Why diets work for everyone but you. Why weight loss is personal. Decoded.
It isn't willpower. It isn't the latest plan. It's FTO — how loudly your body signals fullness — TCF7L2, how you handle carbs, APOA2, how you respond to fat, and forty others. The wiring behind which eating pattern your body is actually built to respond to is finally readable.
It isn't willpower. It's the appetite, metabolism, and macronutrient-response genes you were born with.
Two people follow the identical plan. One drops weight steadily; the other barely moves — same effort, same food, different result. The difference is rarely discipline. It's the genetic wiring that decides how your body handles carbs and fat, how loudly it signals fullness, and which eating pattern it actually rewards. Finally a way to read it.
Does your body respond better to fewer carbs — or less fat?
This is the single biggest reason one diet works and another doesn't. Nutrigenomics describes two broad response styles. The Carb-Sensitive type (FTO and TCF7L2 variants affecting how you handle carbohydrate and blood sugar) tends to lose weight and feel better on lower-carb, higher-protein-and-fat patterns. The Fat-Sensitive type (APOA2 and FABP2 variants affecting how you process dietary fat) tends to do better moderating fat. Neither is "the right diet" — it's about matching your plate to your wiring instead of the trend of the moment. This is about personalization and what's sustainable for you, never restriction.
The carb-sensitive architecture.
Carb-sensitive metabolisms carry FTO and TCF7L2 variants linked to a stronger blood-sugar swing after carbohydrate-heavy meals and softer satiety signaling — so refined carbs can leave you hungry again sooner and a little foggy. The good news is the clarity it brings: your body tends to respond well to patterns built around protein, healthy fats, fiber, and slower-digesting carbohydrates, with steadier energy as the reward. The strategies that fit: prioritizing protein and fiber, choosing whole over refined carbs, and pairing carbs with protein or fat to soften the curve. Always built around nourishment, never restriction.
43 genetic traits. Six categories. The complete map of how your body loses weight.
Every dot is one trait we decode. How you respond to carbs, fat, and protein, your metabolism and how your body stores and burns energy, your appetite and satiety signaling, the foods you react to, the nutrients your body needs, and the eating-behavior tendencies written into your genes — together they form the architecture behind why weight loss looks different for you than for anyone else.
Your complete weight-loss map
Six categories. Forty-three traits. One DNA sample. Every dimension of how your body responds to carbs and fat, manages metabolism and energy storage, signals hunger and fullness, reacts to foods, and what it needs to run well — decoded once and yours forever.
Six revelations hiding in your weight-loss genome.
Hover (or tap) to flip each card. These are real examples of the kind of insight your test will deliver — built from peer-reviewed nutrigenomics research.
Why is hunger louder for you than for others?
Hover to reveal →Appetite Signaling (FTO)
FTO is the most-studied gene linking genetics to appetite, eating behavior, and body weight. Certain variants are associated with softer satiety signaling — the "I'm full" message arriving a little later and quieter — and a stronger pull toward energy-dense foods. This isn't about willpower; it's wiring. Knowing your FTO profile reframes hunger as biology you can work with, pointing toward the habits that support steadier appetite — protein-forward meals, fiber, good sleep, and structure — a kinder, more effective approach than fighting yourself.
When does your body actually feel full?
Hover to reveal →Satiety Response (MC4R)
MC4R sits at the center of the brain's appetite-control system — the pathway that decides how strongly you register fullness and regulate energy balance. Variants here are among the most robust genetic links to appetite and body weight known to science. Knowing your MC4R profile helps explain why portion sizes that satisfy others may leave you wanting more, and why strategies built around protein, fiber, and meal structure tend to work better for you than relying on willpower alone.
Do carbs work for you — or against you?
Hover to reveal →Carbohydrate Response (TCF7L2)
TCF7L2 is one of the strongest known genetic influences on how your body handles carbohydrate and blood sugar. Certain variants are linked to a sharper blood-sugar swing after carb-heavy meals — the spike-then-crash that leaves you foggy and hungry again sooner. Knowing your TCF7L2 status is a direct clue to whether a lower-carb, protein-and-fiber-forward pattern is likely to feel and work better for you, or whether your body handles whole carbohydrate comfortably. It's the genetics behind "carbs make me gain" vs "carbs are fine for me."
Does dietary fat help you — or hold you back?
