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Know what’s in your vial.
What’s in compounded tirzepatide? B12, glycine and other added ingredients, explained
Compounded tirzepatide is tirzepatide in a sterile liquid, usually with a preservative. Some pharmacies add B12, B6, glycine, L-carnitine or niacinamide; there’s little evidence these extras help, and B12 is why some vials look red. Your vial’s label is the ingredient list that counts.
- B12, glycine, L-carnitine: what each one is
- Red vial? Usually B12
- Questions about your vial? Call us, not the pharmacy
Published by NexLifeLegitScript-certifiedUpdated October 9, 2026Medically reviewed by the NexLife clinical team, led by Adam Kennah, MD (NPI 1144260043)
Your vial, in short
- Active ingredient
- Tirzepatide (GIP and GLP-1)
- Base
- A sterile liquid for injection
- Preservative
- In multiple-dose vials, such as benzyl alcohol
- Possible add-ins
- B12, B6, glycine, L-carnitine or niacinamide
- Red or pink?
- Usually vitamin B12
Something about your vial looks off? Call or text (949) 818-8000. We check with the pharmacy for you.
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The basics
What’s in the vial, ingredient by ingredient
| Ingredient | What it does | In every vial? |
|---|---|---|
| Tirzepatide | The active ingredient. It acts on two hormone pathways, GIP and GLP-1. | Yes |
| A sterile liquid | The water-based solution it’s dissolved in, made for injection. | Yes |
| A preservative | Keeps a multiple-dose vial free of bacteria between doses. Benzyl alcohol is one example. | In multiple-dose vials |
| Salts and pH adjusters | Keep the liquid stable, at the right strength and acidity. | Often |
| An added vitamin or amino acid | B12, B6, glycine, L-carnitine or niacinamide, at some pharmacies. | Only at some pharmacies |
Exact ingredients and amounts differ by pharmacy, and your prescriber and the pharmacy decide the formulation. Your label is the list that counts.
Add-ins
B12, glycine, L-carnitine and niacinamide: what each one is
Why some pharmacies add them, and what’s actually known.
Vitamin B12 (cyanocobalamin)
A vitamin your body needs for nerves and red blood cells. It’s naturally red, so it turns the liquid red or pink. It doesn’t change the tirzepatide strength on your label.
Glycine
An amino acid, one of the building blocks of protein, which your body also makes. No published trial shows it improves results with tirzepatide.
L-carnitine
A nutrient your body uses to turn fat into energy, sold as a supplement. Its effect added to tirzepatide hasn’t been studied in trials.
Niacinamide
A form of vitamin B3. Pharmacies that add it list it on the label; there’s no trial evidence it adds to tirzepatide’s effect.
Vitamin B6 (pyridoxine)
A B vitamin your body uses to process protein. Like the others, it’s listed on the label when it’s there.
An added vitamin isn’t a loophole. In the FDA’s example, a GLP-1 combined with B12 can still count as essentially a copy of an approved drug when both amounts are within 10% of approved strengths.
Know what’s in your vial.
A compounded medication is only as clear as its label. Yours names the pharmacy and lists what’s inside.
- Vials differ. Two pharmacies can make tirzepatide differently.
- Colors confuse. A red vial can mean B12, not a different medicine.
- Labels get skipped. Strength and storage are on the label, not on a website.
A named pharmacy. A physician who decides.
- Prescribed for you. A licensed physician reviews your history before anything is made.
- One flat price. $169 tirzepatide, $139 semaglutide, at every dose.
- Clear labels. The pharmacy, strength and beyond-use date on every vial.
Real people, real answers. Call or text (949) 818-8000 with any question about your vial.
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Color
Why is my tirzepatide red, pink or clear?
Red or pink? Most likely vitamin B12. Cyanocobalamin is naturally dark red.
Clear? Probably no B12. That’s normal too.
Color isn’t strength. The tirzepatide strength is printed on your label in mg per mL. Two vials of different colors can hold the same dose.
Different from last time? If it looks different from what you’ve received before, or from what your label describes, don’t use it. Call or text us at (949) 818-8000, 24/7. We check with the pharmacy for you and tell you what to do next.
Vial to vial
Why two vials can look different
A different pharmacy
Each state-licensed pharmacy uses its own formulation, so the look can change if your pharmacy does.
A different strength
Strengths are measured in mg per mL, so the same dose can be a different amount of liquid.
An added ingredient
B12 turns the liquid red or pink. Without it, the liquid is clear.
Something looks off
Cloudy liquid, particles, a damaged seal, or a label that doesn’t match your prescription: don’t use it. Call or text us first.
