When eating full meals feels difficult, maintaining calorie intake can become a real challenge. This can happen during illness, recovery, medical treatment, periods of high physical demand, or any situation where appetite is reduced and finishing meals feels overwhelming.
In this guide
• Why high-calorie foods help when eating is difficult
• Examples of high-calorie foods that are easier to eat
• Low-volume foods that provide more calories
• Practical strategies when eating feels difficult
• Supporting calorie intake during periods of low appetite
• Frequently asked questions
About this Guide
This page provides general information about maintaining calorie intake when appetite is low or when eating full meals is difficult.
Phoenix Bars are a food product designed to provide a compact, high-calorie option in situations where maintaining calorie intake is challenging. They are not a medical treatment.
Individuals undergoing medical treatment or managing diagnosed eating disorders should always seek advice from a qualified healthcare professional when making dietary decisions.
Last reviewed: 2026
Who this guide may help
This guide is designed for people who are finding it difficult to eat enough food to meet their calorie needs.
This may include individuals experiencing:
• reduced appetite during illness or recovery
• appetite changes during medical treatment
• unintentional weight loss
• fatigue that makes eating large meals difficult
• situations where calorie intake needs to be maintained despite low appetite
In these situations, focusing on high-calorie foods that provide more energy in smaller portions can help maintain daily calorie intake without relying on large meals.
This guide explains practical examples of calorie-dense foods, strategies for eating when appetite is low, and compact options that can help support energy intake when eating full meals is difficult.
Individuals undergoing medical treatment or managing diagnosed eating disorders should always make dietary decisions in consultation with a qualified healthcare professional.
Why high-calorie foods help when eating is difficult
When appetite is low, the main limitation is often food volume rather than calorie needs.
Your body may still require the same amount of energy each day, but your appetite may only allow you to eat smaller portions.
High-calorie foods help by:
• providing more energy in smaller amounts of food
• making snacks more nutritionally effective
• reducing pressure to eat large meals
• helping maintain body weight and energy levels
This approach is often described as choosing calorie-dense foods, meaning foods that provide a high number of calories relative to their size.
Examples of high-calorie foods that are easier to eat
When eating is difficult, softer foods, snack foods, and compact foods are often easier to manage than large meals.
Examples of calorie-dense options include:
High-energy snacks
• energy-dense nutrition bars
• nut butters
• chocolate and confectionery
• dried fruit and nuts
• biscuits or snack foods
Soft or low-effort foods
• yoghurt or custard
• smoothies and milk-based drinks
• soups with added ingredients
• mashed or blended foods
Fortified foods
Adding calorie-dense ingredients to existing meals can increase energy intake without increasing portion size.
Examples include:
• oils or butter added to meals
• nut butters stirred into porridge or smoothies
• cream or full-fat dairy added to soups or sauces
For a more structured approach to this method, see our guide on Food Fortification (Food First).
Low-volume foods that provide more calories
For people who struggle to eat large portions, foods that deliver more calories in smaller volumes are often the most practical option.
These foods are typically:
• compact
• energy dense
• easy to eat gradually
• convenient to consume between meals
This approach allows people to increase calorie intake without relying entirely on traditional meal sizes.
Compact high-calorie foods
In situations where preparing or finishing meals is difficult, compact food options can help maintain energy intake.
Phoenix Bars are high-calorie nutrition bars designed to provide a compact and calorie-dense food option when eating full meals is difficult.
Because they are concentrated sources of calories, they can be eaten in small portions or gradually throughout the day, which some people find easier than finishing larger meals.
Phoenix Bars are a food product rather than a medical treatment and may be used as part of a broader dietary approach when maintaining calorie intake is important.
Practical strategies when eating feels difficult
Small practical adjustments can make eating easier when appetite is unreliable.
Many people find the following strategies helpful:
Eat smaller portions more frequently
Rather than relying on three meals per day, smaller snacks throughout the day can feel more manageable.
Choose calorie-dense foods
Foods that deliver more calories per bite can help maintain energy intake even when appetite is limited.
Keep convenient options nearby
Ready-to-eat snacks make it easier to eat when appetite briefly returns.
Reduce pressure around meals
Eating small amounts consistently is often more effective than trying to finish large meals.
Supporting calorie intake during periods of low appetite
Maintaining calorie intake when eating is difficult often requires a combination of strategies:
• choosing high-calorie foods
• eating smaller portions more often
• fortifying meals where possible
• using convenient snack options
For a broader explanation of appetite loss and strategies to maintain calorie intake, see our guide on Low Appetite and Difficulty Eating Enough Calories.
About Flaming Phoenix
Flaming Phoenix develops high-calorie nutrition bars designed for situations where maintaining energy intake is difficult.
Phoenix Bars are used by endurance athletes, expedition teams, and individuals who require compact, calorie-dense food when eating full meals is challenging.
Each Phoenix Bar provides over 550 calories in a compact format and can be eaten gradually throughout the day when appetite is limited.
Availability
Phoenix Bars can be ordered across the UK, Canada and Europe, including the Netherlands, France, Belgium and Germany.
Real Experiences When Eating Full Meals Was Difficult
When people struggle with full meals, the most useful feedback tends to focus on calorie density, ease of eating, and being able to take in meaningful energy in small amounts.
“Phoenix Bars helped me to consume more calories during treatment for my medical condition. They are low volume, weren’t too sweet, easy to digest.”
“During my eating disorder, these bars were one of the few food sources I found palatable, tasty and fulfilling.”
“I really enjoyed Phoenix Bars in the Alps and it gave him a boost of energy on long days. Tasty and not too stodgy or sickly like protein bars often can be.”
