Kubachka KM, Hanley T, Mantha M, Wilson RA, Falconer TM, Kassa Z, Oliveira A, Landero J, Caruso J (2017) Evaluation of selenium in dietary supplements using elemental speciation
They warn that the lack of rigorous clinical trials and standardized protocols raise serious safety concerns, including the risk of hepatotoxicity (liver damage caused by chemicals) and allergic reactions like anaphylaxis
There's also no evidence of carcinogenicity, mutagenicity, or reproductive toxicity from dermal exposure of this ingredient
While these effects are often cited by users, there is currently insufficient clinical evidence to show that combining them with Retatrutide improves recovery, sleep or long-term treatment outcomes
Read on to learn more about the possible benefits of L-theanine, potential side effects, and dosage information
Cons: Vary in absorption and efficiency, potentially longer periods to observe health benefits, no skin-lightening effect, and requires consistent long-term use to maintain levels