The introduction: 

This mod is designed to improve Alchemy by changing the ''SingletonItem'' system and tags for something that feel more like Skyrim! So instead of brewing every potion once, being able to carry a maximum amount of 3 potions + 1 Mutagen Decoction of each, having to meditate to restore your potions back in stock ; now it's bringing back the interest of gathering herbs & ingredients, making the process of brewing potions occur more often, it's allowing you to carry more of each. Toxicity is there to stop you from consuming too much of each anyway. It's giving you more freedom in your Potion consumption, but still require you to think twice before you drink them because you have to make good choices to make sure you'll still have your most importants ones when it really matter. With great powers come great responsibilities. Unless you're a great alchemist who already brewed hundred of them to be prepared for every situation.

What motivated me to use it in the first place was to find a way to make it through an important battle that occurs during the story, in which there is multiple phases and a certain bug is making our potions effects wear off in the middle of this battle, when no moment allows us to meditate to retrieve our potions during that quest, it can be problematic. But what kept me with this mod is the enhanced realism! Next Gen Alchemy is a direct successor of Better Alchemy, a mod that was originally created by the great DerGoldsucher in 2017, for The Witcher 3 GOTY 1.31. The Witcher 3 Next Gen updated so many files that this mod had to be updated from The Complete Edition's 4.00 files to make it compatible and allow every new feature to coexist together.

About the original concept:

As the original description said, Better Alchemy is a mod that DerGoldsucher made because he was bothered by the fact that Geralt could only refill all of his potions, including oils, bombs with meditation and some alcohol.

The mod tries to make alchemy more realistic and like in the previous games, but without changing too much about the vanilla behavior. It was mainly made for personal use. Some things are probably not properly balanced yet, but feedback are welcome. Of course, the original creator is a very talented and skilled modder, while I'm a very modest one, so I can assist you when I'll have some time, but I cannot do miracles.

Features and Changes:

Alchemy items behave like any other item:

• Once you use them, they are gone and you have to make them again.
• The amount of each potion, bombs, oils etc. that you can have is no longer limited, you can craft as many items as you need.
• Alchemy items can be stored in the stash and sold to merchants.
  

Reduced cost:

• Brewing no longer needs as many ingredients as before.
• Only renewable ingredients are needed.
• Merchants sell a lot more herbs (not more kinds of herbs, but a higher quantity of each).
• To make mutagen potions, you still need to have the according mutagens but they are not consumed when making the potion. (Be sure to always keep one of each mutagen!)
• When crafting alchemic substances (Nigredo, Albedo etc.) you now get 5 substances each time.
• You get back an empty bottle when using alcohol to make substances.
  

Improved Stats:

• Increased potion duration
• Increased mutagen potion duration
• Increased oil uses
  

Changable bases:

• The base items (strong alcohols for potions, fats for oils, powders for bombs) are no longer fixed for each recipe but can be swapped out for other items of the same type.
• To do so you have to select the item and press X (R2 on gamepad), which opens a dialogue where you can select the item you want to use. You can also use the
  arrow keys (dpad_up/dpad_down on gamepad) to scroll through the items.
  
  

Manticore armor and cockatrice decoction:

• The Cockatrice decoction and the second-tier bonus of the Manticore armor both previously increased the maximung amout of potions you could carry by 1. Since the number is no longer limited, these features are useless and they now both give a +50% chance of acquiring additional herbs. This perk is already in the game but it was never used because there was no point in collecting too many herbs anyways.
• This means that you will always get an additional herb when wearing the full Manticore armor and having the Cockatrice decoction effect.
  

Laboratory in Corvo Bianco:

• Like the Manticore armor and the Cockatrice decoction, the laboratory in/under Corco Bianco previously increased the maximum amount of alchemy items by 1. Instead of this, it now opens the alchemy screen when being used.
• Making potions, bombs or oils in the laboratory is a lot more efficient and you now get two instead of just one item when you make something in the laboratory.
  

Other Changes:

• You can directly navigate to the recipe of an ingredient using C (R1 on gamepad)
• Items in the alchemy menu are now primarily sorted by their quality (higher quality items are on top) instead of their name.
• Mutagens now have their own category and are no longer in the "Alchemy Substances" category.
• Before brewing something, there is now a dialogue, where you can choose the amount of items you want to make.
  

Installation:

• Please Backup your game before doing anything that imply modifying your installation
•  Put it in your "Mods" folder
  

•  Script Merger tool. 
• Make sure everything is in place, endorse the classic version and enjoy!
  

Since the last updates, all you have to do is to install and not even bother with installing Better Alchemy anymore, so it's easier to install*

This mod is an update of Better Alchemy for the Next Gen Edition of The Witcher 3 . It doesn't contain any of the Better Alchemy original files, it's entirely new files that were taken from The Witcher 3 Complete Edition and modded back to be nearly identical to Better Alchemy. But the real creator is DerGoldsucher , I want to show respect to his/her creation and I hope it doesn't bother if I updated this mod for the Next Gen! If the Author want to personnally update it and upload after, I will respect this aswell. Don't forget that Next Gen Alchemy still requires BA's local files.
Since the last updates, local files are included so you only need Next Gen Alchemy, that's all!

Recommended Mods: 
Brothers in Arms
Better Icons  
and so much more

Projects :
Additional Alchemy Next Gen Edition ✓
Dijkstra Doppler ✓
Some nice mods I like later


Thank you to CD Projekt Red for The Witcher Franchise
Thank you to DerGoldsucher for creating Better Alchemy and the permission to share this
Thank you to modders, people who download, endorse and contribute to a great modding community