What is true is that if a product contains so-called N-nitrogenating agents (e.g.: preservatives like 2-Bromo-2-Nitropropane-1,3-Diol, 5-Bromo-5-Nitro- 1,3-Dioxane or sodium nitrate - so look out for things with nitro, nitra in the name) that together with TEA can form some not nice carcinogenic stuff (that is called nitrosamines)
Those links matter because pain and heat can break up sleep even when you fall asleep fast
Endocrinology and Metabolism, 34 (3), 247
Or, ask around: people are reporting strange, vivid (or both strange and vivid) dreams during this novel coronavirus pandemic, whether they're about the actual virus or not
No human dosing, administration, therapeutic, diagnostic, or preventative claim is made