[Hasknewbie]

A recent study here in Europe as found that some low-quality CBD e-liquids contain traces of solvent (used to extract said CBD) that are above safety level and may trigger adverse reaction in vapers. I assume THC e-liquid goes through the same sort of process and may have the same issue.

[buttcoinslol]

Yes, residual solvents are possible with the THC extraction process. I prefer to use THC concentrates extracted with CO2 to avoid inhaling residual solvents.

[whenchamenia]

Co2 iirc is a physical extraction, like bubble hash, while this is concerning solvent hash, a different product.

The correct way to extract solvents is under vacuum.

[ficklepickle]

Supercritical CO2 is a (very non-polar) solvent. I can't imagine what would make that a physical or mechanical extraction.

Good CO2 extraction uses two passes at different pressures. One to extract the terpenes and one for the cannibinoids.

[robocat]

Can you tell only CO2 was used?

[tapland]

I would love it if you had a link to that study. A relative of mine is on the lookout for CBD oils and I said I'd help find what there is.

[Hasknewbie]

I don't have a direct link to the study, but this is from the BBC (https://www.bbc.com/news/health-48950483):

"The researchers also found the presence in seven products of the solvent dichloromethane, which can cause wheezing and shortness of breath, at levels above food safety limits."

[Scoundreller]

Are food safety limits the appropriate limit for something that will be largely exhaled?