
Dr. Jennifer Gaudiani’s first book, Sick Enough became one of the most influential medical texts on eating disorders for a mixed audience of clinicians, patients and families. Her recent Second Edition considerably expands its reach. It is broader in diagnostic scope, more explicit in its rejection of weight stigma, and more attentive to populations historically marginalized within eating disorder discourse, patients in larger bodies, those with ARFID or atypical anorexia, athletes, neurodivergent individuals and others.
The second edition is a substantial, clinically ambitious and humane book. This is an updated guide with a wealth of information for patients, families, and clinicians. It has an expanded coverage of weight-inclusive care, “unmeasurable” medical problems such as Positional Orthostatic Tachycardia Syndrome (POTS) and Mast Cell Activation Syndrome (MCAS) and includes specific populations such as athletes, people in perimenopause, and those with PTSD or ADHD.
Its table of contents also shows a broader scope than a narrow anorexia only manual. The Second Edition covers purging, BED, ARFID, atypical anorexia, recovery and several special populations.
It is one of the strongest medically oriented eating disorder books for a mixed audience. Especially if the reader wants a text that combines clinical seriousness with anti-stigma framing. Its greatest strength is that it repeatedly emphasizes that eating disorders are medically dangerous across body sizes and presentations. However, one of its limitations is that it can be too expansive, too clinician-shaped, and at times too structurally diffuse for readers who want either a purely patient facing guide or a tightly organized medical handbook.
What the book does very well
The Second Edition directly attacks the “not sick enough” myth. This is the book’s central moral and medical achievement. Dr. Gaudiani makes the case that eating disorders are not validated by emaciation alone and that serious risk can exist in larger bodies, in atypical anorexia, in purging disorders, and in undernutrition that is not socially legible. The Second Edition’s explicit emphasis on weight stigma and weight inclusive philosophy is one of its defining strengths.
That matters because many books on eating disorders still smuggle in a hierarchy of seriousness. Sick Enough pushes against that hierarchy. It is corrective in the best sense, not merely compassionate, but clinically corrective.
The book also bridges medicine and lived experience better than most clinician authored books. The book emphasizes case presentations, stories, metaphors, practical strategies, and approachable science. That combination seems to be the key to the book’s reputation. An independent professional reviewer noted that Dr. Gaudiani combines expertise with a compassionate tone and keeps the book accessible without drowning newer readers in jargon.
This is important because eating disorder medicine can quickly become alienating. A text can be medically accurate yet useless to frightened patients or exhausted families. Dr. Gaudiani appears to avoid that trap by translating physiology into understandable language without trivializing it.
The table of contents shows a book that does not stop at restrictive anorexia. It includes chapters on purging, BED, ARFID, atypical anorexia, recovery, neurodiversity, diabetes, athletes/REDs, males, gender and sexual minorities, sexual and reproductive health, substance use, older age, and gastrointestinal or autonomic complications.
That breadth makes it unusually useful in real world practice where some patients rarely present as textbook stereotypes. The Second Edition seems designed to reflect the heterogeneity of eating disorders rather than forcing everyone into one familiar clinical script.
The Second Edition explicitly includes a section on “The Unmeasurables,” including MCAS and POTS. Whether every reader will agree with the framing, this signals one of the book’s core virtues. It approaches in a professional manner, the messy borderlands of eating disorder medicine where symptoms may be debilitating even when medicine has not produced neat explanatory boxes.
That gives the book emotional and clinical credibility. Patients with complicated, long-standing illness often feel erased by handbooks that only recognize what fits clean laboratory or diagnostic boundaries.
A number of medical treatises are technically solid but ethically thin. Sick Enough seems to understand that care is not just about identifying bradycardia, electrolyte derangement, endocrine suppression, or GI dysfunction. It is also about how bias delays treatment. The weight stigma material is not simply ornamental. That makes the book more than a manual. It is also an intervention into how clinicians think.
Room for Improvement or Greater Clarity
As with all books, papers, studies and treatises there are areas for greater explanation and clarity.
The organization of the Second Edition may frustrate readers who want a classic systems-based handbook. One independent review from a dietitian praised the book but made a sharp structural criticism, that it did not organize material primarily by body system, so a reader trying to track for example, cardiovascular or GI consequences across diagnoses may need to jump between chapters.
That is a meaningful weakness. For a clinician in a hurry or a student trying to build a clean mental map, a systems based structure can be more efficient. Dr. Gaudiani’s presentation-by-presentation approach may feel more human and clinically realistic, but it is not always the fastest for cross-referencing.
The Second Edition also may be too medical for some patients and too general for some specialists. This is a classic hybrid text problem. By trying to serve patients, loved ones, and clinicians at once, the book likely lands a little imperfectly for each subgroup. For patients early in illness or recovery, the sheer amount of medical detail may feel overwhelming. For subspecialists already steeped in eating disorder medicine, some sections may read as broad synthesis rather than cutting edge dispute. That does not make the book weak. It makes it broad. But broad books inevitably trade some depth for reach.
One of Dr. Gaudiani’s strengths is having a strong clinical voice. The downside of that voice, in any physician authored guide, is that it can sometimes produce a subtle asymmetry. The reader is being expertly guided, but nonetheless guided. For some readers, especially those wary of medical paternalism, this can feel comforting; for others, it can feel managed.
There are also some topic choices which may invite debate. [Debate has never been a weak spot for Dr. Gaudiani.] The inclusion of conditions such as MCAS and POTS under “unmeasurables” will resonate deeply with some readers and prompt skepticism from others, especially readers sensitive to how contested syndromes are discussed in medicine.
That is not necessarily a flaw. But it does mean the book is not purely conservative in scope. It steps into areas where interpretation, causality, and framing are complicated. Some will see that as brave and patient honoring. Others will worry it risks overextension.
Sick Enough does underscore the lethality of eating disorders and makes clear that anorexia nervosa carries the highest mortality rate of any psychiatric illness, citing markedly elevated death rates relative to healthy peers and a significant contribution from suicide. However, the book does not organize this point as a sustained comparative analysis across diagnoses. Instead, it embeds the explanation within its broader medical framework. The cumulative effects of prolonged undernutrition, multi-system physiological deterioration, and heightened suicide risk. In this way, Dr. Gaudiani establishes the mortality hierarchy clearly, but explains it implicitly through the biology of starvation and clinical risk rather than through a dedicated, diagnosis-by-diagnosis examination of mortality mechanisms.
The best features and biggest improvements in the Second Edition appear to be: a stronger emphasis on weight stigma and weight-inclusive care; broader recognition of ARFID, atypical anorexia, BED, and diverse patient groups; added treatment of neurodiversity and psychiatric complexity; inclusion of POTS, MCAS, and complex digestive issues, and; more explicit attention to athletes, males, gender/sexual minorities, sexual and reproductive health, and older adults.
That is exactly the sort of expansion a Second Edition should make. Not just “more studies,” but a wider and more current model of who gets sick and how illness presents. The Second Edition may be structurally imperfect as a reference manual, occasionally vulnerable to being too broad for specialists and too dense for lay readers, and open to debate in some of its more complex “unmeasurable” territory.
However, it is authoritative, compassionate, modern in its anti-stigma stance, broad in diagnostic scope, and far better than most medical books at explaining why a person can be very ill without “looking sick.” It seems especially strong on translating eating disorder medicine into language usable by non-specialists.
Although not flawless, [what book is?] it is the kind of book that can genuinely change how people understand eating disorders: medically, morally, and diagnostically.
That is rare.
Which makes the Second Edition a must read for medical and mental health professionals and not just those in the eating disorder community.





