The phrase "about these substances" is correct and usable in written English.
It can be used when discussing or referring to specific substances in a context, such as scientific, medical, or general discussions.
Example: "The research paper provides detailed information about these substances and their effects on human health."
Alternatives: "regarding these substances" or "concerning these substances".
There is no justification for consumers' worries about these substances.
The key is to know more about these substances, so we are not blindsided by unexpected hazards.
By marketing products as "free from" supermarkets are playing on people's fears, which are based on the rumours that have circulated about these substances.
It may not be popular with some of our players, but it is needed because we just don't know enough about these substances and we have to be careful".
You may not be able to convince your friends to change their behavior; however, it's certainly within your power to learn more about these substances and how to approach them about this in a non-judgmental way.
Both sides have an interest in learning more about these substances, their risks and effects, and getting that information out to the public.
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We hoped that this would act as a warning to other young people about putting these substances in their bodies: you really don't know what you are taking or how it will affect you.
Obtaining additional history about smoking these substances can be helpful in making a clinical diagnosis until more widespread laboratory testing becomes available.
BPA had been among 200 chemicals singled out by the Chemicals Management Plan for inclusion in a "challenge to industry," meaning these chemicals were flagged as the most likely to cause environmental and/or health problems, and their manufacturers would be among the first to be asked about how these substances were being handled.
Think about how these substances could injury your employees.[3].
