We explored a novel oral delivery system using vitamin B12, fucoidan, and concanavalin A to enhance insulin effectiveness for diabetes management. This smart nanosystem targets inflammation while regulating blood glucose levels efficiently. Our findings indicated that when tested on type I diabetic mice, the nanosystem significantly lowered blood sugar and reduced inflammatory markers, such as TNF-α and interleukin-6. Notably, the system ensures safe and effective delivery, presenting a promising alternative to traditional insulin methods.

Essential for diabetes

Most Useful Review

Excellent! This vitamin is essential for individuals with insulin resistance and type 2 diabetes. Hypoglycaemic medications deplete B12 stores, making supplementation crucial. It should be taken in courses for optimal effect.

Updated: Mar 2026

We conducted a case-control study to investigate the link between vitamin B12 serum levels and migraine, which affects so many people but lacks a fully understood cause. Our research included 90 individuals experiencing migraines—split into those with chronic migraines and those with episodic migraines—matched against 90 healthy participants.

We measured vitamin B12 serum levels using a reliable testing method and explored how these levels correlated with migraine intensity, as assessed by two measuring scales. Notably, we found that migraine sufferers had significantly lower levels of vitamin B12 compared to those without migraines.

Chronic migraine patients specifically had even lower vitamin B12 levels than their episodic counterparts. Additionally, there was a noteworthy negative correlation; as vitamin B12 levels decreased, the severity of migraine attacks increased. These findings suggest that vitamin B12 deficiency may have an important relationship with migraine experiences, emphasizing the need for further studies to explore this connection in detail.

Relief from Headache

Most Useful Review

6 people found this helpful

Doctors often prescribe Vitamin B12 for headaches stemming from stiff shoulders and necks. I experienced this stiffness, alongside a headache, and Vitamin B12 (methicobal) was recommended. This vitamin aids in synthesising haemoglobin, which is essential for carrying oxygen in the blood, repairing peripheral nerves, and alleviating pain and numbness. A deficiency may lead to poor concentration, anaemia, and eye strain. Despite spending long hours at my desk, painkillers often failed me, but Vitamin B12 has been beneficial. I find iHerb's price is more affordable than prescriptions, and I keep it handy. The taste is mild, reminiscent of strawberries or grapes, and it is small enough to consume easily with water.

Updated: Apr 2026

Depression details

SCIENTIFIC SCORE

Questionable

Based on 21 Researches

Vitamin B affects depression risk

Laird EJ, O'Halloran AM, Molloy AM, Healy M, Hernandez B, et al. Low vitamin B but not folate is associated with incident depressive symptoms in community-dwelling older adults: a 4-year longitudinal study. Br J Nutr. 2023;130:268. doi:10.1017/S0007114521004748

We explored the connection between vitamin B levels and depression in older adults over four years. Our study followed nearly 3,850 participants and found that those with low blood levels of vitamin B were significantly more likely to report depressive symptoms. Specifically, individuals with low vitamin B had a 51% higher chance of developing depression compared to those with adequate levels.

However, we did not find any significant link between folate levels and depression. These insights suggest that boosting vitamin B might be a simple, cost-effective way to help improve mental health in older adults.

Decreased fatigue

Most Useful Review

I felt quite fatigued and depressed until I started taking this supplement; now, I feel much better. I’ve read that EA is beneficial but ensure to buy only from I Herb, not other retailers.

Updated: Mar 2026

Heart Disease details

SCIENTIFIC SCORE

Questionable

Based on 10 Researches

B12 may help heart damage

Qin Y, Shi Y, Yu Q, Yang S, Wang Y, et al. Vitamin B12 alleviates myocardial ischemia/reperfusion injury via the SIRT3/AMPK signaling pathway. Biomed Pharmacother. 2023;163:114761. doi:10.1016/j.biopha.2023.114761

We explored the potential of high doses of vitamin B12 to protect against heart damage caused by ischemia/reperfusion injury. By researching mice subjected to heart injury, we found that vitamin B12 showed promising effects in reducing oxidative stress and improving heart function.

Our findings suggest that this vitamin works through specific pathways that lessen inflammation and cell death in heart tissue. However, more studies are needed to fully understand its therapeutic value in treating heart disease.

7.5

Strengthened nerves

Most Useful Review

I noticed its effects in the gym; my nutritionist suggested taking it in liquid form for quicker absorption. It strengthens my nerves, reduces exercise-induced tremors, and energises my body.

Updated: Mar 2026

Leg Cramps details

1 people found this helpful

I received the Vitamin B12 product quite swiftly. I'm pleased with the flavour and its benefits; I no longer suffer from cramps at night!

Updated: Apr 2025

Mild Cognitive Impairment details

Improved mother's condition

Most Useful Review

5 people found this helpful

Vital! Few people know that a lack of vitamin B12 can lead to dire consequences such as dementia and even paralysis. After watching a programme about a young model who lost her legs due to dieting, I became interested in this issue. My mother takes metformin, which has B12 deficiency as a side effect. We neglected this for two years until I decided to give her B12. Unfortunately, it disappeared from Russian pharmacies, but I found it on iHerb. After two weeks, she became more active and alert, no longer napping during the day. Her skin has improved, and she is recalling memories and experiencing enhanced hearing. We are very pleased. Be sure to check on your elderly relatives for potential deficiencies!

