Will B12 give me more energy?

If your B12 is low or borderline, yes: fatigue, brain fog and tingling improve as levels recover, often within weeks. If your level is normal, extra B12 does not add energy. That is why we ask about your history and, when needed, check a level before prescribing.

Usually into the muscle of the upper arm or thigh, or under the skin of the abdomen, once a week to start; your physician shows you and sets the schedule. The kit includes everything.

What are the side effects?

Mostly mild: soreness or a small bruise where you inject, occasional nausea or headache, and with larger choline doses a fishy odor. Serious reactions are rare. Read the safety information above and tell your physician about every medication.

Do I need a blood test?

For B12, often yes: a level tells your physician whether you are deficient and how often you need injections. For lipotropic blends alongside a weight-loss plan, your physician decides from your history. Tests can be arranged locally.

EnergyB12

Vitamin B12 Injection

The classic vitamin B12 (cyanocobalamin) injection to restore low B12 and support energy, focus and red blood cell health, bypassing the gut entirely.

Restores B12 fully even when the gut absorbs it poorly
Supports energy, focus, nerve function and red blood cells
Weekly or monthly injection, dosed by your physician

Monthly and 3-month plans
Starting price applies to the 3-month plan
US-licensed pharmacies
Pause or cancel anytime

Starting at

$189 / mo

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Physician-guided care
Ongoing, expert support
100% online
Free, discreet shipping

Will B12 give me more energy?
If your B12 is low or borderline, yes: fatigue, brain fog and tingling improve as levels recover, often within weeks. If your level is normal, extra B12 does not add energy. That is why we ask about your history and, when needed, check a level before prescribing.
How do I inject it?
Usually into the muscle of the upper arm or thigh, or under the skin of the abdomen, once a week to start; your physician shows you and sets the schedule. The kit includes everything.
What are the side effects?
Mostly mild: soreness or a small bruise where you inject, occasional nausea or headache, and with larger choline doses a fishy odor. Serious reactions are rare. Read the safety information above and tell your physician about every medication.
Do I need a blood test?
For B12, often yes: a level tells your physician whether you are deficient and how often you need injections. For lipotropic blends alongside a weight-loss plan, your physician decides from your history. Tests can be arranged locally.

Vitamin B12 and lipotropic injections are generally well tolerated. The most common effects are mild: soreness, redness or a small bruise at the injection site, and occasionally mild nausea, headache or a fishy body odor from choline in larger doses. B12 is water-soluble and excess is excreted. Rarely, injectable B12 can cause an allergic reaction, and it can lower potassium in the first days of correcting a severe deficiency. Not for people with cobalt allergy or Leber's disease (B12) or with a known allergy to any component. Lipotropic blends are not a substitute for a weight-loss plan and are not prescribed during pregnancy or breastfeeding without a specific reason. Stop and seek care for hives, swelling of the face or lips or trouble breathing. Tell your physician about every medication you take, especially metformin, acid reducers and blood thinners.

Disclaimer

Prescription products require an online evaluation with a licensed medical professional who will determine if a prescription is appropriate. Products are compounded by a licensed pharmacy. The FDA has not reviewed or approved compounded products for any use for safety, efficacy, or quality. Compounded medications are not FDA-approved brand-name products.

What is the vitamin B12 injection?

(cyanocobalamin)

Vitamin B12 is needed to make red blood cells, protect nerves and run the chemistry that turns food into energy. Absorbing it from food depends on stomach acid and a protein called intrinsic factor, both of which fall with age, acid-reducing medication, metformin, and gut conditions. An injection delivers B12 straight into the muscle, so none of that matters. Cyanocobalamin is the most studied and most stable form.

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adults over 60 have low or borderline B12, according to the clinical review in the New England Journal of Medicine

1 in 6

B12 injections are well established for deficiency. For people with normal levels, extra B12 does not add energy; your physician checks your level first.

How vitamin and lipotropic injections work

A US-licensed physician reviews your symptoms, history and, when needed, your B12 level, and chooses the injection and schedule. The kit includes everything you need.

Day 1
A US-licensed physician reviews your symptoms, history and, when needed, your B12 level, and chooses the injection and schedule. The kit includes everything you need.
Week 1
A small intramuscular or subcutaneous injection, weekly to start. It takes under a minute; most people do it at home without trouble.
Weeks 2–4
If your B12 was low, energy, focus and tingling usually start improving here as stores refill.
Months 2–3
Your physician checks in, rechecks a level if needed, and stretches the interval or adjusts the blend to match your plan.
Beyond
Injections support the plan; food, movement and sleep do the work. Your physician helps you decide how long to continue.

