General Discussion
In reply to the discussion: I for won do not understand the current trend towards "scent" laundering [View all]jmbar2
(7,606 posts)Length of prior exposure to chemicals could be a factor. I grew up in Houston, and a lot of my adult career was working for the oil & gas industry. I wasn't close to the refineries very often, but they definitely affected Houston's air at times.
A big part of safety training was following regulations on Exposure Limits to various chemicals. There were different levels of exposure limits to be able to safely endure a specific substance without experiencing any adverse health effects.
-Occupational Exposure Limit (OEL)
-Threshold Limit Value (TLV) Max exposure over a lifetime
-Recommended Exposure Limit (REL)
-Permissible Exposure Limit (PEL)
-Time-Weighted Average (TWA)
-Short Term Exposure Limit (STEL)
-Ceiling Exposure Value (CEV)
https://surehire.com/blog/2023/07/05/7-essential-exposure-limit-terms-that-all-employers-should-understand/#:~:text=A%20TWA%20exposure%20limit%20uses,Term%20Exposure%20Value%20(STEV).
These limits are supposed to be determined by rigorous testing. However, the perfume industry is exempt from this testing. Makes me think that prior chemical exposures might indeed contribute to reactions to chemicals in perfumes, but there is no science on it.