don't hold in the smoke, puff, exhale, puff again. No benefit to holding cannabis smoke. https://pubmed.ncbi.nlm.nih.gov/2554344/ https://pubmed.ncbi.nlm.nih.

don't hold in the smoke, puff, exhale, puff again. No benefit to holding cannabis smoke. https://pubmed.ncbi.nlm.nih.gov/2554344/ https://pubmed.ncbi.nlm.nih.gov/2554344/ https://www.algonquincollege.com/umbrellaproject/dont-hold-your-breath/ https://www.algonquincollege.com/umbrellaproject/dont-hold-y...