Why do I need this report?

Being underweight isn’t always just “fast metabolism” or “not eating enough.” Genetics can influence appetite cues, energy expenditure, nutrient handling, and how your body responds to diet and exercise—factors that can make weight gain feel unusually difficult. This report helps you understand your personal genetic contributors so you can focus on strategies most likely to work for you, while also highlighting when unexpected weight loss or symptoms warrant a conversation with a healthcare professional.

Why is this report unique?

This report is built on a broad genetic review—1665 variants analyzed—to capture multiple biological drivers related to low body weight, from appetite and metabolism to nutrition-linked pathways. Instead of generic tips, you receive 8 personalized recommendations that translate your DNA insights into clear next steps across diet, lifestyle, and supplements.

How is the recommendations list built?

Your recommendations are generated by evaluating which genetic variants you carry, the direction and magnitude of their known associations (e.g., appetite regulation, energy use, nutrient needs), and the strength of supporting scientific evidence. Actions are then prioritized by potential impact and practicality, so the final list focuses on the most relevant, evidence-aligned changes for your profile—organized into dietary, lifestyle, and supplement options you can implement step-by-step.

What are the health risks of being underweight?

While mild thinness may not be harmful for everyone, being significantly underweight can increase the risk of malnutrition and nutrient deficiencies, decreased immune function, fatigue, anemia, bone and joint issues, hair loss or dry/thinning skin, and reproductive impacts such as irregular periods and fertility challenges. In children and teens, it may also contribute to slow or impaired growth. This report focuses on genetic factors that may contribute to low body weight and provides personalized actions to support healthier weight gain and nutritional status.

How can I gain weight in a healthy way if I’m underweight?

Healthy weight gain typically emphasizes increasing calorie intake without sacrificing nutrient quality, and supporting muscle gain rather than relying on ultra-processed calories. Common evidence-based approaches include eating 5–6 smaller meals or snacks per day, choosing calorie-dense and nutrient-rich foods (balanced proteins, carbohydrates, and healthy fats), using smoothies or shakes to add calories when appetite is low, timing fluids so they don’t reduce meal intake, and incorporating strength training to build lean mass and stimulate appetite. The DNA report personalizes these strategies based on your genetics—helping you prioritize the dietary patterns, lifestyle habits, and supplement options most relevant to your biology.

Save $30

Underweight

Rated 4.70 out of 5 based on 10 customer ratings

4.7 (11 reviews)

Underweight

Rated 4.70 out of 5 based on 10 customer ratings

4.7 (11 reviews)

The report provides up to 8 personalized recommendations based on over 1,665 genetic variants analyzed. Purchase a DNA kit to generate your genetic results. If you've already got one, you're all set to continue. View sample report.

$59

$29

Save $30

Add to cart Added

Trusted by 200,000+ users & 2,000+ doctors

Proven track record: 3+ million analyses delivered

Analyzes 1,665 Genetic Variants

Up to 8 DNA-Based, Science-Backed Recommendations

Underweight

$59 $29

Add to cart Added

Product features

Note: To generate your personalized report, purchase a SelfDecode DNA kit. If you already have one, you’re ready to proceed.

Understanding Your Underweight Risks: A DNA-Based Report

Do you struggle to gain weight even when you feel like you’re eating enough? Are you often tired, getting sick more easily, or noticing hair, skin, or menstrual changes that make you wonder if your weight is affecting your health? If being “naturally thin” runs in your family—or unexplained weight loss has you concerned—your DNA can help clarify what may be influencing your appetite, metabolism, and nutrient needs.

Key Report Highlights

The Underweight DNA Report analyzes 1665 genetic variants (SNPs) linked to body weight regulation, metabolism, appetite signaling, and nutrition-related pathways—then translates your results into 8 targeted, actionable recommendations. A key health fact: a BMI under 18.5 is generally considered underweight, and severe underweight is associated with risks like malnutrition, weakened immune function, anemia, and fertility or menstrual irregularities—making early, personalized support especially important.

Personalized, Actionable Recommendations

Your results are used to generate personalized dietary, lifestyle, and supplement recommendations tailored to your genetic tendencies and goals—so you can gain weight in a healthier, more sustainable way. Depending on your profile, your plan may include dietary guidance such as increasing calorie density with nutrient-rich fats and proteins (e.g., adding olive oil, nut butters, or full-fat dairy where appropriate), lifestyle strategies like strength training to promote lean mass and stimulate appetite, and supplement considerations to support gaps that can accompany low intake (for example, targeted micronutrients commonly linked to fatigue or low appetite when appropriate).

User-Friendly Format and Trust

The user-friendly format of this report emphasizes clarity, offering practical, easy-to-follow insights to integrate seamlessly into your lifestyle. Whether you’re a novice or seasoned biohacker, you’ll find the layout accessible and the information straightforward.

This report is grounded in the latest scientific research and trusted by over 150,000 users and 1,000+ doctors worldwide. It’s not only comprehensive but also complies with stringent privacy laws, being HIPAA and GDPR compliant.

Getting Started

Ready to unlock the secrets within your DNA? Purchase a DNA kit for an easy at-home collection process and gain the insights you need for a proactive, personalized approach to wellness. Don’t wait—take the first step to understanding your health today.

