You may have heard that vitamin D helps with bone health, but did you know that vitamin D is actually the "commander-in-chief" of the immune system ? A deficiency can not only cause chronic inflammation but may also increase the risk of autoimmune diseases, cancer, and viral infections. Dr. Eric Berg shared his experience 11 years ago when his vitamin D level was only 21.1 , leading to back pain, neck pain, and arthritis—all due to vitamin D deficiency !
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🧬The relationship between Vitamin D and the immune system
· Vitamin D is involved in the regulation of about 10% of the genes in the human body (about 2,500 genes ).
· Helps T cells distinguish between "self" and "non-self," preventing autoimmune diseases .
· Vitamin D deficiency increases the risk of viral infections, tumors, and chronic inflammation.
· Studies show that cancer patients generally have low levels of vitamin D.
⚠️ Blood tests do not equate to intracellular effectiveness
· The vitamin D detected in the blood was in the "inactive form ".
· The active form of vitamin D within cells is what truly plays a role.
· Some people may have "vitamin D resistance " in their cells even if their blood concentration is normal.
🧠Causes of Vitamin D Resistance
· Genetic defects (such as active inflammatory genes )
· Infections (such as Lyme disease) can inhibit vitamin D receptors .
· Deficiency in magnesium, zinc, and vitamin K2 → vitamin D cannot function properly.
· High stress, high cortisol, obesity, diabetes → reduce vitamin D effectiveness
· Darker skin tone → lower ability to synthesize vitamin D from sunlight
📏The recommended dose is much higher than the official RDA .
· Official recommendation: 600 IU per day (far from sufficient )
· Dr. Berg recommends: 8,000–10,000 IU daily.
· Studies have indicated that the optimal dose should be 8,895 IU daily.
· High doses (such as 50,000 IU ) have been used to treat autoimmune diseases, glaucoma, and other conditions .
· In 1940 , a case involved the use of 1,000,000 IU to treat rickets.
🧪Safety and Risks of High-Dose Vitamin D
· The real risk comes from "excessive calcium intake," not vitamin D itself.
· Solution :
o Avoid taking calcium supplements , but you can get calcium from your normal diet (such as cheese and dairy products ).
o Supplementing with magnesium helps regulate calcium levels.
o Drink more than 2.5 liters of water daily to prevent kidney stones .
o Regular blood tests : Check blood calcium and parathyroid hormone ( PTH ) levels.
👶Recommended dosage for different ages
| Age/Status | Recommended daily intake |
| Infants under one year old | 1,000 IU |
| Breastfeeding mothers | 8,000–10,000 IU |
| Children over one year old | 3,000 IU |
| From teenagers to adults | 8,000–10,000 IU |
| sunbathing | Reduce the amount of supplementation |
According to a report from the Institute of Medicine , 10,000 IU per day is a safe dose with no toxic risks .
🧾Conclusion: Vitamin D is not only for bone health, but also a core component of the immune system.
Hong Kong residents often work indoors for long periods, experience insufficient sunlight, and face high stress levels, making vitamin D deficiency potentially more prevalent and dangerous than you might imagine . Starting today, a vitamin D capsule, a glass of electrolyte water, and a spoonful of cheese will help build a strong foundation for your immune system !
Don't wait until you get sick to try to fix things; prevention is the key to true health! 💪☀️🧬
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👉🏻： https://iherb.prf.hn/l/gx9bmz3/
High quality doesn't have to be expensive! Over a hundred iHerb products are up to 25% off compared to other stores, and with lightning-fast 8-hour delivery!
YouTube source: https://www.youtube.com/watch?v=TV0JzyNRvE4
YouTube Column: Dr. Berger in Chinese Health knowledge
