<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>robocat</author><text>You could do that, but it is dangerous to do so during an epidemic.&lt;p&gt;Having body fat helps you if you get very sick. Having low body fat means you are at a higher risk of death when your body has to fight off disease. Being very underweight increases your risk of catching diseases.&lt;p&gt;Of course, being excessively obese has other risks.&lt;p&gt;I am not a doctor (although anyone blindly following internet advice needs to be careful!)</text><parent_chain><item><author>Mountain_Skies</author><text>If you have a way of measuring your body fat to a reasonable degree of accuracy, you can ration your food by knowing how much stored body fat your body can convert into energy per day. Your body can convert roughly 0.9% of your body fat into energy in a day. So if you&amp;#x27;re 180lbs with 33% body fat, you have 60 lbs of fat on you. You should be able to convert ~0.54lbs into energy, which at ~3500 kcal per lbs comes out to 1890 kcal being the maximum calorie deficit you can overcome with just stored body fat. Subtract that from your daily calorie expenditure (another messy estimate) to get how many calories you need to consume to avoid muscle breakdown and energy crashes.&lt;p&gt;Keep in mind that every person&amp;#x27;s body and metabolic system is unique so you&amp;#x27;ll want to put in a generous error buffer. I&amp;#x27;d cut the calorie deficit by half, at least to start with. Also notice that each day your total stored body fat will be less, so the number of calories your body can extract from that stored fat will also be less.&lt;p&gt;Source: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.ncbi.nlm.nih.gov&amp;#x2F;pubmed&amp;#x2F;15615615&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.ncbi.nlm.nih.gov&amp;#x2F;pubmed&amp;#x2F;15615615&amp;#x2F;&lt;/a&gt;</text></item></parent_chain></comment><story><title>Eat for $1.50 per Day – Layoffs, Coronavirus Quarantine, Food Shortages</title><url>https://efficiencyiseverything.com/eat-for-1-50-per-day-layoffs-coronavirus-quarantine-food-shortages/</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>johntiger1</author><text>Are you certain it only subtracts from fat? From my understanding, you will also lose muscle too (especially without exercise)</text><parent_chain><item><author>Mountain_Skies</author><text>If you have a way of measuring your body fat to a reasonable degree of accuracy, you can ration your food by knowing how much stored body fat your body can convert into energy per day. Your body can convert roughly 0.9% of your body fat into energy in a day. So if you&amp;#x27;re 180lbs with 33% body fat, you have 60 lbs of fat on you. You should be able to convert ~0.54lbs into energy, which at ~3500 kcal per lbs comes out to 1890 kcal being the maximum calorie deficit you can overcome with just stored body fat. Subtract that from your daily calorie expenditure (another messy estimate) to get how many calories you need to consume to avoid muscle breakdown and energy crashes.&lt;p&gt;Keep in mind that every person&amp;#x27;s body and metabolic system is unique so you&amp;#x27;ll want to put in a generous error buffer. I&amp;#x27;d cut the calorie deficit by half, at least to start with. Also notice that each day your total stored body fat will be less, so the number of calories your body can extract from that stored fat will also be less.&lt;p&gt;Source: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.ncbi.nlm.nih.gov&amp;#x2F;pubmed&amp;#x2F;15615615&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.ncbi.nlm.nih.gov&amp;#x2F;pubmed&amp;#x2F;15615615&amp;#x2F;&lt;/a&gt;</text></item></parent_chain></comment><story><title>Eat for $1.50 per Day – Layoffs, Coronavirus Quarantine, Food Shortages</title><url>https://efficiencyiseverything.com/eat-for-1-50-per-day-layoffs-coronavirus-quarantine-food-shortages/</url></story>