B12 Injections vs Tablets: Which Raises Levels Faster?

Klein, Thomas; Weber, Hans; Mitchell, Sarah

ທາງເລືອກໃດທີ່ເພີ່ມລະດັບວິຕາມິນ B12 ໄວທີ່ສຸດ?

ການສັກຢາ B12 ເຮັດໃຫ້ລະດັບ serum ທີ່ວັດແທກໄດ້ສູງຂຶ້ນໄວກ່ວາເມັດ, ມັກຈະພາຍໃນສອງສາມຊົ່ວໂມງ, ເພາະວ່າມັນຂ້າມຜ່ານລໍາໄສ້. ສໍາລັບຜູ້ໃຫຍ່ສ່ວນໃຫຍ່ທີ່ຫມັ້ນຄົງກັບການຂາດທີ່ຢັ້ງຢືນ, ຢ່າງໃດກໍຕາມ, ປະລິມານຢາປາກເປົ່າ 1,000-2,000 microgram ຕໍ່ມື້ສາມາດເຕີມເງິນສະສົມຂອງຮ່າງກາຍແລະປັບປຸງຈໍານວນເລືອດໃນໄລຍະອາທິດດ້ວຍອັດຕາທີ່ຄ້າຍຄືກັນທາງຄລີນິກ.

ການສັກຢາສ້າງຈຸດສູງສຸດໃນຕອນຕົ້ນຢ່າງແຫຼມຄົມເພາະວ່າ hydroxocobalamin ຫຼື cyanocobalamin ຖືກສົ່ງໂດຍກົງເຂົ້າໄປໃນກ້າມຊີ້ນແລະຈາກນັ້ນກໍ່ໄຫຼວຽນ. ຈຸດສູງສຸດຂອງຫ້ອງທົດລອງນັ້ນບໍ່ແມ່ນສິ່ງດຽວກັນກັບການສະສົມຂອງເນື້ອເຍື່ອທີ່ຟື້ນຟູ ຫຼືການເຮັດວຽກຂອງເສັ້ນປະສາດທີ່ສ້ອມແປງ; ໃນການປະຕິບັດຂອງຂ້ອຍ, ການຟື້ນຕົວຂອງອາການແມ່ນວັດແທກເປັນອາທິດຫາເດືອນ, ບໍ່ແມ່ນມື້ຕໍ່ໄປ.

ການປຽບທຽບທີ່ໃຊ້ໄດ້ຈິງມັກຈະແມ່ນ ຊົ່ວໂມງ vs ມື້ສໍາລັບຄວາມເຂັ້ມຂຸ້ນຂອງ serum, ແຕ່ປະມານ 4-8 ອາທິດສໍາລັບການຕອບສະຫນອງ hematologic ທີ່ມີຄວາມຫມາຍ ດ້ວຍເສັ້ນທາງທີ່ພຽງພໍ. Reticulocytes ມັກຈະເພີ່ມຂຶ້ນໃນວັນທີ 3-5, hemoglobin ເລີ່ມດີຂຶ້ນຫຼັງຈາກປະມານ 1-2 ອາທິດ, ແລະ macrocytosis ສາມາດໃຊ້ເວລາເຖິງ 8 ອາທິດເພື່ອ settle.

ແຄນເທສຕີ ເປັນ AI ເຄື່ອງວິເຄາະເລືອດ ທີ່ເຮັດໃຫ້ B12 ຢູ່ຂ້າງ MCV, hemoglobin, folate, creatinine ແລະ ຜົນໄດ້ຮັບກ່ອນຫນ້າແທນທີ່ຈະປິ່ນປົວຄວາມເພີ່ມຂຶ້ນຂອງ B12 ຫຼັງການປິ່ນປົວເປັນຫຼັກຖານວ່າບັນຫາພື້ນຖານໄດ້ຖືກແກ້ໄຂ. ຜູ້ອ່ານຍັງສາມາດປຽບທຽບຜົນໄດ້ຮັບຂອງພວກເຂົາກັບ ຄູ່ມືການວັດແທກ B12.

