吃唯他命會致癌 不是開玩笑的
包括唯他命A D E和beta 胡蘿蔔素都會致癌

http://www.cancer.org/treatment/tre...d-beta-carotene
美國癌症協會
Clinical trials have found that vitamin A supplements do not lower the risk for lung cancer in smokers and actually increased their risk for dying of lung cancer and heart disease. Studies of overall health and longevity found no benefit to taking vitamin A supplements, and the US Institute of Medicine does not recommend use of these supplements by the general public. Studies on vitamin A and other types of cancer have been mixed. There have been no consistent findings showing a lower risk of cancers of the stomach, intestines, skin, breast, cervix, bladder, or prostate due to vitamin A in the diet.



國家癌症機構
http://www.cancer.gov/cancertopics/...on/antioxidants

A 1994 cancer prevention study entitled the Alpha-Tocopherol (vitamin E)/ Beta-Carotene Cancer Prevention Study (ATBC) demonstrated that lung cancer rates of Finnish male smokers increased significantly with beta-carotene and were not affected by vitamin E (2).

Another 1994 study, the Beta-Carotene and Retinol (vitamin A) Efficacy Trial (CARET), also demonstrated a possible increase in lung cancer associated with antioxidants (3).

The 1996 Physicians’ Health Study I (PHS) found no change in cancer rates associated with beta-carotene and aspirin taken by U.S. male physicians (4).

The 1999 Women's Health Study (WHS) tested effects of vitamin E and beta-carotene in the prevention of cancer and cardiovascular disease among women age 45 years or older. Among apparently healthy women, there was no benefit or harm from beta-carotene supplementation. Investigation of the effect of vitamin E is ongoing (5).


科學日報
http://www.sciencedaily.com/release...80229075222.htm

Certain Vitamin Supplements May Increase Lung Cancer Risk, Especially In Smokers

ScienceDaily (Mar. 3, 2008) — Vitamin supplements do not protect against lung cancer, according to a study of more than 77,000 vitamin users. In fact, some supplements may even increase the risk of developing it.