Islets of Langerhans endocrine part of pancreas.
No food contains insulin. Insulin is an hormone that is produced within the body. Diabetics that need to take insulin for their condition have to take it via injection.
Endogenous insulin (that produced within the body) regulates the level of blood sugar.
Humans, who are not diabetic, make the insulin they need within their own bodies.
Insulin's chief role in the body is to keep blood sugar within a fairly narrow "comfort" zone.
A low level of glucose in urine could indicate hypoglycemia, an overdose of insulin, or an overabundance of the insulin produced within the body.
According to Wikipedia the thyroid gland, the pituitary gland, and the pancreas are part of the endocrine system. The main function of these, and other glands within the endocrine system, is to secrete hormones into the blood.
KDEL an amino acid sequence which signals that a protein belongs in the endoplasmic reticulum. Attaching it to insulin would cause the insulin to be retained within the endoplasmic reticulum.
Glucophage
Ultra-lente is a long-acting form of insulin that starts to work within four to eight hours and lasts 28-36 hours.
The type of insulin that typically peaks within 2-4 hours is known as short-acting insulin. Examples of this category include regular insulin, which is often used to manage blood glucose levels during meals. This insulin works quickly to lower blood sugar but has a shorter duration compared to longer-acting insulins. It is important for individuals using short-acting insulin to monitor their blood sugar levels to avoid hypoglycemia during its peak action time.
Insulin is not an organism. It is not alive. Insulin is a protein hormone that is active within our bodies. It is secreted by our pancreas after meals when our blood sugar levels are high and tells the cells in our body to take glucose from the blood and store it as glycogen.
Insulin is a hydrophilic hormone with hydrophobic regions located within its structure. The hydrophilic portions of insulin enable it to dissolve in the bloodstream, facilitating its transport to target cells. The hydrophobic areas tend to have nonpolar amino acid residues and are important for the stability and structure of the insulin molecule.