Diet Reintroduction Guide

This guide walks you through when and how to reintroduce foods after an elimination diet. The plan is simple: Test one food at a time, go slow, and let your symptoms tell you which foods belong in your diet long term. The goal is to first add back the autoimmune foods you removed, then slowly add back medium and high FODMAP foods and any other foods that came out, moving you toward a full Paleo template with the widest variety of foods your body can handle.

✅ Are You Ready to Reintroduce?

You are ready to start when all of these are true:

• You have been on your elimination diet for at least 4 weeks.
  
• Your symptoms have plateaued. You feel stable and are no longer seeing new improvements week to week (for at least 1 full week).
  
• Any new supplements or GI-clearing herbs have been steady for 1 to 2 weeks.
  
• Your digestive support supplements (HCL, enzymes, and bile support) are dialed in.
  
• Your bowels are moving regularly: About 12 inches of stool per day, whether that comes in 1 or 2 to 3 bowel movements. (If you are carnivore and eating little fiber, expect smaller volume.) If you are constipated, see the Digestive Support Guide for how to get things moving first.
  
• You are eating enough. Watch the Nutrient Tracker video to confirm you are getting enough calories overall and enough protein, usually ¾ to 1 gram per pound of body weight. It also helps you spot any glaring micronutrient gaps, like low potassium or magnesium. Once you have watched it, use Cronometer to start documenting what you eat each day.
  

If you are still improving each week, keep going and hold off on reintroductions. Those improvements are your body telling you the diet is still doing its job.

📅 How to Test a Food

Test one food at a time over 2 to 3 days, or longer if you know you are sensitive:

• Day 1: Eat a very small amount, one bite or one teaspoon.
  
• Days 2 and 3: If you feel fine, gradually increase toward a normal serving.
  
• No symptoms after 2 to 3 days? The food passes. Keep it in your diet and move on to the next food.
  
• Symptoms return? Remove the food, let things settle, and retry it later.
  

Never test two new foods at the same time. If you react, you will not know which food caused it.

👀 What Counts as a Reaction?

A reaction is anything new or noticeably worse in the days after testing a food:

• Digestion: Bloating, gas, reflux, stool changes
  
• Energy and mind: Fatigue, brain fog
  
• Joints and skin: Joint pain, rashes, breakouts
  
• Mood and sleep: Mood changes, restless or poor sleep
  

🍳 What Order to Reintroduce Foods

Reintroductions happen in phases, starting with the foods most people tolerate well and working up to the foods most likely to cause reactions. First come the autoimmune foods, then higher FODMAP foods, then higher histamine foods if they apply to you. Only test what applies: If you never removed a food, or it is not something you normally eat, skip it and move on to the next one.

🛡️ Phase 1: Autoimmune Foods (If Applicable)

Start with the autoimmune foods you removed, in this order:

1. Eggs

• Start with runny yolks only (poached, sunny-side up, or over-easy). Yolks are usually easier to tolerate than whites.
  
• If yolks pass, test the whole egg next.
  

2. Dairy (in this order)

Work down this list one item at a time. Ghee and butter come first because they contain almost none of the lactose and casein that most people react to.

• Ghee (least reactive)
  
• Grass-fed butter
  
• Raw yogurt (with Dr. J’s approval)
  
• Raw cheese (with Dr. J’s approval)
  
• Raw milk (with Dr. J’s approval)
  

3. Nuts and Seeds

• Test one type at a time. Almonds and walnuts are different tests.
  
• Soaked nuts and seeds may be easier to digest.
  

4. Nightshades

• Examples: Tomato, potato, eggplant, peppers, paprika, and chili powder.
  
• In sensitive people, nightshades can flare joints, skin, or digestion.
  

🥦 Phase 2: Higher FODMAP Foods (If Previously Removed)

FODMAPs are fermentable carbohydrates that feed your gut bacteria. In a sensitive gut, they can cause gas, bloating, and stool changes. Test them after your autoimmune food reintroductions are complete.

Pick your own favorite medium and high FODMAP foods from Dr. J’s color-coded FODMAP handout, linked below. The foods listed here are only examples, and all of them are Paleo-friendly. If a food is not something you normally eat, you do not need to add it back in.

