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Immune Systems (Diseases & Physical Ailments, Books): Amazon KDP category data
Amazon Books Best Sellers data for Immune Systems (Diseases & Physical Ailments, Books), updated Nov 3, 2026: median price $16.64, median 658 reviews, average rating 4.5 and a KDPTop opportunity score of 27/100 (highly competitive).
| Price range (middle 50%) | $13.53 – $21.41 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 6% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 28% of the parent category Diseases & Physical Ailments (2,378), one of the easier corners under it.
- Its review barrier is higher than in 80% of Books categories: the median best seller has 658 reviews, so new books need time to build up.
Top 10 Immune Systems best sellers
-
The Lymphatic Flow Method: The Step-by-Step System to Reduce Inflammation, Support Detox, and Restore Whole-Body Flow at Home
by Dr. Caitlin Czezowski
- List rank#1
- Price$28.99
- Reviews-
-
Bloodlines: A Memoir
- List rank#2
- Price$14.95
- Rating4.5
- Reviews95
-
Ending Chronic Illness: A Revolutionary New Program to Reverse Inflammation and Heal Persistent Disease
- List rank#3
- Price$29.12
- Rating4.4
- Reviews11
-
Super Gut: A Four-Week Plan to Reprogram Your Microbiome, Restore Health, and Lose Weight
- List rank#4
- Price$9.99
- Rating4.6
- Reviews4,111
-
Plant Powered Plus: Activate the Power of Your Gut to Tame Inflammation and Reclaim Your Health
- List rank#5
- Price$16.15
- Rating4.6
- Reviews435
-
The Liver Cure: Natural Solutions for Liver Health to Target Symptoms of Fatty Liver Disease, Autoimmune Diseases, Diabetes, Inflammation, Stress & Fatigue, Skin Conditions, and Many More
- List rank#6
- Price$15.48
- Rating4.5
- Reviews1,224
-
The Complete Anti-Inflammatory Diet for Beginners: A No-Stress Meal Plan with Easy Recipes to Heal the Immune System
by Dorothy Calimeris
- List rank#7
- Price$10.48
- Rating4.4
- Reviews18,450
-
The Plant Paradox: The Hidden Dangers in "Healthy" Foods That Cause Disease and Weight Gain – An NYT Bestselling Medical Nutrition Guide to Longevity and Wellness
- List rank#8
- Price$11.10
- Rating4.4
- Reviews17,214
-
When the Body Says No: Exploring the Stress-Disease Connection
- List rank#9
- Price$12.35
- Rating4.7
- Reviews2,152
-
The Complete Anti-Inflammatory Cookbook: Optimize Health, Boost Your Immune System, Promote Longevity
- List rank#10
- Price$16.43
- Rating4.3
- Reviews152
Same niche in Kindle eBooks: Immune Systems
FAQ
Is Immune Systems a good niche for Amazon KDP?
Its KDPTop opportunity score is 27/100, which makes it highly competitive. The median best seller has 658 reviews and sells for $16.64.
How many reviews do you need to rank in Immune Systems?
The median best seller has 658 reviews, and 17% of them have fewer than 100.
What do Immune Systems best sellers cost?
The median price is $16.64; half of the best sellers are priced between $13.53 and $21.41.
Can new books break into Immune Systems?
6% of the current best sellers were released in the last 90 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.