The Lion Diet is designed to be a 1–6 month elimination phase, after which most people will want to reintroduce other foods. This chapter is how to do that systematically — so you end up knowing what you actually tolerate, instead of broadening too fast and losing the diagnostic clarity you bought with all that restriction.
When to start reintroducing
The general guideline: wait until your symptoms have substantially improved and held that improvement steady for at least 4 weeks.
"Improved" is honest about realistic expectations. Some people will not be 100% symptom-free even on the strict diet — there may be background residual symptoms from old damage, environmental exposure you can't escape, or hormonal patterns the diet doesn't reach. "Improved and steady" means: you've reached a baseline that's clearly better than where you started, and that baseline is holding without surprise flares.
If you're still seeing flares while strict on the diet, don't start reintroducing yet. Investigate the environmental, contamination, or histamine factors first (Chapters 7 and 9).
The reintroduction principle
The whole point of reintroduction is to identify which foods actually trigger you. To do that cleanly, you have to introduce one food at a time, in isolation, with enough time between introductions to see a reaction.
The reaction window matters. Type III hypersensitivity reactions can take several days to a week to develop symptoms after you eat the trigger food. This is why "I ate eggs at lunch and felt fine that evening" doesn't mean eggs are safe — you need to wait a full week to know.
The standard protocol I use:
- Pick one food to reintroduce.
- Eat a small portion, once a day, for 3 days.
- Then stop and wait a full week, eating only your stable Lion Diet baseline.
- Watch for any return of old symptoms — joint pain, skin reactions, mood instability, digestive symptoms, sleep changes, brain fog, fatigue.
- If no reaction at the end of the week, the food is in your "likely safe" list — but recheck periodically by eating it more often.
- If any reaction, the food is in your "trigger" list. Go strict again for a few weeks to clear, then try a different food.
This is slow. Reintroducing 10 foods takes about 10 weeks. Most people want to go faster and pay for it by introducing multiple foods at once and not knowing which one caused a reaction.
What to reintroduce first (lowest reaction risk)
I'd reintroduce in roughly this order, starting with the foods that are least likely to cause problems:
- Salt variations — different brands, sea salt, mineral salts. You're already eating salt; this just expands what you can use.
- Other ruminant meats if you've only been eating beef — try lamb, goat, bison, deer, elk.
- Bone broth and organ meats. Higher nutrient density. Some people react to organ meats (especially liver) due to histamine; introduce carefully.
- Low-reactivity plant carbohydrates — sweet potatoes, parsnips, carrots, pumpkin. Cook well, eat in moderate portions.
- Low-FODMAP fruits — pears, blueberries, raspberries, melon. Eat alone, not with meat.
- Other meats: pork, poultry, fish. Each introduced individually.
- Eggs — one of the most common reactive foods. Try whites and yolks separately if you can.
- Dairy — start with low-reactivity options like grass-fed butter or ghee. Add aged hard cheese before fresh milk or whey.
- Nuts and seeds — common reactive foods. Test sparingly.
- Caffeine and alcohol — both can disrupt the nervous system recovery you've been doing. Reintroduce cautiously and watch for sleep and mood effects.
- Grains (last, if at all). Many people on the diet long-term find they don't tolerate gluten well; some don't tolerate any grains. Test individually if you want to try.
What likely won't go back well
In my own experience and what I've heard from many others:
- Gluten — for most people who had a meaningful response to the Lion Diet, gluten doesn't come back. The reactions are too strong and too consistent.
- Processed seed oils (canola, soybean, sunflower, safflower, etc.) — once you've cleared these, the inflammatory load they cause is very noticeable when you reintroduce them.
- Refined sugar — many people find their blood sugar regulation became dramatically more sensitive on the diet, and a sweet snack now causes the kind of crash they used to live with all day.
- Heavily-processed foods in general — "natural flavors," preservatives, food dyes, emulsifiers. Most people in the Lion Diet community end up rejecting most processed food permanently because the reactions are too noticeable.
This isn't a moral statement about "clean eating." It's an observation that once you've reset your reactivity baseline, the things that were making you sick before become more obvious.
IgG food sensitivity testing
If you want to accelerate the reintroduction phase, an IgG food sensitivity panel can help identify your highest-risk foods up front. Two notes:
- IgG testing is different from IgE allergy testing. IgE testing identifies acute allergic reactions (anaphylaxis, hives). IgG testing identifies slower, delayed reactions of the kind that type III hypersensitivity drives. Both have value; for the kind of food sensitivities the Lion Diet addresses, IgG is the more relevant test.
- IgG tests have variable accuracy. Mainstream medicine doesn't fully endorse IgG food testing because of false positives. In my experience, IgG tests have been useful for identifying my major triggers (gluten, dairy, eggs all came back high for me), but the lower-positivity items on the panel were less reliable. Use the test as a starting hypothesis, not a verdict.
I went into this in more detail in Antidepressants — "Natural" and Otherwise and other posts on the site.
Building your personal "safe list"
After 6–12 months of careful reintroduction, you'll have a personal list that looks roughly like:
- Foods I can eat freely with no symptoms.
- Foods I can eat occasionally but not regularly.
- Foods that trigger me reliably — to be avoided.
The list is yours. It's not transferable to anyone else. The whole point of the Lion Diet protocol was to give you the diagnostic clarity to build this list — without the reset, you'd never know.
The maintenance phase
Once you have your safe list, you're in a maintenance phase. Most people I know who've gone through this stay roughly carnivore-leaning for life, with their tolerated foods rotated in periodically. Some people land on something more like paleo with their identified safe additions.
If symptoms come back, you go back to strict Lion Diet for a few weeks to clear, then resume your maintenance pattern. This is the long-term game: a clear baseline you can always return to, plus a personal map of what you can and can't add to it.
Chapter 11 covers the long-term picture — pregnancy, kids, what changes as you live with this for years.