Two medications.
One flat price each.
Both are prepared by state-licensed 503A partner pharmacies and shipped free. Your provider helps you decide which one fits.
$139/mo
Semaglutide
Weekly GLP-1. Care, coaching and shipping included.
Get startedWhat’s inside every plan
- Tirzepatide: compounded, acts on two hormone pathways (GIP and GLP-1), taken once a week
- Semaglutide: compounded, acts on the GLP-1 pathway, taken once a week
- Prepared by state-licensed 503A partner pharmacies
- A licensed provider who reviews your history and follows your dose
- A personalized nutrition plan and a 1:1 coaching call
- Free expedited shipping; orders usually ship within 1 to 2 business days
- 24/7 support from real people, plus physician access during clinical hours
- HSA and FSA cards accepted, and Klarna or Afterpay at checkout
- Prefer no injections? Ask about the sublingual tablet, at its own flat price
Prescription required. Compounded medications are not FDA-approved. On 12-month plans: $139 a month for tirzepatide, $119 for semaglutide, still the same at every dose. Prices checked October 7–8, 2026.
Your dose goes up.
Your price doesn’t.
No membership, no dose surcharges, no surprises. One flat, all-inclusive monthly price at every dose.
| Month one | Month two | Month three | Every month after | |
|---|---|---|---|---|
| Tirzepatide | $169 | $169 | $169 | $169 |
| Semaglutide | $139 | $139 | $139 | $139 |
Paying less somewhere else? Send us a receipt from another licensed U.S. telehealth provider and we’ll match your regular monthly price. See the terms
Month-to-month plan, all-inclusive. Longer plans cost less and stay flat. Tirzepatide is $159, $149 and $139 a month on 3-, 6- and 12-month plans. Semaglutide is $132, $125 and $119.
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Prices from each provider, checked October 7–8, 2026. Brand-name and compounded medications are different products; compounded medications are not FDA-approved. †Price Match Guarantee terms apply.
The NexLife Price Match Guarantee
Keep your price.
Upgrade your care.
Already on compounded tirzepatide or semaglutide? Bring your price to NexLife. If you pay less with another licensed U.S. telehealth provider, we match your regular monthly price for as long as your plan stays active.† You keep your price, and you gain a provider who follows your dose, a personal nutrition plan, a 1:1 coaching call and real people who answer 24/7.
- 1Send a receipt from the last 60 days
- 2A NexLife provider reviews your prescription
- 3Pay your matched price, at every dose
Locked while your plan is activeSame price at every doseNo membership fee
†NexLife Price Match Guarantee: for new members switching from a licensed U.S. telehealth provider with an active prescription for compounded tirzepatide or semaglutide. Send a receipt from the last 60 days and we match your regular all-in monthly price on the month-to-month plan, for the same medication (medication plus required fees; not first-month offers, coupons or prepaid multi-month rates), for as long as your plan stays active. A NexLife provider must determine that treatment is right for you. Not open to people with Medicare, Medicaid or TRICARE coverage. Full terms.
Your label
How to read your label
| On the label | What it tells you |
|---|---|
| Tirzepatide strength | In milligrams per milliliter (mg/mL). Know your dose in milligrams. |
| Added ingredients | Any vitamin or amino acid the pharmacy added, such as cyanocobalamin (B12). |
| Beyond-use date | The date after which you shouldn’t use it. |
| Storage directions | How to store this vial. Follow these, not directions written for other products. |
| Pharmacy name | The state-licensed pharmacy that prepared it. You don’t have to call them: call or text us at (949) 818-8000, 24/7, and we follow up with the pharmacy for you. |
Dose in milligrams, not units. At 10 mg per mL, 50 units (0.5 mL) is 5 mg of tirzepatide; at 20 mg per mL, the same 50 units is 10 mg. If the strength on a new vial is different, don’t guess. Call or text us before your next dose.
NexLife
At NexLife
Prescriptions are filled by Absolute Pharmacy (Lutz, FL), Premium Compounding (Decatur, AL) and Boudreaux’s New Drug Store (Lake Charles, LA), each state-licensed, depending on your location, your provider’s direction and pharmacy availability. Compounded tirzepatide is available only if your prescriber determines that it provides a significant difference for you compared to an FDA-approved product.
Questions about your vial? Ask us.
Call or text (949) 818-8000, 24/7. Real people answer, and we follow up with the pharmacy so you don’t have to.
Tirzepatide ingredients: your questions
Does compounded tirzepatide have B12 in it?