Results you can feel

EnergyFocus

Steadier energy
the most common change members report
Clearer focus
especially when B12 was low to begin with
Support during weight loss
lipotropic blends alongside a real plan
Nerve and blood health
B12's core job

Individual results vary. Benefits reflect what Zepym Health members commonly report to their physician at check-ins; they are not the results of a clinical trial.

Tested for quality, backed by science

We only work with US-licensed pharmacies that prioritize strict quality control standards, so you can count on purity, potency, and safety.

Pure: compounded to order with pharmaceutical-grade ingredients
Potent: lab-tested to match the labeled dose
Sterile: prepared to USP standards by LegitScript-certified pharmacies

Your plan, reviewed

Physician-reviewed

Dose set by a physician, adjusted at every check-in

Your reviewing physician

Scott Nass, MD

Board-certified family physician. Every injection plan at Zepym Health is reviewed by a licensed physician before anything is prescribed, and adjusted with you as you go.

Meet the team

What the research says

The science of B12 and lipotropic injections

The New England Journal of Medicine's clinical review describes B12 deficiency as common, often missed, and fully correctable with injections that bypass absorption problems.

A 2021 systematic review found B12 supplementation improves fatigue and cognitive symptoms mainly in people who were deficient; that is why your physician checks your level before prescribing.

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Vitamin care that starts with you

Our in-house physicians meet you where you are, and get you to where you want to be.

$189/ mo

Applies to the 3-month plan billed in full ($189/mo on the monthly plan)

What's included

Personalized, physician-guided plan
Monthly and 3-month plans
Dispensed by a US-licensed compounding pharmacy
Unlimited protocol adjustments and messaging
Ongoing support and check-ins
Pause or cancel anytime
Reviewed by our in-house physicians

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Personalized for you

Made for your biology

No two people age the same way, so no two treatments are exactly the same. Your plan is guided by your symptoms, your biology, and your priorities. It's a whole “you” approach to living a better, longer life.

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How it works

Choosing how you age starts here

1
Physician-led
Connect with a physician
Answer a few questions online and a US-licensed physician reviews your health, history and goals to make sure treatment is right for you. 100% online. No in-person visit required.
2
Fast, discreet shipping
Get your discreet shipment
If approved, your treatment is compounded by a US-licensed, LegitScript-certified pharmacy, inspected for quality, and shipped discreetly to your door.
3
100% online
Receive continuous support
Start with one goal, then keep building over time. Unlimited physician messaging, easy refills and dose adjustments, all from the Zepym Health app.

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Disclaimer

The above statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Prescription products require an online evaluation with a licensed medical professional who will determine if a prescription is appropriate. Individual results vary.

Vitamin B12 educational content reviewed by our physician

Scott Nass, MD

Doctor of Medicine, board-certified in Family Medicine

Charles R. Drew University and David Geffen School of Medicine at UCLA. Family Medicine residency at Ventura County Medical Center.

Frequently asked questions

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May the source be with you.

We read the research so you don't have to. Here's what the science says.

1
Clinical practice: vitamin B12 deficiency.
N Engl J Med, 2013
2
Effects of vitamin B12 supplementation on cognitive function, depressive symptoms and fatigue: a systematic review.
Nutrients, 2021
3
Efficacy of different routes of vitamin B12 supplementation for the treatment of deficiency.
Ir J Med Sci, 2024
4
Effects of L-carnitine supplementation on weight loss and body composition: systematic review and meta-analysis of 37 randomized trials.
Clin Nutr ESPEN, 2020
5
Choline bioavailability, liver fat metabolism and the gut microbiota.
Nutrients, 2020

Starting at $189 / mo

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Vitamin B12 Injection

Frequently asked questions

Important safety information and common side effects

What is the vitamin B12 injection?

How vitamin and lipotropic injections work

Day 1

Week 1

Weeks 2–4

Months 2–3

Beyond

Tested for quality, backed by science

Scott Nass, MD

The science of B12 and lipotropic injections

Vitamin care that starts with you

Made for your biology

Choosing how you age starts here

Connect with a physician

Get your discreet shipment

Receive continuous support

Frequently asked questions

01Will B12 give me more energy?

02How do I inject it?

03What are the side effects?

04Do I need a blood test?

Ready to start?

Have more questions?

May the source be with you.