VITAMIN B12 · TESTED · PEARL DISTRICT, PORTLAND
VITAMIN B12: FIND OUT IF YOU’RE LOW.
Most places will sell you a B12 shot on the way out the door. We'd rather know your level first — because if it's normal, an injection isn't going to do much, and we'd be taking your money to tell you otherwise.
Labs run before treatment plan · Required for our weight-loss patients · 1130 NW 10th Ave, Portland
THE PART MOST CLINICS LEAVE OUT
IF YOUR B12 IS NORMAL, A SHOT PROBABLY WON’T CHANGE HOW YOU FEEL.
This is well established and not especially controversial. Research consistently finds no performance or energy benefit from B12 supplementation in people who aren't deficient, and no cognitive benefit in adequately nourished adults. Mayo Clinic's position is that unless your levels are low, B12 shots aren't likely to give you more energy — and that there's no solid proof they help with weight loss.
We're telling you this on the page that sells B12 injections because the treatment is genuinely valuable for the people who need it, and we'd rather find those people than sell shots to everyone. The useful question isn't "do I want a B12 shot." It's "is my B12 low, and why."
WHO’S ACTUALLY AT RISK
DEFICIENCY HAS CAUSES, NOT VIBES.
B12 absorption depends on stomach acid and a protein called intrinsic factor. Most deficiency traces back to something interfering with one of those, or to simply not taking enough in. If one of these describes you, testing is worth doing.
MEDICATION
Long-term metformin
Metformin can reduce B12 absorption and meaningfully lower serum levels over time. Common, and frequently unmonitored.
MEDICATION
Acid reducers
Proton pump inhibitors and H2 blockers interfere with releasing B12 from food. Years of daily omeprazole adds up.
SURGICAL
Bariatric surgery
Procedures that remove or bypass part of the stomach reduce intrinsic factor. Lifelong supplementation is standard here.
AUTOIMMUNE
Pernicious anemia
The body stops producing intrinsic factor altogether. Oral B12 largely can't be absorbed, which makes this the clearest case for injection.
DIET
Plant-based eating
Natural B12 is essentially limited to animal foods. Vegans and long-term vegetarians without supplementation are a well-documented risk group.
AGE & INTAKE
Over 60, or eating very little
Absorption declines with age. And if you're on a GLP-1 and eating a fraction of what you used to, total intake is worth a look - especially alongside metformin.
WHAT DEFICIENCY CAN LOOK LIKE
Fatigue that rest doesn't fix
Numbness or tingling in hands and feet
Brain fog, memory changes, low mood
Heart palpitations, shortness of breath
A sore or inflamed tongue
Pallor, or anemia found on routine labs
WORTH KNOWING
Your body stores B12 for years, so symptoms can take a long time to appear — and a long time to explain
These symptoms overlap with thyroid disease, iron deficiency, sleep disorders and depression
Which is exactly why we test rather than guess. A shot that masks the wrong problem is worse than no shot
If your labs point somewhere else, we'll tell you and refer appropriately
INJECTION OR PILL
WHEN THE SHOT IS THE BETTER TOOL.
| High-dose oral B12 | Injection | |
|---|---|---|
| Correcting a low level | A Cochrane review found high oral doses normalized serum B12 comparably to intramuscular injection | Also effective, and the traditional route |
| When absorption is the problem | Limited by the same mechanism causing the deficiency in the first place | Bypasses the gut entirely — the case for pernicious anemia, post-bariatric patients, significant IBD |
| Consistency | Requires taking it daily, indefinitely, without missing | A scheduled visit. For some people that’s the difference between a plan that works and one that doesn’t |
| Speed | Steady correction over weeks | Delivered directly, useful when levels are substantially low |
| Cost over a year | Low | Higher — worth weighing honestly against the above |
We’ll say plainly that for a lot of people a well-chosen oral supplement is the right answer, and we’ll tell you so. Injections earn their place when absorption is impaired, levels are substantially low, or adherence to a daily pill realistically isn’t happening.
WHAT TO EXPECT
FOUR STEPS, IN ORDER.
01
Consultation & history
What you're feeling, what you're taking, how you eat, what surgeries you've had. Most of the answer is usually in the history.
02
Testing
We run labs. Serum B12, plus related markers depending on your history and what we're trying to rule out. This isn't an add-on we upsell — for every patient in our medical weight loss program, lab work is required, not optional.
03
Cause based plan
Oral, injection, or neither. If the cause is a medication you need, we work around it rather than ignoring it.
04
Retest
Treating without rechecking is guessing. We recheck to confirm it's working and to adjust the interval.
YOUR PROVIDERS
Who will be treating you.
Tara, RN
Aesthetic Injector, Certified Trainer
15 years experience. Member of Galderma’s national training team alongside Dr. Rajani, Tara specializes in neurotoxins, fillers, collagen stimulators, and Kybella. Patients love her educational, personalized approach and the confidence she inspires with natural, high-quality results.
Olivia, RN
Advanced Injector
10 years experience. Half of her career has been dedicated to working under Dr. Rajani, where she honed her expertise in injectables, regenerative skin therapies, and wellness-based care. Patients appreciate her blend of precision and artistry, as well as her philosophy of treating everyone like family.
WHAT OUR PATIENTS ASK
VITAMIN B12 FAQS
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If you're deficient and the deficiency is what's causing your fatigue — very possibly, and sometimes dramatically. If your level is normal, the honest answer is no, and the research is fairly consistent on that. We'd rather find out which situation you're in than sell you a shot and let you hope.
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There's no solid evidence that it does. B12 is involved in energy metabolism at the cellular level, which is where the marketing claim comes from, but that isn't the same as causing weight loss. If weight is what you're working on, we have an actual medical weight loss program and we'd rather talk to you about that.
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Often, yes — and we'll tell you when that's the better answer. High-dose oral B12 has been found to normalize levels comparably to injections in people who can absorb it. The exceptions matter, though: if you've had bariatric surgery, have pernicious anemia, or have significant intestinal disease, the pill can't get in and the injection can.
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It depends on how low you are and why. A correction phase is usually more frequent, then a maintenance interval set by your retest results. We won't put you on an open-ended weekly schedule without a reason for it.
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If you're in our weight loss program, we're already checking — lab work is required for every GLP-1 patient here, not offered as an extra. The reasoning is straightforward: you're eating substantially less than you used to, and many people on GLP-1s are also on metformin, which affects B12 absorption. That's not a reason to assume you're low. It's a reason to look, on a schedule, rather than waiting for symptoms that can take years to show up.
If you're on a GLP-1 prescribed somewhere that isn't checking your labs, that's worth asking them about.
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If you've had B12 checked recently, bring it. There's no reason to repeat a test you just had.
START WITH A NUMBER
Bring a list of your medications and any recent blood work. Between those and a conversation, we can usually tell you fairly quickly whether B12 is worth pursuing or whether something else is going on.
Style Aesthetics · 1130 NW 10th Avenue, Portland, OR 97209
Important information
This page is general health information and is not medical advice. Vitamin B12 injections are appropriate for treating or preventing B12 deficiency. There is no established evidence that B12 supplementation improves energy, athletic performance, cognition or body weight in people who are not deficient. Symptoms of B12 deficiency overlap with those of other conditions and should be evaluated by a medical provider; a low B12 level also has underlying causes that may require their own workup. Injection site reactions can occur. Treatment decisions are made after an individual evaluation, and individual results vary.
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