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How to Inject Semaglutide for Weight Loss

Andrea Jeffery, MS, RDN, LD , On June 1, 2025

Mealpro

How do GLP-1 Achieve Weight Loss?

Essentially, GLP-1 medications work by suppressing appetite. Because food intake drops so significantly, there’s a real risk of developing vitamin or nutrient deficiencies while on these medications. Eating a balanced GLP-1 meal plan helps ensure your body still gets the essential vitamins and nutrients it needs, rather than relying on empty calories that offer little nutritional value.

Dosing Conversion Chart

Before injecting compounded Semaglutide for weight loss, it is important to differentiate volume vs potency especially since each manufacturer has different potencies. Similarly to when injecting peptides or other pharmaceuticals, volume is how much liquid is in your syringe but different compounded Semaglutide can have different concentrations. Below is an example of the conversion between volume and potency.

Dosing Example: One vial of injectable Semaglutide has 2.5mg per mL

mg

ml

Units

0.1 mg

0.04 ml

4 Units

0.2 mg

0.08 ml

8 Units

0.3 mg

0.12 ml

12 Units

0.4 mg

0.16 ml

16 Units

A complete GLP-1 regiment includes the use of a weight loss calculator to determine dosage. A wise approach would be to pair the GLP-1 medication for weight loss with a GLP-1 diet plan to achieve lasting results.

Step-By-Step Instructions for How to Inject GLP-1 Medication

  1. Gather your supplies (vial, syringe, two alcohol swabs). Use a 100 unit insulin syringe.

    GLP-1 SEMAGLUTIDE 2.5mg/mL 1.0 0.75 0.5 0.25 Rx Only Refrigerate Single Use LOT: ABC123 EXP: 12/2025 ALCOHOL PREP PAD 70% Isopropyl ALCOHOL PREP PAD 70% Isopropyl 2mL
  2. Wash your hands and dry them well.

  3. If you hav ea new vial, pop the colored cap off and throw it away.

  4. Use an alcohol swab to clean the top of the vial and another to clean your skin where you plan to inject; let the area dry.

  5. Remove both caps from the syringe and fill the syringe with air by pulling the plunger back to your prescribed dose.

  6. Insert the needle into the top of your vial. Slowly press the plunger all the way in. This pushes the air into the vial and makes it easier to withdraw your prescribed amount of units.

  7. Remove the needle and check for air bubbles. Tap the syringe until they disappear, then gently push the plunger to remove any air.

  8. Slightly pinch the skin and the chosen injection site, then push the needle all the way into the skin at a 90-degree angle.

    how to inject glp-1 medication

    GLP-1 Medications are Injected Subcutaneously.

  9. Push the plunger all the way down, then release the sin and remove the needle.

What are risks of being on GLP-1?

Vitamin and nutrition deficiencies are common. Because of appetite reduction if the only calories consumed are empty calories your skin, organs and body will suffer from vitamin deficiencies. Our GLP-1 meal plan is doctor-designed to address these vitamin deficiencies by combining ingredients that give your body the essential vitamins and nutrients it needs.

Tips for how to inject GLP-1 Medication

  1. What if I miss a dose of injecting glp-1:

    • If your next dose is more than two days away: Take your missed dose as soon as possible. Then take your next dose on the regularly scheduled day.
    • If your next dose is less than two days away: Just skip the missed dose and take your next dose on the regularly scheduled day.
    • If you’ve skipped two doses or more consecutively: Contact your physician.
    • Do not administer double doses of compounded Semaglutide.
  2. Injection sites: Inject in the upper arm, abdomen (about 2 inches away from the belly button), or top of the thigh. Do not inject in the same exact spot. Rotate the injection site.

    GLP-1 injection sites

    GLP-1 Medications Injection Sites.

  3. Handling and storing GLP-1 medication: Always store your glp-1 medication in your refrigerator and take the dose prescribed by your physician. Once your compounded Semaglutide vial is punctured, it will need to be discarded after 28 days—even if there’s some medication left.

How GLP-1 Medication Works

Compounded Semaglutide mimics the effects of the GLP-1 hormone. It works by:

  • Enhancing insulin secretion and inhibiting glucagon release.

  • Slowing the movement of food through the gut.

  • Reducing appetite.

  • Signaling a feeling of fullness.

As a result, you feel fuller faster, which can ultimately lead to sustained weight loss.

What Is the Right GLP-1 Diet Plan?

The best GLP-1 meal plan helps prevent vitamin deficiencies.

Because GLP-1 medications carry a risk of vitamin deficiencies, a proper GLP-1 diet plan should include nutritionist-designed meals rich in essential vitamins and nutrients. A comprehensive solution pairs high-quality, compounded medications with a GLP-1 meal plan, creating a powerful program for lasting, healthy lifestyle change.

See GLP-1 Meal Plan

Prevent Nutrition Deficiencies

Andrea Jeffery, MS, RDN, LD

Andrea holds a B.S in Dietetics and a Masters of Science in Nutrition from Idaho State University. She is a licensed dietitian through the Idaho State Board of Medicine. She is currently a MealPro blog contributor and serves as adjunct faculty at Idaho State University.