“ໄວ” ທີ່ແທ້ຈິງຫມາຍຄວາມວ່າແນວໃດ

ຜົນໄດ້ຮັບສູງຫຼັງຈາກການສັກຢາຢືນຢັນການສໍາຜັດເມື່ອບໍ່ດົນມານີ້, ບໍ່ຈໍາເປັນຕ້ອງສົ່ງ cellular ທີ່ພຽງພໍ. Methylmalonic acid, ຜົນການຄົ້ນພົບທາງລະບົບປະສາດ ແລະ ແນວໂນ້ມ CBC ມີຂໍ້ມູນຫຼາຍກວ່າເມື່ອການວິນິດໄສເບື້ອງຕົ້ນບໍ່ແນ່ນອນ.

ວິທີການດູດຊຶມວິຕາມິນ B12 ທາງປາກເຮັດວຽກແນວໃດເມື່ອປັດໄຈພາຍໃນຕ່ຳ

B12 ປາກເປົ່າໃນປະລິມານສູງສາມາດເຮັດວຽກໄດ້ເຖິງແມ່ນວ່າການດູດຊຶມ intrinsic-factor ຈະມີຄວາມບົກຜ່ອງເພາະວ່າສ່ວນນ້ອຍເຂົ້າໄປໂດຍການແຜ່ diffusion. ປະມານ 1% ຂອງປະລິມານ 1,000 microgram ອາດຈະຖືກດູດຊຶມໂດຍ passive diffusion, ໃຫ້ປະມານ 10 micrograms—ສູງກວ່າຄວາມຕ້ອງການປະຈໍາວັນສະເລ່ຍ 2.4 micrograms ສໍາລັບຜູ້ໃຫຍ່.

B12 ທີ່ຜູກຕິດກັບອາຫານຕາມທໍາມະຊາດຕ້ອງຖືກປ່ອຍອອກໂດຍອາຊິດກະເພາະອາຫານ, ຜູກກັບ intrinsic-factor, ແລະ ຖືກດູດຊຶມໃນ ileum ປາຍ. ລະບົບຫຼາຍຂັ້ນຕອນນີ້ອະທິບາຍວ່າເປັນຫຍັງການສະກັດກັ້ນອາຊິດໃນໄລຍະຍາວ, autoimmune gastritis, ພະຍາດ ileal ແລະ ຫัตຖການ bariatric ສາມາດເຮັດໃຫ້ເກີດການຂາດແຄນ; ມັນຍັງອະທິບາຍວ່າເປັນຫຍັງ multivitamin ມາດຕະຖານຈຶ່ງມັກຈະມີປະລິມານໜ້ອຍເກີນໄປສໍາລັບການປິ່ນປົວ.

ການດູດຊຶມ B12 ທາງປາກແມ່ນຂຶ້ນກັບປະລິມານແຕ່ບໍ່ແມ່ນເສັ້ນຊື່. ວິທີການ intrinsic-factor ຈະອີ່ມຕົວປະມານ 1.5-2 micrograms ຕໍ່ອາຫານ, ໃນຂະນະທີ່ passive diffusion ຈະມີປະໂຫຍດທາງຄລີນິກພຽງແຕ່ມີເມັດໃນລະດັບ milligram. ອາຫານເສີມ 50 microgram ຖືວ່າເປັນການປ້ອງກັນທີ່ສົມເຫດສົມຜົນສໍາລັບບາງຄົນ, ແຕ່ມັນບໍ່ເທົ່າກັບ 1,000 micrograms ສໍາລັບການຂາດແຄນທີ່ຢັ້ງຢືນແລ້ວ.

ສໍາລັບຄົນເຈັບທີ່ໃຊ້ omeprazole, pantoprazole ຫຼື PPI ອື່ນໆ, ຂ້າພະເຈົ້າໄດ້ກວດສອບຮູບແບບທີ່ກວ້າງຂວາງ—ອາຫານ, ອາຍຸ, ພະຍາດເລືອດຈາງ ແລະ ໄລຍະເວລາຂອງການນໍາໃຊ້—ແທນທີ່ຈະສົມມຸດວ່າຢາແມ່ນເລື່ອງທັງຫມົດ. ການທົບທວນຂອງພວກເຮົາກ່ຽວກັບ ການຕິດຕາມຫ້ອງທົດລອງ PPI ໄລຍະຍາວ ອະທິບາຍວ່າເປັນຫຍັງແມກນີຊຽມແລະທາດເຫຼັກອາດຈະມີຄວາມສໍາຄັນເຊັ່ນກັນ.

