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Insulin Basics

There are different types      https://starmedpharmacy.com/     of insulin depending on how quickly they work, when they peak and how long they last.
Insulin is available in different strengths; the most common is U-100.
All insulin available in the United States is manufactured in a laboratory, but animal insulin can still be imported for personal use.
Inside the pancreas, the hormone insulin is made in the beta cells, which are part of the Islets of Langerhans. These islets also have alpha cells, which make glucagon, as well as delta cells. With each meal, beta cells release insulin to help the body use or store the blood sugar it gets from food.

In the beta cells, insulin is created first as a big molecule called “proinsulin.” Proinsulin is broken into two pieces: insulin and C-peptide. C-peptide is important especially when determining treatment because it can be used to measure how much insulin a person is making. The more C-peptide a person has, the more insulin they are making. This can help a provider determine how much insulin to prescribe.

In people with type 1 diabetes, the pancreas no longer makes insulin. The beta cells have been destroyed and they need insulin shots to use glucose from meals.

People with type 2 diabetes make insulin, but their bodies don’t respond well to it. Some people with type 2 diabetes need diabetes pills or insulin shots to help their bodies use glucose for energy.

Insulin cannot be taken as a pill because it would be broken down during digestion just like the protein in food. It must be injected into the fat under your skin for it to get into your blood. In some rare cases insulin can lead to an allergic reaction at the injection site. Talk to your doctor if you believe you may be experiencing a reaction.

Types of insulin
Rapid-acting insulin, begins to work about 15 minutes after injection, peaks in about one or two hours after injection, and last between two to four hours. Types: insulin  (, and insulin , Humalog)
Regular or short-acting insulin usually reaches the bloodstream within 30 minutes after injection, peaks anywhere from two to three hours after injection, and is effective for approximately three to six hours. Types: Human Regular
Intermediate-acting insulin generally reaches the bloodstream about two to four hours after injection, peaks four to 12 hours later, and is effective for about 12 to 18 hours. Types: NPH
Long-acting insulin reaches the bloodstream several hours after injection and tends to lower glucose levels up to 24 hours. Types:  and , Lantus)
Ultra long-acting reaches the blood stream in six hours, does not peak, and lasts about 36 hours or longer. Types:
Premixed insulin can be helpful for people who have trouble drawing up insulin out of two bottles and reading the correct directions and dosages. It is also useful for those who have poor eyesight or dexterity and is convenient for people whose diabetes has been stabilized on this combination.

In 2015 an inhaled insulin  available in the a rapid-acting inhaled insulin that is administered at the beginning of each meal and can be used by adults with type 1 or type 2 diabetes.  is not a substitute for long-acting insulin. must be used in combination with injectable long-acting insulin in patients with type 1 diabetes and in type 2 patients who use long-acting insulin.

Inhaled insulin begins working within 12 to 15 minutes, peaks by 30 minutes, and is out of your system in 180 minutes. Types: Technosphere insulin-inhalation system (Afrezza)
Characteristics of insulin

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