The "Hidden Hunger" I Discovered from My Health Check Report
A few days ago, I got my health check report, and one line in red stood out: "Low ferritin." The doctor said it wasn't a big deal—just take some iron supplements. But I couldn't help feeling uneasy: I eat pretty healthily normally, so why would I be iron deficient? What are the symptoms of iron deficiency? Could I be deficient in other things too? I searched online for hours, and the more I looked, the more anxious I became—vitamin D, B12, folic acid, zinc... it felt like a minefield.
Just then, I happened to be tinkering with the Clawic platform and discovered a skill called Nutrition. It felt like it was designed specifically for someone like me. After installing it and giving it a try, I found that it can systematically analyze what you're lacking and how to supplement—and it places a strong emphasis on safety. It automatically reads your health profile for allergies, diseases, and medication information to avoid recommending conflicting items. That's way more reliable than my own wild guesses.
What Can This Skill Actually Do?
To be serious, this Nutrition skill is not a "what to eat today" recipe tool; it's a micronutrient detective. You tell it what you've eaten, what symptoms you have, or simply input the values from your lab report, and it can determine which nutrients you might be deficient in, then provide specific food sources and supplement recommendations, including dosage, form, and upper limits. If a food or supplement conflicts with a medication you're taking, it will warn you. For example, if you're on warfarin and planning to take a lot of vitamin K, it will definitely tell you not to.
The dietary patterns it supports for evaluation are quite comprehensive:
- Vegetarian, vegan (prone to deficiencies in B12, iron, zinc, calcium, iodine, DHA)
- Ketogenic (prone to deficiencies in magnesium, potassium, B vitamins, fiber)
- Gluten-free (may lack B vitamins, iron, fiber)
- Low FODMAP (may lack calcium, vitamin D, B vitamins)
- DASH (generally balanced, but salt-sensitive people need caution)
- Mediterranean diet (overall very healthy, but some may lack iron, iodine)
It also pays special attention to special populations: pregnant women need folic acid, iron, iodine; elderly people are prone to B12, D, calcium deficiencies; celiac disease patients often lack iron, calcium, B vitamins; kidney disease requires controlling phosphorus and potassium; IBD patients have poor absorption and are prone to various deficiencies; those who have undergone bariatric surgery have altered absorption and need monitoring. In short, it covers all aspects.
My Actual Experience Using It
Installation is quite simple—just open a terminal and run one command:
npx skills add https://github.com/clawic/skills --skill nutritionThen the system automatically downloads the files to your ~/Clawic/data/nutrition/ directory. Before first use, it's best to create a config.yaml file with your basic settings (e.g., units, region), and fill in your allergies, diseases, and medications in ~/Clawic/data/health/profile.md. Only then can the skill give safe recommendations.
Once, I tried analyzing my monthly diet records (rough estimates), and it immediately pointed out that my vitamin D intake was insufficient—because I don't get much sun and my food doesn't provide enough D. It then recommended supplementing 400–800 IU per day, and reminded me not to exceed the safe upper limit of 4000 IU. Since I'm on blood pressure medication, it also checked for interactions. It was much more meticulous than I expected.
Another very practical feature: reading food labels. Nowadays, supermarkets are full of "high calcium" and "high protein" gimmicks. This skill directly helps me parse %DV and NRV, so I know what those numbers actually mean. For example, a so-called "high-protein yogurt"—it calculated that the protein content was actually mediocre, yet the price was double. I decisively passed on it.
A Few Points to Note (Rant with Caution)
However, no tool is perfect. This skill explicitly states that it does not handle calories or macronutrients (carbs, protein, fat), nor does it provide recipes or diet diaries. So if you're looking to lose weight, gain muscle, or need a detailed meal plan, you'll need to pair it with other skills (like calories, meals, etc.). Also, it does not cover hydration or fasting management—issues like drinking too little water or keto fasting should be handled by specialized skills.
Another small pitfall I encountered: it requires data to be placed under ~/Clawic/data/nutrition/. If you had old files in ~/nutrition/ or ~/clawic/nutrition/, it will automatically migrate them, but it outputs a message telling you where it moved them from. The first time I didn't notice, thought I had lost my data, and searched everywhere until I found it had been moved. If you encounter a similar situation, don't panic—just check the terminal output.
The Best Part: It's Local
What reassures me most is that all data is stored locally. It never sends anything to an external server, and it certainly doesn't store your passwords or login credentials. If you paste in lab reports or exported data from apps that might contain a membership ID or token, it automatically replaces them with placeholders (e.g., keychain:labcorp-portal) before writing, and prompts you. So even if the file is lost, others will only get placeholders that can't be used directly. This is extremely important for health data privacy.
In summary, this Nutrition skill is definitely a great tool for anyone who cares about their nutritional status, wants to take supplements scientifically, or has chronic conditions requiring dietary management. It doesn't just recommend the most expensive supplements like some apps do; it gives reasonable suggestions based on your actual data. Plus, it's free, open-source, runs locally, and has no tricks. If you're using Clawic, I highly recommend giving it a try.
