If Steel was routinely sleeping for four hours a night, she would be drastically underestimating the negative impact, says Alison Gardiner, founder of the sleep improvement programme Sleep station.

睡眠改善项目“睡眠站”的创始人艾莉森·加德纳说，如果斯蒂尔通常每晚只睡4个小时，她就大大低估了其负面影响。

youdao

The super thin pearl powder has the efficacy of sleep improvement.

超细珍珠粉具有改善睡眠作用。

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To study the effects of the super thin pearl powder with different doses on sleep improvement.

研究不同剂量超细珍珠粉对改善睡眠的影响。

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Most of the studies measure patients' subjective assessment of their sleep improvement instead of objective evidence from a sleep lab, he adds.

WSJ: Can a Root Get to the Problem of Insomnia?

Vanda Pharmaceuticals said the trial would last six months and aim to show an improvement in total sleep time.

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