Food and Rest Rules (5e Variant Rule)
From D&D Wiki
Each character has a base Energy storage of 2*CON+6 and loses 2 Energy per 24 hours. Each day at 0 Energy gives an Exhaustion level. You can only eat 1 lb of food per short rest. Being over base Energy level gives disadvantage on DEX checks and saving throws.
|Quality||Energy per lb|
|Squalid||1 + CON DC 15 for +1|
|Poor||1 + CON DC 10 for +1|
|Comfortable||2 + CON DC 15 for +1|
|Wealthy||2 + CON DC 10 for +1|