ການທົດລອງທາງຄລີນິກສະແດງໃຫ້ເຫັນຫຍັງກ່ຽວກັບເມັດທຽບກັບການສັກຢາ

Randomized evidence suggests oral B12 at 1,000-2,000 micrograms daily can be as effective as intramuscular B12 for many people with deficiency. The evidence base is not enormous, and it contains fewer patients with severe neurological disease than clinicians would like.

The Cochrane review by Wang and colleagues found that high-dose oral B12 produced similar B12 blood-level responses to intramuscular treatment in the small randomized trials available (Wang et al., 2018). One study used 2,000 micrograms orally each day; another used 1,000 micrograms orally after an initial schedule, so “oral therapy” does not mean a low-dose supermarket product.

The earlier trial by Kuzminski et al. reported greater serum B12 concentrations with 2,000 micrograms oral cyanocobalamin than with a 1,000 microgram injection regimen, yet clinical outcomes were the question that mattered (Kuzminski et al., 1998). The evidence is honestly mixed on the ideal protocol because trials used different injection intervals and follow-up periods.

A tablet only works if it is taken. Missed daily doses can make an injection administered every 2-3 months more dependable in real life, especially for frail adults or people with complex medication schedules. Our ຄູ່ມືການຕີລາຄາການທົດສອບເລືອດ can help distinguish a true treatment change from a poorly timed retest.

ເມື່ອໃດທີ່ການສັກຢາວິຕາມິນ B12 ມີຄວາມຈຳເປັນທາງການແພດ

B12 injections are usually medically necessary when deficiency is severe, neurological symptoms are present, oral intake is impossible, or absorption and adherence cannot be relied upon. They are not automatically mandatory simply because pernicious anemia is suspected, provided high-dose oral treatment and follow-up are feasible.

Urgent clinician assessment is appropriate for new gait imbalance, progressive numbness, weakness, confusion, visual change, marked anemia, or pregnancy with significant deficiency. Neurological B12 injury can become partly irreversible; in that setting, I would not delay parenteral therapy while debating convenience.

NICE guideline NG239 advises intramuscular treatment when malabsorption is suspected or confirmed and recommends lifelong intramuscular replacement for autoimmune gastritis in many cases (NICE, 2024). Practice varies internationally: some clinicians use oral 1-2 mg daily in reliable patients with pernicious anemia, while others favour injections because the consequences of a lapse are higher.

A hemoglobin below 80 g/L, symptomatic breathlessness, tachycardia, or possible spinal-cord involvement warrants prompt medical review rather than self-treatment. To understand how anemia patterns appear on routine testing, see what a full blood count includes.

ປະລິມານການປິ່ນປົວການຂາດວິຕາມິນ B12 ທີ່ທ່ານໝໍໃຊ້ຕົວຈິງ

Common oral treatment doses are 1,000-2,000 micrograms daily, while common intramuscular regimens use 1,000 micrograms per dose with an initial loading phase. The product, national guideline and cause of deficiency determine the exact schedule.

In UK practice, hydroxocobalamin 1,000 micrograms intramuscularly is often given three times weekly for 2 weeks when there is no neurological involvement, then every 2-3 months for maintenance; protocols differ by local service. With neurological features, initial doses are often given every other day until no further improvement, then maintenance follows specialist advice.

A typical oral plan is cyanocobalamin 1,000 micrograms daily for 8-12 weeks, followed by 1,000 micrograms daily or a lower maintenance schedule if diet was the sole cause. Sublingual products are not proven to outperform swallowed tablets; once dissolved, most is swallowed anyway.

Do not improvise a loading regimen from social-media advice. The methylated B12 versus cyanocobalamin comparison explains why the dose and consistency generally matter more than marketing claims about the B12 form.

ວິທີການຕີຄວາມໝາຍຜົນການກວດວິຕາມິນ B12 ຕ່ຳຫຼືກ้ำກຶ່ງ

Serum B12 below 180 pg/mL (133 pmol/L) usually supports deficiency, while values from about 180-350 pg/mL are an indeterminate zone in which MMA or homocysteine can clarify cellular deficiency. Individual laboratory intervals differ, and a normal serum value does not fully exclude deficiency after recent supplementation.

Methylmalonic acid rises when B12-dependent metabolism is impaired, but reduced kidney function can raise MMA independently. Homocysteine may rise with B12 deficiency, folate deficiency, vitamin B6 deficiency, hypothyroidism and renal impairment, so neither confirmatory test should be read in isolation.

