longevityRx · singlelongevity
Vitamin B12
A little B12 goes a long way.
Vitamin B12 works behind the scenes to support healthy red blood cells, nerve function, and normal energy metabolism.
For people who are deficient or have difficulty absorbing enough B12, injections can help replenish their levels.
replenish · restore · support
Starting at
$25.00
/ per month
- 100% discreet, online consultation
- U.S. board certified physicians
- No insurance required
- Fast shipping
The process
How it works.
Private intake
A short, confidential medical questionnaire — history, medications, and goals — reviewed by a U.S. board-certified physician.
Direct delivery
B12 is injected so it bypasses the gut entirely — useful if absorption is the actual problem.
Settle into a rhythm
Most patients move to a steady weekly or monthly cadence once energy stabilises.
Every prescription is reviewed and written by a U.S. board-certified physician licensed in your state, then dispensed by an accredited U.S. partner pharmacy and shipped directly to you.
Candidacy
Who it’s for.
- Adults 18+ with fatigue, brain fog, or low B12
- Plant-based diets or malabsorption conditions
- Not currently receiving B12 therapy elsewhere
- No cobalt or cobalamin allergy
Final eligibility is always decided by your physician after reviewing your intake and, where needed, your lab work.
What to expect
The timeline.
24–72 hours
Energy boost
Week 1–2
Reduced fatigue, better focus
Ongoing
Steady energy, healthy metabolism
A longer life, lived well.
- Supports low energy and fatigue
- Helps with brain fog
- Supports mood and sleep
- Ideal for plant-based diets
- Bypasses digestive absorption issues
Be informed
Possible side effects.
Every treatment has potential risks and benefits. Your provider will review possible side effects, answer your questions, and help determine whether this treatment is appropriate for your individual needs during your consultation.
Your questions, answered
Frequently asked questions
- Many patients notice an energy lift within 24 to 72 hours, with steadier focus across the first week or two.
- Your physician may request one, particularly if fatigue has other possible causes.
- B12 is water-soluble and excess is excreted, but dosing still follows your physician's schedule.
- Discreetly, in unbranded packaging, with cold-chain shipping when required. Most orders ship within 24–48 hours of physician approval.
- No. TheTideRX is cash-pay and HSA/FSA eligible, with one transparent price and no hidden fees.
- Yes. Cancel anytime from your portal. Unused months on multi-month plans are refundable per our policy.
Important safety information
This page is for general information and is not medical advice. Prescription treatments are only dispensed after a physician review confirms they are appropriate for you. Some therapies are compounded or prescribed off-label and are not FDA-approved in that form. If you are experiencing a medical emergency, call 911.