Items/Compounds

Nutritional Supplement
Nutritional Supplement is medicine that relieves fatigue. It is also effective as a method of rapidly recovering from malnourishment. Found in chapter 『Chapter 13』 of the web novel.

Recovery Potion
Recovery Potion is medicine that treats certain illnesses. It is less effective against more severe diseases. Found in chapter 『Chapter 13』 of the web novel.

Antidote
Antidote is used to cure poisoning effects and is responsible for unlocking the Anti Poison Shield. Found in chapter 『Chapter 35』 of the web novel.

Herbicide
Herbicide is typically used to kill weeds, but can kill a large variety of plants and it happens to work pretty well against plant based monsters as well. It is responsible for unlocking the Glyphosate Shield. Found in chapter 『Chapter 35』 of the web novel.

Healing Ointment
Healing Ointment is a topical version of the recovery potion. It is used to treat minor wounds and scratches. It is responsible for unlocking the Medicine Shield. Found in chapter 『Chapter 35』 of the web novel.

Gunpowder
Gunpowder is used to create explosions when set ablaze. By collecting it in bags and setting the bags on fire at the appropriate time, it is possible to create make-shift bombs however when Naofumi attempts to use them against an enemy the power of the bombs are degraded. They simply burn the bag to ash due to either his lack of attack stat or the shield's restriction on using weapons besides itself. It is responsible for unlocking the Plant Fire Shield. Found in chapter 『Chapter 35』 of the web novel.

Strong acid
Strong acid is stored in a glass bottle and seems to be a little less acidic than sulfuric acid. It is used during inside the Spirit Turtle on the Mimic Type Familiars that were imitating the floors and walls blocking further exploration to awaken them. Found in chapter 『Chapter 35』 of the web novel.

Magic Power water
Magic Power water restores magical power when drunk, but the materials are rare and hard to acquire. It is an expensive medical herb. Found in chapter 『Chapter 35』 of the web novel.

Soul Healing Medicine
Soul Healing Medicine restores SP. It also seems to be rare and difficult to prepare. Found in chapter 『Chapter 35』 of the web novel.

Insecticide
Insecticide is made by mixing and dissolving grass that repels insects until it hardens. It is used to kill insects and is also pretty effective against insect based monsters. It is responsible for unlocking the Killer Insect Shield. Found in chapter 『Chapter 35』 of the web novel.

Crackling grass
Crackling grass is some kind flammable grass that can be used as Gunpowder substitute. Found in chapter 『Chapter 35』 of the web novel.

Lukol pill
The Lukol pill is an herbal supplement that aids in the recovery of SP, MP and status magic. During the fight with the Spirit Turtle Firo received it from the Queen to give to Naofumi to allow him to continue the fight. It can likely be made by compounding. Found in chapter 『Chapter 120』 of the web novel.