Does beta carotene fight cancer?

Maybe. Please forgive this senior physician's frankness. The data on carotenes and lycopenes is so massive, so contradictory, is so tied up with the politics of "healthy diet", and makes so little sense scientifically that your question cannot be answered. In science, the stuff that's really true is generally established quickly. I love eating carrots, but would not spend money supplementing carotene.
Antioxidant power? Beta carotene has been touted as an anti cancer agent for its antioxidant properties. However, in a large prospective cancer prevention trial using it as a supplement in smokers, the incidence of lung cancer was higher in people taking beta carotene. Beware of unsubstantiated claims of certain food supplements since they could cause more harm than good!

Related Questions

Does beta carotene help fight cancer?

Apparently not. According to studies, it seems that high doses of these supplements are associated with lung cancer in smokers. Supplements may increaese the risk of prostate cancer. Its main benefit is in being converted to retinol or vitamin a which prevents night blindness. Read more...
We don't know. Studies using beta carotene to prevent lung cancer in high-risk patients have been unsuccessful. Chemoprevention of malignancies remains an area of active investigation. Read more...

Is it true vitamin A & E suppl. Increase the risk of cancer! I read on internet smokers used beta-carotene were 18% more likely to get lung cancer!

Possibly. It is true that these supplements do not help to prevent cancer and may increase risk of some cancers. Your doctor may still feel you need them for certain problems, but you should not take them as a cancer preventative. Read more...

Are beta-carotene supplement dangerous?

Possibly in smokers. Some studies have found high doses of beta carotene in smokers increases lung cancer risk, yet other studies have found it doesn't increase risk. Antioxidants work as a team & the studies showing increased risk gave beta carotene without other antioxidants to balance it. See http://tinyurl.com/p34vo4b It's wiser to take mixed carotenoids & get through diet. If you smoke use caution-better to quit! Read more...

How much more beta carotene would I get in pulped carrots compared to a shop bought bottle of carrot juice?

Not more. As best as I can tell, carrot juice may have more nutrients than the pulp, but both the juice and the pulp contain high levels of beta carotene and other nutrients. See http://healthyeating.sfgate.com/better-drink-carrot-juice-eat-whole-carrots-7430.html. Read more...

Can I take food which contains provitamin-a/ beta-carotene when I am on accutane? Does it cause side effects?

Yes. You don't need to avoid foods containing vitamin a or carotenoids, but you should avoid vitamin a supplements when taking isotretinoin, as any potential toxic effect of vitamin a may be enhanced. This may result in joint and muscle aches, dry skin, abdominal pain, and some effects on the liver. Read more...