First of all, as we all know, selenium is an essential trace element for the human body and a component of various enzymes in the human body. It plays a role in resisting diseases, delaying aging, and enhancing immune function in life. Selenium has many biological effects such as liver protection, anti-cancer, cardiovascular protection, regulating hormone secretion, antagonizing heavy metals, assisting with radiotherapy and chemotherapy, treating cataracts, scavenging excess free radicals, etc. Selenium products occupy an important position in health foods and pharmaceuticals. The earliest selenium supplements used by people were inorganic selenium (mainly sodium selenate and sodium selenite). The action dose and toxic dose of inorganic selenium are relatively close, and the safety and biological activity are low. Now it has been basically replaced by nano-selenium with high biological activity and non-toxicity.

Chemically speaking, nano-selenium is a kind of reduced selenium, which is equivalent to zero-valent selenium. Zero-valent selenium does not have any physiological function and will not be absorbed and utilized after entering the human body. It will be discharged intact. However, nano-selenium is a new type of product prepared using nanotechnology. It can not only be absorbed and utilized by the human body, but also exert unique functions of organic and inorganic selenium, such as antioxidant and immune regulation. The most important thing is that it has low toxicity that inorganic selenium and organic selenium do not have. It is a relatively safe selenium product and is also a product brought by nanotechnology.

Acute toxicity and bioavailability of nano-red element selenium, Health Research Issue 1, Volume 29, 2000 Author: Zhang Jinsong (inventor of nano-selenium): Acute toxicity experiments confirmed based on the amount of oral selenium , the LD50 of nano red element selenium = 112.98 (89.95 ~ 141.90) mg/kg, the LD50 of sodium selenite = 15.72 (13.38 ~ 18.47) mg/kg; safety test study of selenium-rich yeast, "Animal Husbandry and Veterinary Medicine" 2006 Issue 09, Yu Yingjie et al.:: The oral LD50 of mice is 26·38g/kg. It is known from experimental data that the smaller the content, the higher the toxicity. The higher the content, the lower the toxicity. Obviously, in terms of safety: nano-selenium > organic selenium (selenium-rich yeast) > inorganic selenium (selenium sulfite). Nano selenium is unique in the world.

Sewang Capsule is only a health product and cannot replace medicines. In addition, Selenium Capsule obtained the Health Food Approval No. 134 from the Ministry of Health in 1998; it obtained the National New Product Certificate in 1998; it was rated as a high-tech achievement transformation project in Shanghai in 2002; the trademarks "Sewang" and "NANO-Se" are in It has been registered in many countries in Asia, North America, and the European Union, and has been notified by the US FDA.