Just thought I would post these guidelines from the Cleveland Clinic on essential nutrients needed by the body in abundant supply for wound healing. Fissures are especially challenging, and so it is easy to become deficient in the nutrition we need to heal.
The importance of nutrition in recovering from illness and injury is well documented. Clinical studies have discovered several types of foods that contain nutrients that can help heal wounds including deep cuts. For proper healing you need plenty of vitamin A, vitamin C, zinc and increased amounts of protein and calories.
VITAMIN A
Foods that are good sources of vitamin A include carrots, yellow squash, sweet potatoes, spinach, kale, collards, apricots, mango and cantaloupe. Generally foods that are deep yellow, dark green or orange are good sources of vitamin A. Vitamin A helps wounds heal, prevent infections and is needed for the health of skin and tissues in the body.
VITAMIN C
Foods that are good sources of vitamin C include oranges, lemons, grapefruits, kiwis, strawberries, red and green peppers, broccoli, Brussels sprouts, kale, cauliflower, tomatoes and sweet potatoes. Vitamin C helps wounds heal, prevents infection and helps produce collagen which is needed by your body's muscles, bones and tissues.
ZINC
Foods that are good sources of zinc include red meat, sesame seeds, pumpkin seeds, asparagus, shrimp and broccoli. Your body needs the mineral zinc so that your cells can properly read and carry out their genetic instructions. Zinc also supports the immune system.
PROTEIN
Foods that are good sources of protein include meat, poultry, fish and eggs. For wound healing, animal sources of protein are better than plant sources. Protein is the basic building block for all of your body's cells and tissues.
CALORIES
Healing any type of wound is an intensive process for the body, which means your body needs additional calories. Eat plenty of nutrient dense, healthy foods, and avoid foods that are high in calories but provide little nutrition.

Thank you for sharing the info, very helpful as always Jr2! I thought we were supposed to stay away from red meat though?

DynaMike
Only if it causes constipation or stools that are too large. A lot of people have that problem with it, but not everyone does, so it isn't like it needs to be avoided because it is somehow bad to eat when you have a fissure. It's more like a caution that of all the animal protein to choose from there are many people who report those effects from it and you just need to find out how your body works with it. . If it is a problem, there are alternatives for both zinc and protein.

It's also about portions. A small piece of good quality lean beef combined with a baked sweet potato and steamed mixed veggies is a lot different than a huge fatty steak that fills the entire dinner plate with a side of steak fries to go with it.

Two things I miss the most are meat and cheeze. They don't constipate me, in fact nothing does, but make my stool harder to pass ( even if combined it with veggies and fibers and stool softner ). My first retear happened after eating chicken drumstick. Didn't touch steak since all my problems started, I am to scare to experiment with animal proteins. When I cook meat for my family it smells so good, especially if it's BBQ! :(
I don't want to be a vegeterian!!!

Sana1
Yes, this is the unique problem we are faced with in trying to recover from fissures. We need the protein, and consistently in chronic wound healing studies it is animal protein that works best, but yet so many have trouble with it causing bigger or harder stools or even outright constipation.