Macrocytosis is supportive but not required. A mean corpuscular volume above 100 fL raises suspicion for B12 or folate deficiency, alcohol exposure, liver disease, hypothyroidism, marrow disorders or medication effects; about one quarter of symptomatic B12-deficient patients may have a normal MCV.

Kantesti AI interprets B12 results by checking the ແບບຮູບ of MCV, RDW, hemoglobin, folate and historical values, including clues that a folate supplement may be masking macrocytosis. Our article on ການຕິດຕາມ MCV ສູງ covers the common alternatives.

ພະຍາດເລືອດຈາງຢ່າງຮຸນແຮງປ່ຽນແປງແຜນໄລຍະຍາວ, ບໍ່ແມ່ນສະເຫມີໄປເສັ້ນທາງ

Pernicious anemia is autoimmune loss of intrinsic-factor function, and it requires lifelong B12 replacement after diagnosis. Injections offer dependable delivery, but high-dose oral therapy may still maintain adequate status in selected, closely monitored adults.

The tests most often used are intrinsic-factor antibodies and parietal-cell antibodies, alongside B12, CBC and sometimes gastrin. A positive intrinsic-factor antibody is highly specific but not very sensitive, so a negative result does not rule the condition out; this is one of those areas where context matters more than a single antibody.

Pernicious anemia is more than an absorption problem. Autoimmune gastritis can coexist with iron deficiency before B12 deficiency becomes obvious, and long-standing disease carries gastric surveillance considerations that should be discussed with the treating clinician. Our pernicious anemia testing guide details the diagnostic sequence.

ແຄນເທສຕີ ເປັນ ແພລດຟອມການອ່ານຜົນກວດເລືອດຂອງ AI used across 127+ countries, but an AI interpretation cannot diagnose autoimmune gastritis or select a lifelong injection interval. A clinician needs to connect symptoms, antibodies, endoscopic history and the laboratory pattern.

ເປັນຫຍັງອາການທາງລະບົບປະສາດຈຶ່ງຮຽກຮ້ອງໃຫ້ມີການແກ້ໄຂທາງຄລີນິກທີ່ໄວຂຶ້ນ

Tingling, loss of vibration sense, unsteady walking, cognitive change or weakness with low B12 should trigger prompt in-person assessment and usually injectable treatment. Nerve recovery is less predictable than anemia recovery and may remain incomplete after months of deficiency.

The dorsal columns and peripheral nerves are vulnerable to B12 deficiency, producing a pattern clinicians call subacute combined degeneration in advanced cases. A normal hemoglobin does not protect against this; I have seen patients whose numb feet and abnormal vibration sense preceded any obvious anemia.

Improvement often starts within 1 week of effective therapy, but sensory symptoms can take 3-12 months and may not resolve completely. The safest approach is to record baseline function—walking distance, falls, hand dexterity, vibration sense—because a rising serum B12 alone is not a recovery score.

Neuropathy also has many mimics, including diabetes, alcohol-related nerve injury, thyroid disease, excess vitamin B6 and some medicines. Patients with tingling can use our vitamin B6 nerve-symptom guide to prepare better questions, but progressive weakness needs medical care now.

ເມື່ອໃດທີ່ເມັດພຽງພໍສຳລັບການຂາດວິຕາມິນ B12 ຈາກອາຫານ

Tablets are usually enough when low B12 results from inadequate intake and the gut can absorb supplements. Vegans, people eating very little animal-source food, and adults with temporary dietary restriction commonly respond well to oral cyanocobalamin 1,000 micrograms daily.

Vitamin B12 is naturally concentrated in animal-derived foods and fortified foods, so a strict vegan diet needs a reliable fortified-food or supplement strategy. Plant foods marketed as natural B12 sources are inconsistent; seaweed and fermented foods can contain inactive analogues that are not dependable treatment.

Dietary deficiency should still prompt a short history. A 23-year-old vegan with B12 of 142 pg/mL, normal MMA after treatment and no bowel symptoms is different from a 68-year-old with the same result, weight loss and iron deficiency. Age, medicines and gastrointestinal symptoms change the work-up.

For food planning, our water-soluble vitamin guide separates prevention doses from deficiency treatment. Do not assume nutrition alone will correct neurological symptoms quickly enough.

ຢາແລະສະພາບລໍາໄສ້ທີ່ປ່ຽນແປງການເລືອກການປິ່ນປົວວິຕາມິນ B12

Metformin, acid-suppressing medicines, coeliac disease, Crohn’s disease affecting the ileum, pancreatic insufficiency and gastric surgery can all reduce B12 availability. A tablet trial may be reasonable in some cases, but injections are often chosen when absorption is uncertain or symptoms are significant.

