Vaping does not kill gains, neither does smoking cigarettes or cigars. Plenty of guys have gotten fucking yolked while smoking nicotine. Sure it might have negative health effects but it doesn’t just “kill your gains”.
For anyone not on TRT, negative health effects, depending on which effects, automatically mean kill gains. Not cigarettes but vapes often do. Not to be the smartass here but many vape juices, especially if opioids and tryptamines are in the mix elevate prolactin. Now let me sound like a bible thumper except I'm thumping research articles:
A cloud on the horizon–a survey into the use of electronic vaping devices for recreational drug and new psychoactive substance (NPS) administration
"The commonest recreational drug to have been vaped was cannabis with 155 (65.7%) reporting lifetime use and 91 (38.6%) reporting use within the last 30 days. Lifetime use was also high for vaping MDMA/’ecstasy’ (101, 42.8%), cocaine powder (94, 39.8%), mephedrone (73, 30.9%), crack cocaine (72, 30.5%), synthetic cannabinoid receptor agonists (67, 28.4%), fentanyl (63, 26.7%), heroin (61, 25.8%), alpha-PVP (alpha-pyrrolidinopentiophenone)(61, 25.8%), typtamines (60, 25.4%), NBOMe (2, 5-dimethoxy-4-bromophenethylamine) (59, 25%) and ketamine (58, 24.6%) (Figure 1). GHB (Gamma Hydroxybutyrate) (1, 0.4%), Magic Mushrooms (1, 0.4%), Solvents (1, 0.4%) and LSD (Lysergic acid diethylamide) (1, 0.4%) were also self-reported via free text entry to have been vaped by individual respondents."