If you wake up tired, crash in the afternoon or feel like your energy never fully “comes back,” certain foods may be contributing. Delayed IgG food sensitivities can drive ongoing inflammation that affects both your gut and your nervous system.
Chronic fatigue is more than being “a little tired.” It’s the feeling that your body and brain are running at half speed, even after sleep. When food sensitivity is involved, the immune system reacts to specific foods, and that low-grade inflammation can quietly drain your energy day after day.
Common categories that may contribute to fatigue include: gluten, wheat/grains, dairy and casein, yeast, sugar and refined carbs, and processed foods with multiple ingredients. For a broader explanation, see What Causes Food Sensitivity?.
The Pinnertest Food Sensitivity Test measures IgG reactions to more than 200 foods. Your results can highlight which foods may be contributing to inflammation, digestive symptoms and low energy, so you and your practitioner can design a targeted elimination plan.
Learn how the lab process works in How IgG Food Sensitivity Testing Works .
For pricing and comparison details, see Food Sensitivity Test Cost and Best Food Sensitivity Test 2025.
If your energy is inconsistent and seems to rise and fall with food, it can help to track your meals and symptoms for a few weeks. Note which days you feel clearer or more energetic, and what you ate in the 1–3 days before.
Patterns to look for:
Once you have your Pinnertest results, you and your healthcare provider can design a structured elimination plan, temporarily removing the highest-reactive foods and then reintroducing them carefully while tracking energy, mood and digestion. For guidance on what to eat during this phase, see Best Foods to Eat After Removing Trigger Foods .
Yes. When your immune system reacts to certain foods, it can create ongoing inflammation that affects your gut, brain and energy levels. Many people feel more energetic after identifying and removing specific trigger foods, especially when guided by a practitioner. Learn more in Food Sensitivity & Fatigue.
Gluten, wheat, dairy, casein, yeast, certain nuts and high-sugar foods are frequent contributors. However, each person’s pattern is unique. Pinnertest helps reveal which foods your immune system reacts to most strongly so you can focus on your personal triggers.
Pinnertest does not treat or cure any condition. It identifies IgG food sensitivities so your healthcare provider can decide whether removing certain foods might help reduce inflammation and improve symptoms like fatigue, brain fog and headaches. You can start here: Order Pinnertest.