Metformin-associated B12 deficiency is common enough that regulators advise checking levels in patients with neuropathy, anemia or other risk factors, particularly at higher doses or with long duration. The mechanism likely involves calcium-dependent uptake of the B12-intrinsic factor complex in the ileum, not simply poor diet.

After sleeve gastrectomy or gastric bypass, treatment decisions should follow the bariatric team’s protocol because iron, folate, thiamine, vitamin D and copper may be affected together. Diarrhea, low albumin, unexplained weight loss or greasy stools should prompt investigation rather than endless supplement changes.

Low copper can also cause anemia and neurologic symptoms that resemble B12 deficiency, especially after bariatric surgery or excessive zinc. Our low copper clinical clues explain why checking only B12 can miss the real explanation.

ຈະກວດຄືນຫຼັງຈາກການປິ່ນປົວວິຕາມິນ B12 ໄວປານໃດ

A CBC and symptom review at about 4-8 weeks are generally more useful than repeating serum B12 immediately after an injection or tablet course. A very high B12 result soon after treatment mainly reflects the dose that was taken.

A reticulocyte response around day 3-5 offers an early clue that marrow production is recovering, while hemoglobin should rise over the following weeks if B12 deficiency was a key driver. Lack of improvement should reopen the differential: iron deficiency, ongoing blood loss, folate deficiency, inflammation, renal disease or an incorrect diagnosis.

For an uncomplicated dietary deficit, I often recheck CBC and B12 at 8-12 weeks, then confirm a sustainable maintenance plan. For neurological disease, autoimmune gastritis, pregnancy, renal impairment or multiple deficiencies, follow-up needs to be individualized and commonly begins earlier.

Kantesti’s ឧបករណ៍វិភាគតេស្តឈាមដែលដំណើរការដោយ AI can compare sequential B12, MCV, RDW and hemoglobin results rather than displaying each draw as a disconnected event. The ຄູ່ມືການປຽບທຽບຫ້ອງທົດລອງແບບຂ້າງຄຽງ shows what to record between tests.

ເປັນຫຍັງຜົນການກວດວິຕາມິນ B12 ສູງຫຼັງຈາກການປິ່ນປົວຈຶ່ງບໍ່ໜ້າໄວ້ວາງໃຈສະເຫມີໄປ

A high B12 level after an injection or high-dose tablet commonly reflects supplementation and does not prove that symptoms have another cause. Conversely, unexplained persistent B12 elevation without supplements deserves clinical review, especially when liver, kidney or blood-count abnormalities coexist.

Serum B12 can exceed a laboratory upper limit of roughly 900-1,000 pg/mL after treatment, depending on assay and timing. This is expected and usually not toxic; B12 has no established tolerable upper intake level in healthy adults because excess is largely excreted, although acneiform eruptions occur in a small minority.

The question I ask is simple: was the sample drawn after a supplement, injection, multivitamin, energy drink or fortified product? If not, elevated B12 can accompany liver disease, reduced renal clearance, inflammation or certain hematologic conditions, and it needs context rather than alarm.

ຂອງພວກເຮົາ high vitamin B12 guide explains the distinction between expected supplement-related elevation and an unexplained laboratory clue.

ຄວາມຜິດພາດທົ່ວໄປໃນການປິ່ນປົວວິຕາມິນ B12 ທີ່ເຮັດໃຫ້ການຟື້ນຕົວຊັກຊ້າ

The most consequential mistake is taking folic acid alone when B12 deficiency has not been excluded. Folic acid can normalize anemia while allowing B12-related nerve injury to progress, particularly when doses exceed the usual dietary range.

Do not use symptoms alone to decide between injections and tablets. Fatigue, brain fog and low mood are real but nonspecific; sleep loss, thyroid disease, iron deficiency, depression, diabetes and medication effects can produce similar complaints. A B12 result near 250 pg/mL warrants confirmation more often than an automatic injection.

Another mistake is delaying a test until after starting supplements when possible. Even 50-500 micrograms daily can shift serum B12 enough to complicate diagnosis, although urgent neurological symptoms should always be treated first. The high folate and hidden B12 issue is particularly relevant for people taking prenatal or energy supplements.

