One of the most common concerns for people with ARFID — and for those who care about them — is nutrition. When your safe food list is limited, it is natural to worry about whether you are getting what your body needs. This guide addresses that concern directly: what the nutritional risks of ARFID actually are, how to assess your own nutritional status, and what practical strategies can help you meet your nutritional needs within the reality of your safe foods.
This guide is not about expanding your diet. It is about working with what you have.
ARFID does carry genuine nutritional risk, but the picture is more nuanced than "eating few foods means being malnourished." The nutritional consequences of ARFID depend heavily on which foods are in the safe food repertoire. Someone whose safe foods include a protein, a starch, and a fruit or vegetable may have a nutritionally adequate diet despite a very limited variety. Someone whose safe foods are primarily processed carbohydrates may have significant deficiencies despite adequate caloric intake.
The most commonly documented nutritional deficiencies in ARFID are:12
| Nutrient | Common Deficiency Signs | Foods That Provide It |
|---|---|---|
| Iron | Fatigue, pallor, poor concentration, brittle nails | Red meat, fortified cereals, legumes, dark leafy greens |
| Zinc | Impaired immune function, poor wound healing, taste changes | Meat, shellfish, seeds, legumes |
| Calcium | Bone density loss (long-term), muscle cramps | Dairy, fortified plant milks, broccoli, almonds |
| Vitamin D | Fatigue, bone pain, low mood | Oily fish, fortified foods, sunlight exposure |
| Vitamin B12 | Fatigue, neurological symptoms, anaemia | Animal products, fortified foods |
| Fibre | Constipation, gut microbiome disruption | Fruits, vegetables, wholegrains, legumes |
Weight status in ARFID is variable. Some individuals are underweight due to insufficient caloric intake. Others are a healthy weight or overweight, particularly if their safe foods are calorie-dense. Weight alone is not a reliable indicator of nutritional status in ARFID — blood work is required to identify deficiencies.
If you have ARFID and have not had a nutritional assessment, it is worth requesting one from your GP or primary care physician. A basic blood panel can identify the most common deficiencies and provide a baseline. Key tests to request include:
A registered dietitian experienced in ARFID can conduct a more detailed dietary assessment, including a food diary analysis, to identify specific nutritional gaps and develop a plan to address them.
For many people with ARFID, supplementation is a practical and effective way to address nutritional gaps without requiring dietary change. Supplements are not a failure — they are a tool. A multivitamin that covers common deficiencies, combined with targeted supplementation for any specific gaps identified in blood work, can significantly reduce nutritional risk while food expansion work proceeds at its own pace.
Practical considerations for supplementation in ARFID:
Form matters. Tablets, capsules, gummies, liquids, and powders all have different sensory properties. If a standard multivitamin tablet is aversive, try a gummy or liquid form. Many people with ARFID find gummy vitamins or liquid supplements more tolerable than tablets.
Taste and smell matter. Some supplements have strong tastes or smells that may be intolerable. Look for flavoured or unflavoured options and experiment with what works. Vitamin D drops, for example, are often tasteless and can be added to a safe drink.
Timing matters. Some supplements are better absorbed with food (fat-soluble vitamins A, D, E, K; iron with vitamin C), while others are better taken on an empty stomach. A dietitian or pharmacist can advise on optimal timing.
Oral nutritional supplements (ONS). For individuals with ARFID whose caloric intake is insufficient, oral nutritional supplements such as Ensure, Fortisip, or Paediasure (for children) can provide a significant proportion of daily caloric and nutritional needs in a form that many people with ARFID find acceptable. These are not just for people who are medically unwell — they are a legitimate nutritional support tool for anyone whose food intake is insufficient.
The goal of nutritional management in ARFID is not to change what you eat — it is to ensure that what you do eat is meeting your needs as well as possible, and to supplement where it is not.
Calorie density. If your safe food list is limited and you are underweight or struggling to maintain weight, focusing on calorie-dense versions of your safe foods can help. Adding butter or oil to plain starches, choosing full-fat dairy if tolerated, or adding nut butter to safe foods (if texture is acceptable) can increase caloric intake without requiring new foods.
Fortified foods. Many common foods are fortified with vitamins and minerals that are otherwise difficult to obtain from a limited diet. Fortified breakfast cereals, plant milks, and orange juice can provide iron, calcium, vitamin D, and B vitamins. Checking the nutritional labels of your safe foods may reveal that you are already getting more than you think.
Protein adequacy. Protein is essential for muscle maintenance, immune function, and overall health. If your safe foods include any animal protein (meat, poultry, fish, eggs, dairy), protein adequacy is likely not a significant concern. If your safe foods are primarily plant-based or carbohydrate-heavy, a dietitian can help identify ways to increase protein intake within your existing repertoire.
Not all dietitians are experienced in ARFID, and an ARFID-naive dietitian may inadvertently cause harm by focusing on dietary variety or "healthy eating" in ways that increase anxiety. When seeking a dietitian, look for someone who:
In the UK, Beat Eating Disorders maintains a directory of eating disorder professionals. In the US, the Alliance for Eating Disorders Awareness and NEDA provide referral resources. The ARFID Awareness organisations in the UK, US, and Australia can also provide referrals to ARFID-informed dietitians.
Białek-Dratwa A, et al. (2022). ARFID—Strategies for Dietary Management in Children. Nutrients. https://pmc.ncbi.nlm.nih.gov/articles/PMC9100178/ ↩
Ramirez Z, Gunturu S. (2024). Avoidant Restrictive Food Intake Disorder. StatPearls. https://www.ncbi.nlm.nih.gov/books/NBK603710/ ↩