Long-term use of beta carotene
helps prevent mental decline, such as dementia.
, for example, seemed very promising in the laboratory, says Gilbert S.
Numerous animal studies have suggested that beta carotene
can defend against tumors and enhance the immune system.
is no magic bullet-far from it," says Klausner.
The color comes from a gene not associated with beta carotene
Allgood says such results cast doubt on the entire lot of carotenoids, not just beta carotene
. According to Procter & Gamble, "it is not possible to conclude that a reduction in serum carotenoid concentration will present a public health concern."
The new study represents the first long-term comparison of 13-cis-retinoic acid and beta carotene
. The researchers found that premalignant changes progressed in just two of 24 patients (8 percent) assigned to 13-cis-retinoic acid.
The researchers took blood samples from all participants and analyzed the clear, plasma portion for carotene (primarily beta carotene
) and vitamins E and C.
Gaziano presented preliminary evidence of beta carotene
's vessel-protecting prowess in Dallas this week at the American Heart Association's 63rd Scientific Sessions.
minimum daily requirement for the potentially toxic vitamin is 5,000 IU.) A smaller percentage of other betel chewers showed remission with a combination treatment of vitamin A and beta carotene
, or beta carotene
Arshad et al., "Comparative study of beta carotene
determination by various methods: a review," Bio Bulletin, vol.
To measure the oxidative stress different parameters like mRNA level of Bcl-2, caspase-3 activity in MDCK cells after beta carotene
or beta carotene+AFB1 treatment were checked.