As of August 27, 2026, my advice as Dr. Thomas Klein is to choose the least burdensome route that is medically reliable, then verify recovery with symptoms and trends. Injection treatment is excellent medicine when indicated; it is not inherently stronger medicine for every low result.

ກອບການຕັດສິນໃຈທີ່ເປັນປະໂຫຍດສຳລັບການສັກຢາຫຼືເມັດວິຕາມິນ B12

Choose injections when risk is high or oral reliability is low; choose high-dose tablets when deficiency is mild-to-moderate, intake is the main issue and follow-up is dependable. The best route is the one that corrects deficiency without postponing investigation of its cause.

Tablets fit best when B12 is low from diet, there are no neurological signs, swallowing is safe and the person can take 1,000-2,000 micrograms daily consistently. Injections fit best with neurological findings, severe symptomatic anemia, vomiting, major malabsorption, post-operative anatomy or uncertain adherence.

Bring four things to the appointment: the original B12 result with units, a CBC, every supplement and medicine dose, and a symptom timeline. Dr. Thomas Klein’s clinical rule is that the cause should be named before maintenance is made indefinite whenever that can be done safely.

Kantesti AI គឺជាអ្វីមួយដែល ບໍລິການຕີຄວາມຜົນການກວດຂອງ AI designed to organize laboratory context for patients and clinicians, while final diagnosis and prescribing remain clinical decisions. Our ຄະນະທີ່ປຶກສາທາງການແພດ ແລະ វិធីសាស្ត្រធ្វើឲ្យមានសុពលភាពផ្នែកព្យាបាល (clinical validation) describe the medical oversight behind that boundary.

ຄໍາຖາມທີ່ຖາມເລື້ອຍໆ

ຢາສັກ B12 ໄດ້ຜົນໄວ ກວ່າຢາເມັດບໍ?

ການສັກຢາ B12 ຈະເພີ່ມລະດັບ B12 ໃນເລືອດໄດ້ໄວ ກວ່າການກິນເມັດ ເພາະວ່າປະລິມານ 1,000 micrograms ທີ່ສັກເຂົ້າກ້າມຈະຂ້າມການດູດຊຶມຂອງລຳໄສ້ ແລະ ສາມາດເພີ່ມລະດັບໃນການໄຫຼວຽນໄດ້ພາຍໃນສອງສາມຊົ່ວໂມງ. ການກິນ B12 ປະລິມານສູງ, ປົກກະຕິ 1,000-2,000 micrograms ຕໍ່ມື້, ຍັງສາມາດແກ້ໄຂການຂາດສານອາຫານໄດ້ຢ່າງມີປະສິດທິພາບພາຍໃນສອງສາມອາທິດໃນຜູ້ໃຫຍ່ຈຳນວນຫຼາຍ. ຈຸດໝາຍສຳຄັນທີ່ສຳຄັນແມ່ນການປັບປຸງອາການ, reticulocytes ພາຍໃນ 3-5 ວັນ ແລະ ການຟື້ນຕົວຂອງ CBC ພາຍໃນປະມານ 4-8 ອາທິດ, ບໍ່ແມ່ນພຽງແຕ່ລະດັບສູງສຸດໃນເລືອດໃນທັນທີ. ການສັກຢາແມ່ນເປັນທີ່ຕ້ອງການເມື່ອມີອາການທາງລະບົບປະສາດ, ໂລກເລືອດຈາງຮຸນແຮງ, ຫຼືການດູດຊຶມບໍ່ໜ້າເຊື່ອ.

ບີ 12 ທີ່ກິນທາງປາກ ໃຊ້ໄດ້ບໍ ຖ້າຂ້ອຍເປັນພະຍາດເລືອດຈາງ pernicious?

