What ingredients do you need to make a good healing potion in Elder Scrolls IV - Oblivion?

Answer 1

There are many ingredients that can create Restore Health potions, though some require a higher Alchemy skill before that particular property is visible. However even a novice alchemist can use ingredients like Aloe Vera Leaves, Sweetcakes, Cairn Bolette Cap, Boar Meat, Mugwort Seeds, Venison and Lady's Mantle Leaves.

The key to making a good healing potion though is not determined by the ingredients, as every ingredient provides them same healing effect. What determines the strength of the potion is your alchemy skill, and the quality of the alchemical equipment you use.

The more poor potions you make, the more chance you've got of increasing your alchemy skill, and in time, you'll be making more effective potions.

Answer 2

You need a mortar and pestle at least but you can upgrade to more