Dear Pratyesh,
As we know trace amounts of lead, mercury or arsenic will leads to svere toxicities, how these products are in market even though they contain them? Pity thing!
eswar :-)

Dear Pratyesh, I think some time back you wrote a blog which supported the Ayurvedic medicines and now you are presenting the contradictory side.
Do you know that when medicines are prepared by proper methods they have no free mercury, lead or arsenic? It is not due to the medicines but the formulators, the companies & manufacturers involved in manufacture of these medicines that cause these problems.
I must ask all those who think in this manner that, please do not go by the standards given now but look into the methods mentioned in ancient literature, it is a pity that people who do not know how a medicine by proper methods are preparing the medicines & causing the problems to the system.
The other fact is that the companies are suffering huge losses as people are shifting from regular medicine to treatments like Ayurveda, Homeo, Unani etc. If some results come out which can lead to cause doubts about these medicine systems then people will definitely return back to the allopathic system. So there is more of a counter attack on the ayurvedic system.
The companies in India face scarcity of people knowing complete knowledge & know how of formulating & manufacturing the medicines in the way they should be, how is it going to be that people in US know all of them and prepare the medicines accordingly?
If the researchers go & find the roots of problem it will be more helpful & also the companies must stop producing sub standard medicine or medicine that are prepared by wrong methods.
I feel instead of GMP the medicines must be prepared by RMP, PMP, AMP i.e. Reported Manufacturing Practices, Proper Manufacturing Practices & Ayurvedic Manufacturing Practices respectively.
I hope that at least the people who believe in the system of medicine will support my view.

Dear Pratyesh,
I feel it is a some kind of conspiracy against the Indian system of medicine, which is gaining prominence now a days.
If such studies are published in so called "reputed" journals, people would be wary of buying this products that are being sold across the globe. If ayurvdic products start greater market acceptance, how would pharma companies survive?
Big multinational companies have these "ghost writers" who clandestinely denigerate the competitors.
The ayurvedic system is existing since centuries and it is well tested. Perhaps, ayurvedic system is the only system that tries to identify the imbalance in the human body and try to balance it. Canada banned some of these products sometimes back. The plausible reasons are not with the product but with the manufacturers, as rightly mentioned by lakshya. In order to mint money, the manufacturers are bringing disrespect to the oldest system of medicine known to the world.
Don't judge studies subjectively, not all studies published in "reputed" journals are unbiased.