Alchemist's Genius

Flasks have increased effect on you, and you gain an increased number of Flask Charges.

Alchemist's Genius is a buff that increases Flask Charges gained by 20% and effect of Flasks by 10%, for 4 seconds.

Sources

Brutal Restraint that adds the following modifier to an allocated notable passive skill in range :

The Spiked Concoction notable passive skill grants Alchemist's Genius when you use a flask.

The Module Error: No results found for item using search term "item_name = Essence of Horror" grants the following modifier on belts :

Name	Generation Type	Groups		Stats
of the Essence	Suffix	AlchemistsGeniusOnFlaskUseChance	63	Gain Alchemist's Genius when you use a Flask

Version	Changes
3.16.0	[Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.] Now also granted from the belt mod of the Module Error: No results found for item using search term "item_name = Essence of Horror"
3.15.0	The Alchemist's Genius buff from the Spiked Concoction Notable now grants 10% Increased Flask Effect (previously 20%).
3.11.1b	Fixed a bug where the Alchemist's Genius buff didn't apply to various Flask effects, including the Vaal Skill stats from the Module Error: No results found for item using search term "item_name = Soul Catcher" unique Module Error: No results found for item using search term "item_name = Quartz Flask".
3.11.0	Introduced to the game.