ຢາກິນວິຕາມີນ B12 ປະລິມານສູງສາມາດໄດ້ຜົນໃນບາງຄົນທີ່ເປັນພະຍາດເລືອດຈາງຈາກການຂາດວິຕາມີນ B12 (pernicious anemia) ເນື່ອງຈາກປະມານ 1% ຂອງປະລິມານຫຼາຍຖືກດູດຊຶມໂດຍການແຜ່ຊິມ (passive diffusion) ໂດຍບໍ່ມີສານພາຍໃນ (intrinsic factor). ດັ່ງນັ້ນ, ປະລິມານຢາກິນ 1,000-2,000 ໄມໂຄຣໂກຣມຕໍ່ມື້ອາດຈະໃຫ້ວິຕາມີນ B12 ທີ່ຖືກດູດຊຶມ 10-20 ໄມໂຄຣໂກຣມ, ເຊິ່ງເກີນຄວາມຕ້ອງການປະຈໍາວັນຂອງຜູ້ໃຫຍ່ 2.4 ໄມໂຄຣໂກຣມ. ຄໍາແນະນໍາຂອງ NICE ໂດຍທົ່ວໄປສະຫນັບສະຫນູນການປ່ຽນແທນໂດຍການສັກເຂົ້າກ້າມຕະຫຼອດຊີວິດສໍາລັບພະຍາດກະເພາະອາຫານທີ່ມີພູມຕ້ານທານຕົນເອງ (autoimmune gastritis), ໂດຍສະເພາະໃນກໍລະນີທີ່ຄວາມຫນ້າເຊື່ອຖືບໍ່ແນ່ນອນ. ວິທີການຄວນໄດ້ຮັບການເຫັນດີນໍາກັບແພດທີ່ຮັບຜິດຊອບການວິນິດໄສແລະຕິດຕາມຜົນກັບອາການແລະ CBC.

1 200 B12 1

ບໍ່ມີການປ່ຽນແປງຢາເມັດເປັນຢາສັກທີ່ແນ່ນອນເພາະວ່າຢາສັກເຮັດໃຫ້ມີການດູດຊຶມເຂົ້າສູ່ລະບົບເກືອບສົມບູນໃນຂະນະທີ່ການດູດຊຶມທາງປາກແມ່ນຂຶ້ນກັບປະລິມານແລະອີ່ມຕົວບາງສ່ວນ. ການສັກຢາ 1,000 microgram ແລະ 1,000-2,000 microgram ທາງປາກປະຈໍາວັນແມ່ນປະລິມານການປິ່ນປົວທົ່ວໄປ, ແຕ່ມັນບໍ່ສາມາດແລກປ່ຽນທາງเภสัชวิทยาໄດ້ໃນແຕ່ລະປະລິມານ. ປະມານ 1% ຂອງປະລິມານ 1,000 microgram ທາງປາກສາມາດເຂົ້າສູ່ຮ່າງກາຍໂດຍການແຜ່ diffusion, ໃນຂະນະທີ່ການດູດຊຶມເພີ່ມເຕີມເກີດຂຶ້ນຜ່ານ intrinsic factor ເມື່ອເສັ້ນທາງນັ້ນເຮັດວຽກ. ການຕອບສະຫນອງຕໍ່ການປິ່ນປົວແລະສາເຫດຂອງການຂາດແຄນຄວນນໍາພາການປ່ຽນແປງໃດໆ.

ໃຊ້ເວລາດົນປານໃດໃນການສັກຢາ B12 ເພື່ອໃຫ້ອາການເມື່ອຍລ້າດີຂຶ້ນ?

ການສັກຢາ B12 ອາດຈະເຮັດໃຫ້ພະລັງງານດີຂຶ້ນພາຍໃນສອງສາມມື້ຫາສອງສາມອາທິດເມື່ອການຂາດສານອາຫານແມ່ນສາເຫດທີ່ແທ້ຈິງຂອງຄວາມເມື່ອຍລ້າ, ແຕ່ໄລຍະເວລາແມ່ນແຕກຕ່າງກັນຢ່າງຫຼວງຫຼາຍ. ການຜະລິດ reticulocyte ມັກຈະເພີ່ມຂຶ້ນໃນວັນທີ 3-5, hemoglobin ໂດຍທົ່ວໄປເລີ່ມເພີ່ມຂຶ້ນຫຼັງຈາກ 1-2 ອາທິດ, ແລະການແກ້ໄຂ macrocytosis ຢ່າງສົມບູນອາດໃຊ້ເວລາເຖິງ 8 ອາທິດ. ອາການຊາ, ບັນຫາການດຸ່ນດ່ຽງ ແລະອາການທາງສະຕິປັນຍາມັກຈະໃຊ້ເວລາ 3-12 ເດືອນ ແລະອາດຈະບໍ່ຄົບຖ້ວນຖ້າການຂາດສານອາຫານດົນນານ. ຄວາມເມື່ອຍລ້າທີ່ເກີດຂຶ້ນຫຼັງຈາກ CBC ປົກກະຕິຄວນກະຕຸ້ນໃຫ້ກວດຫາການຂາດທາດເຫຼັກ, ພະຍາດຕ່ອມໄທລอยด์, ບັນຫາການນອນ ແລະສາເຫດອື່ນໆ.

