The Role of B Vitamins in Energy and Immune Support
Helping you understand “why you always feel drained during treatment” — and gentle ways to improve
During cancer treatment — chemotherapy, radiotherapy, or targeted therapy — the body consumes large amounts of energy and nutrients, leaving patients frequently feeling “no matter how much I sleep, I’m still exhausted”, “always low on energy”, and “my immunity is weak”.
The B vitamins (including B1, B2, B3, B5, B6, B7, B9, B12) are core co-factors in energy metabolism and the immune system.
They participate in the conversion of carbohydrates, fats, and proteins; mitochondrial energy production; nerve conduction; and red blood cell formation.
Deficiency directly exacerbates fatigue, brain fog, anaemia, and immune suppression, reducing treatment tolerance.
Prevalence of B vitamin deficiency in cancer patients
Treatment accelerates B vitamin depletion for several reasons:
- Chemotherapy drugs directly damage intestinal mucosa, impairing B vitamin absorption (especially B12 and folate)
- Tumour hypermetabolism and chronic inflammation consume large amounts of B vitamins as coenzymes
- Treatment-induced loss of appetite and vomiting severely limit dietary intake
- Prolonged stress and hormonal imbalance speed up B vitamin metabolism and loss
- Hong Kong dietary habits include relatively few B vitamin-rich foods (whole grains, lean meat, leafy greens), making deficiency more common
Specific impacts of B vitamin deficiency
B vitamin deficiency affects patients on multiple levels — energy, nerves, and immunity — with common manifestations including:
- Extreme fatigue and brain fog: slowed energy metabolism makes patients prone to sudden “power outages”
- Neurological issues: numbness/tingling in hands and feet, stabbing pain, memory decline, and low mood
- Anaemia and reduced oxygen delivery: impaired red blood cell production worsens fatigue and weakness
- Reduced immunity: decreased T-cell and NK-cell activity increases infection risk
- Oral and intestinal mucosal damage: more severe mouth ulcers, diarrhoea, or constipation
How B vitamins support patients in the cancer supportive phase
B vitamin supplementation provides multi-level support, helping treatment proceed more smoothly:
- Promotes energy metabolism: acts as mitochondrial coenzymes to convert food into ATP, boosting stamina and tolerance
- Supports the nervous system: maintains nerve conduction and myelin integrity, reducing neurotoxicity and brain fog
- Improves anaemia and oxygen delivery: facilitates red blood cell production for better tissue oxygenation
- Regulates immune balance: supports T-cell and NK-cell activity to better combat infections
- Relieves oral and intestinal mucosal damage: reduces treatment-induced ulcers and absorption issues
Advantages of IMI B vitamin injection therapy in supportive care
Oral B vitamins have limited absorption, especially in patients with intestinal damage.
IMI B vitamin injection therapy (intramuscular) raises blood levels quickly and safely, with key advantages:
- Near-100% absorption, bypassing intestinal absorption barriers
- Long-lasting effect: a single injection maintains stable levels for weeks
- Precise dose control: physician adjusts based on blood test results to avoid excess
- Ideal for patients during treatment or with poor absorption
Important considerations for IMI B vitamin injection therapy
IMI B vitamin injection therapy is a professional medical procedure — **it must never be self-purchased or used at home**. It can only be administered in a medical facility after evaluation by a qualified physician.
The physician will individually adjust dosage and frequency based on your latest B vitamin levels, anaemia markers, and treatment stage.
Full monitoring is conducted before and after each session to ensure complete safety and comfort.
Every detail is guided by the principle of “making you feel as comfortable as possible” and coordinated with your primary treatment plan.
Summary
B vitamins in the cancer supportive phase are not optional supplements —
they are essential support for “restoring energy, protecting nerves, and bolstering immunity”.
When B vitamin levels return to normal, fatigue eases, brain fog clears, tolerance improves,
allowing you to complete your treatment course with more strength and a faster return to normal quality of life.
If you are currently troubled by fatigue, brain fog, anaemia, or reduced immunity during treatment,
please feel welcome to contact us at any time.
Our medical team will review your treatment stage and latest blood results, and your specialist physician will assess the most suitable supportive options for you, including IMI B vitamin injection therapy, helping you gently regain energy and clarity.
You deserve abundant energy and the gentlest care while fighting cancer.
Disclaimer：
The information provided in this article is for educational and informational purposes only. It is not intended to diagnose, treat, cure, or prevent any disease, nor should it replace professional medical advice. Readers are encouraged to consult with a qualified healthcare provider or integrative oncology specialist before making any changes to their diet, treatment plan, or lifestyle based on the content herein. Therapies and tests mentioned, including immune or integrative treatments, should always be…
All product names, test references, and therapy mentions are for informational context only and do not constitute endorsement. Results and experiences may vary among individuals.