However, , they added this effect has not yet been demonstrated in carefully-controlled clinical trials.

但是，目前这项研究还没有在严格控制的临床试验中被证实。 %。

youdao

Controlled clinical trials can evaluate the intervention or the herbal product, but not the full experience.

对照临床试验可以评价干预措施或草药产品，但不能评价全面的体验。

youdao

This is because there is little published evidence from controlled clinical trials to show most anti-aging products have any benefit.

这是因为临床试验被管制，大多数的抗老化产品是否有益就很少得到公开证实。

youdao

But randomized controlled clinical trials also are used to prove benefit in big drug studies.

FORBES

Cannon says only to weigh data from controlled clinical trials, which are expensive and are funded mostly from drug companies.

FORBES: In Vioxx's Wake

In June, the British Medical Journal published a major analysis of all the controlled clinical trials that have so far been presented.

FORBES: Magazine Article