Hover to reveal →Dietary-Fat Response (APOA2)
APOA2 is a landmark gene in nutrigenomics for one striking reason: in carriers of a particular variant, higher intake of saturated fat has been associated with higher body weight — while in non-carriers, the same fat intake shows much less of that effect. In other words, the same buttery, fat-rich meal can affect two people very differently. Knowing your APOA2 status is one of the clearest signals of whether your body is "fat-sensitive" and likely to do better moderating saturated fat, or whether it handles fat comfortably.
How readily does your body burn energy?
Hover to reveal →Metabolism & Thermogenesis (UCP1)
UCP1 helps govern thermogenesis — how your body turns energy into heat rather than storing it. Variants here are studied for their links to resting energy expenditure and how efficiently the body uses fuel. Alongside ADRB2 and ADRB3 (which influence fat mobilization), these markers offer a window into why progress can feel faster for some and slower for others on the very same effort. It's framed as self-knowledge — context for patience and realistic expectations, not a verdict, since activity, sleep, muscle, and habits all matter enormously.
Why does coffee hit you the way it does?
Hover to reveal →Caffeine Metabolism (CYP1A2)
CYP1A2 controls how quickly your liver clears caffeine — the stimulant in coffee, tea, and many energy and "fat-burner" products. Fast metabolizers process it efficiently; slow metabolizers feel it harder and longer, with jitters, a racing heart, or wrecked sleep from a single late cup. Since poor sleep quietly undermines appetite control and weight management, knowing your CYP1A2 type tells you, at a genetic level, how much caffeine actually suits you — and when to call it a day.
Losing weight for your body, not someone else's.
A meaningful share of how you respond to food, how loudly you feel hunger, and how readily your body stores and releases energy is wiring you didn't pick. The rest is the pattern you choose, the habits you keep, and the professionals you lean on. Personalized nutrition is where the two start working together.
A snapshot of how your body loses weight.
Five questions across five dimensions. We'll give you a composite weight-loss-fit score and a directional archetype. The exact genetic shape — the one your DNA reveals — is what the full test unlocks. This is a reflective snapshot, not medical, dietary, or weight-loss advice.
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Four steps. No lab visit. No appointment.
A cheek swab from your kitchen. A prepaid mailer. A secure portal. That's the whole experience.
Order Online
Secure checkout. We ship your DNA collection kit to your door in 5–7 business days.
Swab at Home
A simple cheek swab. Two minutes. No needle. No appointment. No discomfort.
Mail It Back
Use the prepaid mailer. Drop it in any USPS box. We handle the rest from there.
Read Your Profile
3–4 weeks later, your full weight-loss optimization report arrives via the secure portal.
A working manual for the body you're actually trying to change.
Not generic diet advice. Not whatever plan is trending. A report built from your genetic data — designed to inform how you eat, which pattern your body is likely to respond to, and how to build a sustainable approach to weight around the specific way your body handles food, hunger, and energy.
43-Trait Weight-Loss Report
Detailed analysis of every genetic trait — macronutrient response, metabolism and fat storage, appetite and satiety, food reactions, nutrient needs, and eating behavior. Written in clear English with references to the peer-reviewed nutrigenomics research behind each insight.
Carb-Sensitive vs Fat-Sensitive Map
The most important read for weight loss: whether your body responds better to lower-carb or lower-fat eating — and the food approach that fits your wiring. Always framed around nourishment, personalization, and what's sustainable, with the genetics laid out so you can build a plan that suits you, ideally alongside a registered dietitian.
Appetite, Metabolism & Nutrient Priorities
Your FTO, MC4R, UCP1, and related genetics highlight how your body signals hunger and handles energy — plus which nutrients (via MTHFR, VDR and others) deserve attention so you feel well-fueled enough to sustain the effort. The report turns "why am I always hungry?" and "why is this so slow?" into genetics-informed context to discuss with your provider or dietitian, not a guessing game.
Interactive Online Dashboard
HIPAA-compliant, secure portal. Access from any device. Share with your dietitian, doctor, or nutrition coach in one click.
If you've ever wondered why losing weight is harder for you.
The Weight Loss Optimization test is recommended for personalized weight management and nutrition planning. It's especially valuable for these four people.
The one whose diet worked for everyone but them
You followed the plan that transformed a friend — and your body didn't respond the same way. The test decodes your FTO, TCF7L2, and APOA2 genetics so you can see whether you're carb-sensitive or fat-sensitive, and finally match your eating to your wiring instead of someone else's results.