Updated: Mar 2026

Tinnitus details

SCIENTIFIC SCORE

Questionable

Based on 7 Researches

No significant benefit from B12

Dadgarnia M, Mandegari M, Zand V, Vaziribozorg S, Zare-Zardini H, et al. The effect of vitamin B12 on idiopathic tinnitus. Am J Otolaryngol. 2024;45:104028. doi:10.1016/j.amjoto.2023.104028

We conducted a double-blind clinical trial with 140 patients suffering from idiopathic tinnitus to gauge the effectiveness of vitamin B12. Participants were divided into two groups, one receiving vitamin B12 and the other a placebo over a month.

We evaluated tinnitus severity through questionnaires at multiple intervals. However, our findings revealed that vitamin B12 did not significantly reduce tinnitus severity compared to the placebo.

Ultimately, our study suggests that vitamin B12 may not be a beneficial treatment for tinnitus, as the results showed no noteworthy improvements.

Effective for husband

Most Useful Review

1 people found this helpful

I purchased this for my husband's tinnitus. After consuming half the bottle, the ringing in his ears seemed to have diminished. Results may vary, but it appears to have worked for him.

Updated: Mar 2026

Autoimmune Disorder details

SCIENTIFIC SCORE

Possibly Effective

Based on 15 Researches

Pernicious anemia diagnosis and treatment

Mswelo VE, David MM, Banturaki A, Munyambalu DK, Hassan HA, et al. Rural health challenges in Western Uganda: pernicious anemia masquerading as recurrent lower limb weakness-a case report. J Med Case Rep. 2025;19:60. doi:10.1186/s13256-025-05095-4

We examined a case of a 51-year-old Ugandan man who experienced recurring lower limb weakness linked to pernicious anemia, an autoimmune condition causing vitamin B12 deficiency. After initial treatments, his symptoms reappeared, leading to further testing that confirmed the diagnosis.

Treatment with vitamin B12 injections significantly improved his condition. This case emphasizes the need for healthcare providers to recognize the signs of vitamin B12 deficiency early, particularly in resource-limited settings, to ensure timely diagnosis and treatment.

Cognitive improvement

Most Useful Review

10 people found this helpful

After my mother, in her 90s, took this for her numbness, she reported feeling much better, with no numbness now. The taste is pleasant, making it easy for the elderly to take, and it has been effective for her cognitive health.

Updated: Mar 2026

Flu details

Excellent! This is beneficial for memory, blood fluidity, and general weakness. It helps delay ageing and strengthens memory, useful for sleep and nerves.

Updated: Apr 2025

Anemia details

SCIENTIFIC SCORE

Moderately Effective

Based on 21 Researches

Effectiveness of B12 in IGS

Di Sario F, Piloni F, Gasparini F, Serpetti E, Bruschi B, et al. Severe pancytopenia at the presentation of Imerslund-Gräsbeck syndrome in a 23-month-old Italian boy. Ital J Pediatr. 2024;50:186. doi:10.1186/s13052-024-01759-x

We explored the case of a 23-month-old boy suffering from severe pancytopenia linked to Imerslund-Gräsbeck syndrome, a rare condition caused by an inability to absorb vitamin B12. Upon diagnosis, the boy received vitamin B12 replacement therapy, which effectively addressed his symptoms and improved his health.

This case highlights the significance of early detection and treatment of IGS to avoid potential neurological damage. It's crucial to recognize this condition, even when neurological symptoms are absent, to provide timely care.

7.5

Improved vitamin levels

Most Useful Review

120 people found this helpful

I had very low vitamin B-12, around 150 units, which caused me to feel unwell and showed signs of anemia. After taking this supplement, I raised my B-12 to 275 units. I appreciate that methylcobalamin is noted as a more natural form. This product has been very helpful for me.

Updated: Mar 2026

Chronic Fatigue Syndrome details

SCIENTIFIC SCORE

Questionable

Based on 7 Researches

Vitamin B12 ineffective for CFS

Wiebe E. N of 1 trials. Managing patients with chronic fatigue syndrome: two case reports. Can Fam Physician. 1996;42:2214.

We explored the effectiveness of high-dose vitamin B12 injections on chronic fatigue syndrome (CFS) through two case reports that utilized N of 1 trials. This approach allowed us to make tailored treatment decisions based on individual responses to the therapy.

In one case, we found that high-dose vitamin B12 injections did not yield positive results, leaving the patient without significant relief from their symptoms. Conversely, in another case, we observed that nimodipine proved to be a very effective treatment for that patient’s chronic fatigue.

These findings suggest that while vitamin B12 may not be helpful for everyone suffering from CFS, other treatments like nimodipine can be beneficial. Thus, personalized treatment strategies are key in managing this complex and varied condition.