In Stock
B12
Starting at $199/month
Essential for energy, focus, and mood – B12 injections give your body the boost it needs to feel vibrant and sharp. Potential benefits include:
- Increases natural energy levels
- Supports mood and mental clarity
- Boosts metabolism and red blood cell production
- USA Based Pharmacies
- Board-Certified Providers
- HSA/FSA Eligible
- Free Shipping
- USA Based Pharmacies
- Board-Certified Providers
- HSA/FSA Eligible
- Free Shipping
Recommended by medical professionals and loved by high-performers, our methylcobalamin B12 injections are a simple, effective way to elevate your daily wellness
- Methylcobalamin for Superior Absorption
- 100% Online Convenience
- Medications Delivered
Why B12?
Vitamin B12 plays a vital role in energy production, brain function, and cellular health. When taken as a high-quality injection, it bypasses the digestive system for faster, more effective results – perfect for those with low levels or looking to optimize their vitality.
Cellular Energy Production
Powers up your body at a cellular level for sustained energy without the crash.
Mood & Cognitive Support
Helps regulate mood and mental clarity by supporting brain and nervous system function.
Metabolic Health
Supports red blood cell formation and healthy metabolism for long-term vitality.
How It Works

Free Consultation
Quick, simple and no obligations. Share your health history, goals & have all questions answered by our team.

Provider-Approved Prescription
Personalized medication & dosing tailored to you. We offer microdosing, low-dosing and more. Only pay if you & our provider decide this is the best step forward and you're prescribed medication.

Your Plan, Your Pace
Once approved, our partner pharmacies will deliver your medication right to your door. Subscribe for convenient monthly delivery with free shipping!

Sustainable Health & Results
We believe in whole body health & we're here to help you along the way. Feel great, stay consistent, and achieve lasting wellness.
“Their team is extremely knowledgeable and are there to serve and provide the best experience with high quality products. Highly recommended!”
– Ali
Questions?
We are here to help
How does a B12 injection work?
B12 injections deliver methylcobalamin directly into your bloodstream, bypassing digestion for maximum absorption. This supports energy production, mood regulation, and red blood cell formation more effectively than oral supplements.
What type of B12 does ZestRx use?
We use methylcobalamin, a bioavailable and highly absorbable form of B12. It’s the preferred option for those looking for optimal cellular support, energy, and brain function.
Who can benefit from B12 injections?
Anyone experiencing fatigue, brain fog, low mood, or a plant-based diet may benefit. B12 injections are also ideal for those with absorption issues or low B12 levels due to age or medications.
How often should I take a B12 injection?
Most people start with one injection per week and adjust based on their provider’s guidance and individual needs. Our team offers free consultations to help personalize your plan.
Are there any side effects of B12 injections?
B12 injections are generally well tolerated. Mild side effects are rare but may include slight soreness at the injection site or a temporary feeling of warmth.
Can I take B12 with other supplements or medications?
B12 is often safe to take alongside most supplements and medications – however, always check with your provider first. It may even enhance the effects of other wellness treatments by supporting mitochondrial function and overall energy levels. ZestRx providers will review your current medications and health history before dispensing.