L-Carnitine

$99

Includes everything you need — vial, syringes, alcohol wipes, and clear instructions.

L-Carnitine is a natural compound that supports brain function by enhancing cellular energy and promoting mental clarity. Our L-Carnitine injections help boost cognitive performance, focus, and overall brain health.

Enhances mental clarity and focus

Supports brain energy metabolism

Reduces mental fatigue

Third-party lab tested for safety and quality

No insurance or doctor visit needed

Free overnight shipping with prescription

Get Started See if treatment is right for me

How do I take it?

Just like our other injections, L-Carnitine is administered just under the skin (SubQ). We include easy instructions and video guidance — it’s quick and straightforward.

Is it safe?

Yes — L-Carnitine is a naturally occurring compound in your body, essential for energy metabolism. Our injections are professionally formulated and safe for regular use.

What comes in the box?

You’ll receive the L-Carnitine vial, syringes, alcohol wipes, and everything you need for a smooth, hassle-free injection experience.

3 easy steps

Tell us about you

Take a short quiz to help us understand what you’re feeling and what you want help with. (Takes less than 2 minutes)

Talk to a licensed doctor

Have a quick video or text consult. They’ll make sure the treatment is safe and right for you.

Get your package at home

Everything is shipped from a licensed U.S. pharmacy with step-by-step instructions. You’ll know exactly what to do — we make it simple.

Why do we need L-Carnitine?

L-Carnitine is more than just an energy booster — it’s a key player in brain health. By supporting mitochondrial function, it helps your brain cells produce the energy they need to stay sharp and focused. If you’re dealing with brain fog or want to optimize your cognitive performance, L-Carnitine can make a noticeable difference.

Testimonials

Join our customers in feeling their best

Lifinity felt like the Apple of longevity. Everything from the online intake to the delivery was seamless. I liked how clear the instructions were and that I could actually talk to a real person. I’ve already recommended it to two colleagues.

Brandon T., 41

New York

Clean, modern, and honestly kind of badass. I loved that I could start with capsules and upgrade later. It didn’t feel pushy, just empowering. I’ve never stuck with a health routine longer than 2 weeks, and now I actually look forward to it.

David R., 36

Miami

My skin feels brighter. My eyes don’t look as tired. I don’t know how to explain it scientifically, but my face looks more alive — and I feel that way inside too.

Michael S., 47

Denver

I was nervous about trying anything involving injections, but Lifinity made me feel safe and supported the whole way. Their care team was responsive, kind, and genuinely wanted to help me feel better. It didn’t feel transactional — it felt personal.

Jessica M., 48

Oregon

I used to crash hard around 2pm and reach for a second coffee. Since starting Lifinity, my energy feels more stable — like my battery lasts longer. It’s subtle but powerful.

Amanda L., 39

Chicago

It’s like my brain went from dial-up to fiber optic. I feel sharper at work, more articulate, and even my mood’s more stable. Lifinity gave me back my edge.

Nina K., 42

Seattle

Support

Frequently asked questions about NAD+ injections

How does it work?

1. Medical Intake
‍Complete a short health questionnaire about your goals, lifestyle, and medical history — no clinic visits required.
‍
‍2. Provider Review
‍A licensed healthcare provider reviews your intake and determines if treatment is right for you. You’ll get answers to any questions, too.
‍
‍3. Prescription Delivery
‍If approved, your prescription is sent to a US-licensed pharmacy and delivered discreetly to your door — shipping included.

‍4. Ongoing Support
‍Access expert guidance and check-ins through your secure patient portal. Adjustments, follow-ups, and support are always available.

Can I cancel my subscription anytime?

Yes — you’re free to cancel at any time. We offer flexibility with no penalties, hidden fees, or long-term commitments.

Are the medications safe?

Absolutely. All prescriptions are written by licensed healthcare professionals and filled by US-licensed pharmacies. Your safety is our highest priority.

Do all plans include prescriptions and medications?

Yes — all Lifinity plans include:

• Online medical evaluations

• Prescription medication (if approved)

• Free shipping

• Ongoing medical support

Medications are only prescribed after a consultation to ensure they’re safe and appropriate for you.

Note: Some medications may be compounded to meet individual needs or address shortages. These are prepared by certified pharmacies but are not evaluated or approved by the FDA. A valid prescription is required.