TCP invites you to learn about “Vitamin D” from a perspective you (probably) never knew

23 December 2022
  1. Most Thais lack Vitamin D

In the past, Vitamin D was often perceived as requiring no additional intake because it could be easily synthesized by the body in countries with hot climates, like Thailand, with exposure to sunlight. In fact, data published by Bumrungrad Hospital shows that people residing in Bangkok have lower levels of Vitamin D than in other regions[1] and that more than 60% of those living in Bangkok are deficient. Moreover, nearly 50 percent of people in cities in each province have more Vitamin D deficiency than those living in rural areas.

  1. Sun exposure alone may not generate adequate Vitamin D intake

People have changed their behaviors today, preferring to stay in air-conditioned rooms or buildings for long periods and often avoiding exposure to sunlight, especially during the winter, when there is less sunlight as well as during the COVID-19 pandemic with the need to maintain social distancing. It is less popular to join groups for outdoor activities as usual which further reduces the opportunity to receive Vitamin D.

  1. Vitamin D is important for the immune system

Research from Frontiers in Nutrition, a famous academic journal publishing platform, shows that Vitamin D helps maintain normal functioning of the immune system. This is because white blood cells, which help eliminate foreign substances entering the body, are activated to work more when combined with Vitamin D.[2]

  1. Vitamin D works even better when combined with Vitamin C and zinc

Additional research from Frontiers in Nutrition also shows that Vitamin D, when working together with Vitamin C and zinc, contributes to proteins that help strengthen the connection of cells reducing the chance for germs to enter the body. People who do not receive enough of these nutrients may be affected by cell membrane deterioration which enables germs to easily attack the body.

  1. How to add Vitamin D to the body more easily than through sun exposure
    While Vitamin D is found in salmon, tuna, and shiitake mushrooms, these foods do not provide adequate levels to meet your daily needs. Taking Vitamin D supplements with your regular diet is, therefore, an alternative to improved health. Look for functional drinks that contain Vitamin D like “Hi! X DHC Vitamin D, C and Zinc,” which combines three premium quality vitamins from DHC, the number one best-selling food supplement brand in Japan, and is mixed with real fruit juices in tasty and refreshing flavors providing a convenient and suitable choice for your daily Vitamin D intake.


[1] Bumrungrad Hospital (2019). There are more benefits of vitamin D than you know!. Retrieved November 18, 2022, from

[2] Name J.J., Souza A.C.R., Vasconcelos A.R., Prado P.S., Pereira C.P.M. Zinc, Vitamin D and Vitamin C: Perspectives for COVID-19 With a Focus on Physical Tissue Barrier Integrity. Frontiers in Nutrition (2020), 7, art. no. 606398

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