Product FAQs

: Being underweight isn’t always just “fast metabolism” or “not eating enough.” Genetics can influence appetite cues, energy expenditure, nutrient handling, and how your body responds to diet and exercise—factors that can make weight gain feel unusually difficult. This report helps you understand your personal genetic contributors so you can focus on strategies most likely to work for you, while also highlighting when unexpected weight loss or symptoms warrant a conversation with a healthcare professional.
: This report is built on a broad genetic review—1665 variants analyzed—to capture multiple biological drivers related to low body weight, from appetite and metabolism to nutrition-linked pathways. Instead of generic tips, you receive 8 personalized recommendations that translate your DNA insights into clear next steps across diet, lifestyle, and supplements.
: Your recommendations are generated by evaluating which genetic variants you carry, the direction and magnitude of their known associations (e.g., appetite regulation, energy use, nutrient needs), and the strength of supporting scientific evidence. Actions are then prioritized by potential impact and practicality, so the final list focuses on the most relevant, evidence-aligned changes for your profile—organized into dietary, lifestyle, and supplement options you can implement step-by-step.
: While mild thinness may not be harmful for everyone, being significantly underweight can increase the risk of malnutrition and nutrient deficiencies, decreased immune function, fatigue, anemia, bone and joint issues, hair loss or dry/thinning skin, and reproductive impacts such as irregular periods and fertility challenges. In children and teens, it may also contribute to slow or impaired growth. This report focuses on genetic factors that may contribute to low body weight and provides personalized actions to support healthier weight gain and nutritional status.
: Healthy weight gain typically emphasizes increasing calorie intake without sacrificing nutrient quality, and supporting muscle gain rather than relying on ultra-processed calories. Common evidence-based approaches include eating 5–6 smaller meals or snacks per day, choosing calorie-dense and nutrient-rich foods (balanced proteins, carbohydrates, and healthy fats), using smoothies or shakes to add calories when appetite is low, timing fluids so they don’t reduce meal intake, and incorporating strength training to build lean mass and stimulate appetite. The DNA report personalizes these strategies based on your genetics—helping you prioritize the dietary patterns, lifestyle habits, and supplement options most relevant to your biology.

WHY SELFDECODE?

Empowering Your Well-being Journey

This personalized health report is powered by SelfDecode's cutting-edge AI technology, designed to unlock a deeper understanding of your health potential. We're committed to providing you with the most accurate and actionable insights to guide your well-being journey.

Most Accurate
Polygenic Risk Scoring

We leverage cutting-edge algorithms and analyze a massive dataset of 2 million people to deliver the most precise assessment of your genetic health predispositions. Our advanced approach takes into account your ancestry - which is often overlooked by other methods - to provide you with the most accurate risk assessment. This ensures that the risk scores you receive are based on the latest scientific evidence and are truly personalized to your genetic makeup.

Cutting-Edge AI &
Machine Learning

We have invested 20 million dollars developing our AI and machine learning models. Our patent-pending technology provides you with the most personalized health insights and recommendations by taking into account your unique DNA, lifestyle, labs, symptoms, conditions and health goals. This empowers you to make informed decisions tailored to your specific needs.

Analyzes 200 Million Variants & Sophisticated Recommendation Engine

We go beyond the basics by analyzing a staggering 200 million genetic variants to provide the most comprehensive picture of your health potential. Our sophisticated recommendation engine leverages this deep analysis to provide personalized and actionable insights to optimize your well-being journey.

Built by Leading
Scientists & Engineers

A dedicated team of over 60 scientists and engineers is continuously innovating and developing our technology, ensuring it remains at the forefront of personalized health.

Reviews

Rated 4.70 out of 5 based on 10 customer ratings

4.7 (11 reviews)

Share your thoughts

If you've used this product, share your thoughts with other customers

Only customers who purchased this product can leave reviews

Samantha M.

Rated 5 out of 5
I finally understand why gaining weight is hard for me. The suggestions felt doable and I already started changing my meals.
Ananya N.

Rated 5 out of 5
I felt so much better after reading my results. It was reassuring to see what my DNA says about being underweight.
Ramon V.

Rated 5 out of 5
I usually search endlessly online for health tips, but this gave me real answers based on my DNA. The recommendations actually made sense and were not just general advice. I finally got some specifics to work with that I don’t usually get from blogs or random articles.
Brittany N.

Rated 5 out of 5
I’ve been underweight my whole adult life, and I always assumed it was just stress and a fast metabolism. The Underweight report was the first thing that gave me a structured plan tied to my genetics. It explained why I may struggle to add lean mass and pointed me toward strength training and power training instead of endless cardio. I also appreciated the supplement section, creatine and HMB were laid out with practical cautions. After six weeks of lifting with progressive overload, my weight finally moved up, and my clothes fit better.
Nicole S.

Rated 4 out of 5
Got this because my younger brother has always been skinny and nothing seemed to help. The info was good, but I wish there were more food ideas and maybe more support for beginners. Still, we learned a lot about what he can try now.

1 2 3

Underweight

Product features

Understanding Your Underweight Risks: A DNA-Based Report

Key Report Highlights

Personalized, Actionable Recommendations

User-Friendly Format and Trust

Getting Started

Product FAQs

Why do I need this report?

Why is this report unique?

How is the recommendations list built?

What are the health risks of being underweight?

How can I gain weight in a healthy way if I’m underweight?

WHY SELFDECODE?

Empowering Your Well-being Journey

Most AccuratePolygenic Risk Scoring

Cutting-Edge AI &Machine Learning

Analyzes 200 Million Variants & Sophisticated Recommendation Engine

Built by Leading Scientists & Engineers

Reviews

Related Products

Most Accurate
Polygenic Risk Scoring

Cutting-Edge AI &
Machine Learning

Built by Leading
Scientists & Engineers