Your path to prescription B12.
Prescription B12, reviewed by your specialist and delivered cold to your door.
- A dose set by your specialist
- Prescription B12 (methylcobalamin), shipped cold to your door
- A simple at-home routine, under a minute a dose
¹ Allen, Am J Clin Nutr 2009 (about 6% deficient plus close to 20% marginal at 60+); NIH Office of Dietary Supplements. Illustrative, not a measurement. Individual results may vary.
Our recommendation

"Based on your intake, we recommend prescription B12. Your specialist confirms the dose at review."
Why an injection, when the pills didn't do it
It's not about trying harder. It's about what your body can still absorb.
- Eight hours of sleep. Still dragging by 10am.Sleep restores a lot. It doesn't restore B12, which your body needs to turn food into energy and keep nerves working.
- You've taken the B12 pills. Maybe a lot of them.A pill has to get through your stomach first. After 50, the stomach makes less of the acid and protein that pulls B12 out, so much of it never arrives.
- An injection skips the stomach.It goes in under the skin, so absorption doesn't depend on digestion. That's why specialists reach for the injection when pills haven't moved the needle.
- You finally have a tool that matches the problem.It was never about effort. Your body absorbs less than it did, and now there's a prescription built for that.
Your specialists
The same two board-certified specialists review every order and set every dose. Never a random prescriber.

rheumatologistRenanit Barron, M.D.Board-certified
endocrinologist
Endocrinology is the medicine of hormones, metabolism and energy. Rheumatology is inflammation and recovery. Between them, that's most of what people come to B12 for. Married, in practice together since 2003, and they've been treating patients side by side for over 20 years.
4.7/5 Google Review Ratingfrom 1,000+ verified individual patient reviews of the Barron, M.D.'s
"Both of them are thorough, efficient, and personable. I have been seeing them for the past 15 years."
"I have been Dr. Adam Barron's patient for 21 years."
"Thanks to Dr. Renanit Barron, I am finally feeling better than I have felt in years."
"I've finally found two physicians that look beyond passing out drugs and help to work with you on the core of the issues!"
Select your plan
Cancel or pause anytime. No hidden fees.

Your first step. One vial every month, shipped cold, with syringes and wipes in the box. Pause or cancel from your account.
Best forYou want to start with one month and see how you feel
Our lowest price. $79 a month, locked in for as long as you stay. Three vials, shipped cold in one box, a 90-day supply at your door. You never think about reordering.
Best forYou're in for the long run and want one delivery
Not for you? Get refunded.
- 30-day money-back guarantee on your first month*
- No returns required
- Pharmacy-compounded B12 (methylcobalamin) from a licensed U.S. 503A pharmacy
- Reviewed by Adam Barron, M.D. or Renanit Barron, M.D.
- Pause or cancel anytime from your account
*Terms apply to the Yuvia Care Guarantee
Why start today?






What happens next
Step 1Save your card, $0 todayNothing is charged until a specialist approves your order.
Step 2A specialist reviews your orderAdam Barron, M.D. or Renanit Barron, M.D. reads your answers and sets your dose, usually within 24 hours.
Step 3Your B12 ships cold, freeArrives in 1-2 business days after it ships, with syringes and wipes in the box.
Step 4Take your first dose at homeA small injection under the skin, under a minute. Your care team is a message away.
Your questions.
Honest answers.
Everything you need to know, plus specialist support whenever you need it.
Subscription plans are covered by the Yuvia Care Guarantee. Use it as prescribed for at least 14 days, and if it's not for you, email hello@yuvia.health between day 14 and day 30 after your first delivery. We refund your first month and end your subscription. No returns needed. One per person, first subscription only. One-time orders are not covered.
Your B12 injection (methylcobalamin), compounded by a licensed U.S. pharmacy, plus syringes and alcohol wipes, shipped cold to your door, and a simple step-by-step guide. Specialist review, refills on schedule and our U.S.-based care team are all included. You only pay for your medication.
NAD+ injections, B12 injections, glutathione injections, GHK-Cu and NAD+ creams, and a skin protocol. Every treatment is prescription-only and reviewed by the same two board-certified specialists.
Finish the quick health profile, save your card ($0 today), and a licensed specialist reviews your order, usually within 24 hours. If you're approved, your B12 ships cold and arrives in 1-2 business days after it ships. If you're not approved, you're not charged.
Most U.S. states. The intake checks your state first; if we can't serve you yet, we'll tell you right away and let you join the waitlist.
A pill has to be absorbed through the stomach, which gets harder after 50. An injection goes in under the skin, so absorption doesn't depend on digestion. Your specialist decides whether it's right for you.
No. Your specialist reviews your health profile. If they want labs before prescribing, they'll tell you, and you won't be charged.
A tiny insulin-style needle, a quick pinch under the skin of your stomach or thigh, done in seconds. You get a simple step-by-step guide, and our care team can walk you through your first one by email.
A clinic B12 shot runs $25 to $75 a visit, plus the drive and the wait. Yuvia is a month of at-home doses, specialist-reviewed, delivered cold, with no membership or visit fees. You pay for your medication and nothing else.
Your order is reviewed by Adam Barron, M.D. or Renanit Barron, M.D., board-certified specialists practicing since 2003 with 200,000+ patient visits between them. Your B12 is compounded by a licensed U.S. 503A pharmacy. Yuvia is LegitScript certified.
Many patients use an HSA or FSA card at checkout. We will send a receipt you can submit to your plan. Check with your plan for its own rules.
B12 injections are prescription-only and compounded by a licensed U.S. pharmacy. A licensed specialist decides whether they are appropriate for you. Not medical advice.