Some formulations do and some don’t. Some pharmacies add vitamin B12 (cyanocobalamin), which turns the liquid red or pink. Your label lists it when it’s there.
Why do pharmacies add B12 to tirzepatide?
They don’t all say. A 2026 review of compounded GLP-1 products found added ingredients in about half of them, and limited evidence for adding vitamins to people without a documented deficiency.
Is tirzepatide with glycine better?
There’s no published trial showing that glycine improves weight loss with tirzepatide. Tirzepatide is the ingredient that does the work.
What is tirzepatide with L-carnitine or niacinamide?
Compounded tirzepatide with an added nutrient: L-carnitine, which the body uses to turn fat into energy, or niacinamide, a form of vitamin B3. Neither combination has been studied in clinical trials.
Why is my tirzepatide pink or red?
Most likely vitamin B12. Color doesn’t tell you the strength; your label does.
Is compounded tirzepatide the same as Zepbound?
No. Compounded tirzepatide isn’t FDA-approved, and its formula can differ by pharmacy. Zepbound has one approved formula, made by Eli Lilly.
Who do I call if my vial looks wrong?
Us. Call or text (949) 818-8000, 24/7. Don’t use the vial; we check with the pharmacy for you and come back with the next step.
Important safety information
Compounded tirzepatide and semaglutide are not FDA-approved, and the FDA hasn’t reviewed them for safety, effectiveness or quality. Both medicines may cause thyroid tumors, including cancer: don’t use either if you or a family member has had medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN 2).
Read the full safety information
In studies with rodents, both medicines caused thyroid tumors; it isn’t known whether they cause them in people. Tell your provider if you notice a lump or swelling in your neck, hoarseness, trouble swallowing or shortness of breath.
Serious side effects can include inflammation of the pancreas (pancreatitis), gallbladder problems, low blood sugar (especially with insulin or sulfonylureas), kidney problems from dehydration, severe stomach problems, serious allergic reactions, vision changes in people with type 2 diabetes, and depression or thoughts of suicide. Tell your care team before any surgery or procedure that uses anesthesia or deep sedation. Don’t combine either medicine with other GLP-1 medicines.
Tirzepatide can make birth control pills less effective: use another method for 4 weeks after you start and after each dose increase. Semaglutide should be stopped at least 2 months before a planned pregnancy. Tell your provider if you’re pregnant, planning to be, or breastfeeding.
This is a summary, not the complete safety information. Read the full Prescribing Information for FDA-approved tirzepatide (Zepbound) and semaglutide (Wegovy), and talk with your provider. You can report side effects to the FDA at 1-800-FDA-1088 or fda.gov/medwatch.
Who checked this page
Adam Kennah, MDMedical Director, NexLife · Board-certified in emergency medicine · NPI 1144260043
Leads the NexLife clinical team, which medically reviewed this page on October 8, 2026.
NexLife editorial teamResearch and pricing
the ingredients in compounded tirzepatide and their roles, the 2026 review of compounded GLP-1 formulations, the FDA’s statement on added ingredients, and the Zepbound label
- Every fact, sourced. Each price and rule links to the page it comes from.
- How we make money. NexLife is a telehealth provider. We earn revenue when people join NexLife.
- Corrections, fast. See something wrong or out of date? Email care@nexlife.us and we’ll fix it.
Know your vial. Keep your price.
Compounded tirzepatide at NexLife is $169 a month at every dose, all in. A licensed provider decides if it’s right for you.
- 1Tell us about you
A short online health assessment, about 3 minutes.
- 2A licensed provider reviews it
You’re prescribed only if treatment is right for you.
- 3We ship it, then stay with you
Our partner pharmacy usually ships within 1 to 2 business days. Free shipping, 24/7 support.
Sources
- Annals of Pharmacotherapy. Belcourt J, Sapowadia A, White CM. Compounded semaglutide and tirzepatide products use unique formulations but efficacy and safety largely unknown (February 2026).
- U.S. Food and Drug Administration. FDA clarifies policies for compounders as national GLP-1 supply begins to stabilize.
- U.S. Food and Drug Administration. FDA’s concerns with unapproved GLP-1 drugs used for weight loss.
- Drugs.com. Cyanocobalamin injection, USP: prescribing information.
- Eli Lilly and Company. Zepbound (tirzepatide) prescribing information.
- NexLife. Compounded tirzepatide plans.
- Novo Nordisk. Wegovy (semaglutide) prescribing information.
- LegitScript. Certification lookup for nexlife.us.
- NexLife. Compounded semaglutide plans.