I was surprised that co2 extracts would raise eyebrows, since other extracts have been freely discussed. We and our plants ingest co2 with every breath, and co2 in solid, liquid, and gaseous forms is widely used in the food and beverage industry. If it's deemed inappropriate for this forum, I'll certainly not mention it again. In the meantime, for information purposes, here's an old article about it from High Times Mag:
https://hightimes.com/grow/what-is-co2-oil/