Start with MEDIUM FODMAP foods (the middle column on the FODMAP handout). Examples:

• Avocado (small portion)
  
• Sweet potato (up to ½ cup)
  
• Broccoli (moderate portion)
  
• Cauliflower (moderate portion)
  
• Mushrooms (moderate portion)
  
• Brussels sprouts
  

Once medium foods pass, move on to HIGH FODMAP foods (the right column on the FODMAP handout). Examples:

• Garlic
  
• Onion
  
• Asparagus
  
• Apples
  
• Cherries
  

👉 Click here to view Dr. J’s color-coded FODMAP Handout

🧀 Phase 3: Higher Histamine Foods (If Applicable)

This step only applies if Dr. J had you remove higher histamine foods. Histamine builds up in foods as they age, ferment, or cure. In sensitive people it can trigger flushing, headaches, hives, congestion, or a racing heart.

Use the same rhythm as every other food: One food at a time, small portion first, 2 to 3 days each. Start low and work your way up:

• Focus on lower histamine foods first. Freshly cooked meat and poultry eaten right away, fresh or freshly frozen fish like salmon or cod, egg yolks (if they passed earlier), and most fresh vegetables, such as leafy greens, zucchini, carrots, cucumber, squash, and sweet potato. Fresh fruits like blueberries, blackberries, apples, and grapes fit here too, along with olive oil, coconut oil, and fresh herbs.
  
• Transition to moderate histamine foods next. Avocado, spinach, banana, and citrus like oranges and lemons. Strawberries and pineapple can also nudge histamine release. This tier includes slow-cooked meats, bone broth, and leftovers eaten within a day.
  
• Save the highest histamine foods for last, one at a time. Fermented foods (sauerkraut, kimchi, kombucha, coconut kefir), aged cheeses, cured or smoked meats (bacon, salami, smoked salmon, jerky), canned fish (tuna, sardines, anchovies), shellfish, dried fruit, vinegar and pickled foods, and leftovers more than a day or two old. Wine and other alcohol are heavy hitters here too.
  

One more note: If Dr. J had you pull out any other specific foods that are not on these lists, Phase 3 is where those come back in too. This could include salicylates, oxalates, or any other foods on your personalized list. Add them one at a time, using the same testing rhythm.

🎯 The Long-Term Goal: A Full Paleo Template

Reintroduction is not meant to leave you on a strict diet forever. The goal is to first add back the autoimmune foods you removed (eggs, dairy, nuts and seeds, nightshades), then slowly add back medium and high FODMAP foods, followed by histamine foods or any other foods on your personalized list. Each food that passes earns you more variety, and the finish line is a full Paleo template with the widest array of food options your body can handle.

As a simple compass: Most of your meals should be nutrient dense, anti-inflammatory, low in toxins, and organic when possible. On the other side of the fence, do your best to stay away from foods that are inflammatory, high in toxins, and nutrient poor.

How on point you need to stay depends on where your health is:

• The healthier you become, the more flexibility you earn. Many patients settle into an 80/20 or 90/10 pattern, staying on point with their template 80 to 90 percent of the time.
  
• The sicker you are, the closer to 100 percent you need to stay. This is especially true with autoimmune issues. A stressed immune system has much less room for slip-ups.
  
• Flexibility is earned, not assumed. As your gut heals and symptoms stay quiet, you can loosen up a little. If old symptoms creep back, tighten up your template for a while and let things settle.
  

Know Your Kryptonite

Think of yourself like Superman or Superwoman. They are strong, but kryptonite weakens them every time they get near it. As you widen your diet, you may discover a food or two that acts like your personal kryptonite. If a food consistently makes you feel weaker, keep it out. The goal is to feel great first and to have variety second. Widen your diet as far as your body allows, and simply steer around your kryptonite if you truly have one.

Wide variety is the goal. Just steer around your kryptonite.

📌 Quick Rules to Remember

• One food at a time, spaced 2 to 3 days apart.
  
• Start small and increase slowly.
  
• Watch for delayed reactions, up to 72 hours out.
  
• Keep a simple food and symptom journal. A few notes each day makes patterns easy to spot.
  
• Make sure your digestive support supplements are dialed in before you start. The Digestive Support Guide shows you how.
  
• Keep your bowels moving regularly: About 12 inches of stool per day. If you get backed up, the Digestive Support Guide covers how to address constipation before you test more foods.
  
• A food that fails is useful information, not a setback. You can always retest it later.
  

Questions?

If you are unsure whether a reaction counts or how to move forward, email us at office@justinhealth.com or schedule a follow-up consult with Dr. J to review your reintroductions together.