How to make a character gain less sanity, health and hunger from all food?

[Aurorance]

I have seen a tutorial about making a character gain more/less value on the specific food, the example looks like this

 

AddPrefabPostInit("carrot", function(inst)
        if GetPlayer().prefab == "character" then
            inst.components.edible.healthvalue = 2
            inst.components.edible.hungervalue = 0
            inst.components.edible.sanityvalue = -3
        end
    end)

However, this only works on the specified food (carrot), and I want it works on every food.
What should I edit to make it works?

Also, I want to combine it with the perk below
 

AddPrefabPostInit("nightmarefuel", function(inst)
        if GetPlayer().prefab == "gojo" then
            inst:AddComponent("edible")
            inst.components.edible.foodtype = "MEAT"
            inst.components.edible.healthvalue = 5
            inst.components.edible.hungervalue = 10
            inst.components.edible.sanityvalue = 10
        end
    end)

I make my character (named gojo) can eat nightmare fuels.

If I want to make Gojo gain half of the values only when eating anything, except nightmare fuel (still 5,10,10 respectively)
what and where(character pretab or modmian.lua?) should I add in the lua file?

Sorry if the questions are unclear.

P.S. learning how to create a character mod recently (from 0 knowledge of coding), I hope someone can help me through answering my frequently-asked noob questions through discord. I will be very thankful for that if someone can help me!

[DecDuck]

Use:

inst.components.eater:SetAbsorptionModifiers(0.5, 0.5, 0.5)

in the character file. Then just make that values for nightmare fuel double