Chinese herbal medicine is an oriental feature, and there are few authoritative studies abroad. What can be found in China at present is a paper published by Guangzhou Institute of Quality Supervision and Inspection on 20 15. The researchers collected 28 kinds of anti-alopecia shampoos in Guangdong at that time, and then tested the effective contents of 15 kinds of plant extracts such as ginger, cacumen platycladi, salvia miltiorrhiza and Polygonum multiflorum. The highest concentration of paeoniflorin is 2 1 1 mg, which is 2. 1 per kilogram. As for the other components, they are all parts per million or parts per million of 65438+, and even there are six effective substances, which directly fall out of the minimum limit of the detection method, that is to say, they are too few to be detected.
However, we need to clarify a concept. What we measure here is the content of effective substances, which is not equal to the content of plant extracts, because plant extracts usually contain some auxiliary materials such as water, ethanol and propylene glycol, and effective substances are only a small part of them. What is the effective substance? For example, paeoniflorin is the effective substance of Paeonia lactiflora and gingerol is the effective substance of ginger. These substances can play a role because of these effective substances.
For example, if we add 1% ginger extract to a bottle of shampoo, and the gingerol in this extract is only 1%, then the content of gingerol in shampoo is 1%, which is one ten thousandth. So we see that sometimes some shampoos, if they claim to have added many plant extracts, do not mean that there are so many effective substances in them. Whether this research result can reflect the current situation of Chinese herbal shampoo, I don't comment, but people who use this stuff every day know best.
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