters. Let me count: each section should have enough detail. Maybe add a table comparing insulin types, or a diagram of the feedback loop, but since it's markdown, I can use text-based tables.

Also, check for accuracy. For example, insulin is produced by beta cells in the pancreas, consists of two chains, and works with glucagon to regulate blood sugar. Type 1 is autoimmune, Type 2 is resistance or insufficient production. Insulin therapy includes various types like regular, NPH, long-acting analogs.

Avoid any markdown that's not allowed. Use proper headings, lists, tables. Maybe include a code block for a sample insulin regimen, but that might be too technical. Alternatively, use bullet points for treatment options.

Need to ensure the flow is logical: introduction, structure/function, regulation, diabetes types, clinical aspects, references. Keep paragraphs concise. Check for any errors in information and make sure all claims are backed by reliable sources.