ຂ້ອຍຄວນກິນຢາເມັດ B12 ກ່ອນການກວດເລືອດບໍ?

ຖ້າມີການວາງແຜນການກວດເພື່ອວິນิจໄສການຂາດວິຕາມິນ B12 ທີ່ບໍ່ມີຄໍາອະທິບາຍ ແລະທ່ານມີອາການຄົງທີ່, ໃຫ້ຫລີກລ້ຽງການເລີ່ມການເສີມຈົນກວ່າຈະໄດ້ເກັບຕົວຢ່າງເພາະແມ້ແຕ່ 50-500 micrograms ຕໍ່ມື້ກໍສາມາດປ່ຽນລະດັບວິຕາມິນ B12 ໃນເລືອດໄດ້. ບໍ່ມີໄລຍະເວລາລ້າງສານທີ່ເປັນສາກົນ, ເນື່ອງຈາກຫ້ອງທົດລອງແລະຂະໜາດການໃຊ້ແຕກຕ່າງກັນ, ສະນັ້ນຈົ່ງຖາມແພດຫຼືຫ້ອງທົດລອງກ່ຽວກັບຄໍາແນະນໍາການກະກຽມຂອງພວກເຂົາ. ຢ່າຊັກຊ້າການປິ່ນປົວເພື່ອໃຫ້ໄດ້ພື້ນຖານທີ່ສົມບູນແບບຖ້າທ່ານມີອາການທາງລະບົບປະສາດ, ໂລກເລືອດຈາງຢ່າງຮຸນແຮງ, ຄວາມກັງວົນກ່ຽວກັບການຖືພາ, ຫຼືການຊຸດໂຊມທາງຄລີນິກຢ່າງມີນัยສຳຄັນ. ຈົ່ງບັນທຶກຂະໜາດການໃຊ້ແລະວັນທີເລີ່ມຕົ້ນເພື່ອໃຫ້ໄດ້ຜົນການຕີຄວາມໝາຍທີ່ຖືກຕ້ອງ.

ລະດັບ B12 200 pg/mL ຕ່ຳພໍທີ່ຈະສັກຢາໄດ້ບໍ?

ລະດັບ B12 200 pg/mL ຖືວ່າຕ່ຳກວ່າປົກກະຕິ ແລະ ບໍ່ໄດ້ຕັດສິນດ້ວຍຕົວມັນເອງວ່າຕ້ອງສັກຢາຫຼືບໍ່. ຫ້ອງທົດລອງຫຼາຍແຫ່ງຖືວ່າຄ່າຕ່ຳກວ່າ 180 pg/mL ແມ່ນຂາດແຄນຢ່າງຊັດເຈນ, ໃນຂະນະທີ່ຄ່າປະມານ 180-350 pg/mL ອາດຈະຕ້ອງການອາຊິດ methylmalonic, homocysteine, ຜົນການວິເຄາະເລືອດ CBC ແລະການທົບທວນອາການ. ການສັກຢາແມ່ນມີເຫດຜົນຢູ່ທີ່ 200 pg/mL ເມື່ອມີອາການທາງປະສາດ, ໂລກເລືອດຈາງ, ການດູດຊຶມບໍ່ດີ, ການຖືພາຫຼືບໍ່ສາມາດກິນຢາທາງປາກໄດ້. ຄົນທີ່ມີຄວາມສ່ຽວດ້ານອາຫານທີ່ໝັ້ນຄົງ ແລະບໍ່ມີອາການທາງປະສາດອາດຈະຕອບສະໜອງໄດ້ດີຕໍ່ການກິນຢາທາງປາກ B12 1,000-2,000 micrograms ຕໍ່ມື້ ພ້ອມກັບການຕິດຕາມຜົນຕາມແຜນ.

ການສັກຢາວິຕອາມິນ B12 ທຽບກັບຢາເມັດ: ອັນໃດເພີ່ມລະດັບໄດ້ໄວກວ່າກັນ?

ທອມັສ ໄຄລນ໌, MD

ຊາຣາ ມິດເຊວ, MD, PhD

ສາດສະດາຈານ ດຣ. ຮານສ໌ ເວເບີ, ປະລິນຍາເອກ