The one who's always hungry
You eat a real meal and you're hungry again an hour later, and you've wondered if your appetite is just built differently. The test decodes your FTO and MC4R genetics so you can see whether softer satiety signaling is part of your wiring — and build habits that genuinely quiet hunger instead of fighting it.
The one whose progress always stalls
You start strong, then it plateaus — and the rebound feels inevitable. The test decodes your metabolism and energy-balance genetics (UCP1, ADRB2) for context, not a verdict: it helps you set realistic expectations, be patient with your body, and bring focused questions to a dietitian instead of blaming yourself.
The serial dieter ready to stop guessing
Years of plans, apps, and trends — and a feeling that you're guessing at what your body actually needs. The test decodes your genetics so you can stop chasing the next diet and start with the eating pattern your DNA suggests is the best fit for you, ideally built out with a dietitian.
Your weight-loss wiring, decoded once.
What you're probably wondering.
No. This is a nutrition and self-knowledge test, not a diagnostic test for any disease or condition, and it is not a weight-loss treatment or program. It decodes genetic traits related to how your body tends to respond to food, hunger, and energy — to inform personalized, sustainable nutrition. It does not diagnose, treat, cure, or prevent anything, and it cannot tell you how much weight you will lose. For any health concern, or before making significant changes to your diet, please talk with your physician or a registered dietitian.
It gives you directional, genetics-informed guidance — whether your body tends to respond better to lower-carb or lower-fat eating, how your appetite genetics are wired, and which nutrients deserve attention. It does not prescribe a rigid meal plan, calorie target, or weight-loss program, and we'd never want it to: the most effective approach to weight is sustainable and built around nourishment, not restriction. Think of it as a precise, personalized starting point to build on — ideally with a registered dietitian.
By itself, no — and any product that promises a number isn't being honest with you. Your genes are one important piece of the picture; your habits, sleep, activity, life stage, health, and consistency matter enormously, and they're within your control. What this test does is remove the guesswork about which approach is most likely to fit your body, so the effort you put in is better aimed. It's a map, not a magic wand — most powerful when paired with a registered dietitian or your healthcare provider.
They share the same underlying nutrigenomics panel but emphasize different questions. The Weight Loss Optimization test leads with the traits most relevant to weight — macronutrient response, appetite and satiety, and metabolism — to help you find the eating pattern your body responds to. The Vitamin & Nutrient Absorption test foregrounds how you absorb and use vitamins and minerals. There's meaningful overlap, so most people only need one; choose the one that matches what you most want to understand right now.
Your report can highlight where your genetics suggest you may benefit from a particular nutrient or form of it. But please talk with your healthcare provider before starting or changing supplements — more is not always better, some can be harmful in excess, and the results don't endorse "fat-burner" products. The report is a conversation starter for working with a professional, not a prescription.
Yes — and we encourage it. The report gives a registered dietitian, physician, or nutrition coach a genetics-informed window into how your body tends to respond to food, hunger, and energy that a standard consultation can't capture. It can help them personalize their guidance. They bring the clinical and dietary judgment; the report adds one more layer of self-knowledge. You stay in control of what you share.
The testing is performed in a CLIA-certified laboratory using established SNP (Single Nucleotide Polymorphism) analysis — the standard for FTO, MC4R, TCF7L2, APOA2, UCP1, and the rest of the panel. Every interpretation is grounded in peer-reviewed nutrigenomics research. Your DNA and personal data are kept secure and HIPAA-protected at every step.
No. Your DNA does not change. One test gives you results that are yours, forever. As nutrigenomics research evolves, interpretations may be updated — but your underlying genetic data is a one-time investment.
Yes. The lab is CLIA-certified and your data is stored in a HIPAA-compliant system. We do not sell or share your genetic data. You are always the owner.
Due to state regulations on direct-to-consumer genetic testing, we currently do not ship to New York, Pennsylvania, Rhode Island, or Maryland. Anywhere else in the United States is fine.
Stop dieting for someone else's body. Start with yours.
One cheek swab. Forty-three answers. The architecture behind how your body responds to carbs and fat, signals hunger, and stores and burns energy — finally readable. Not a diet, and not a promise. A working manual for the body you're actually trying to change.
Order My Weight-Loss Test — $249
Medical & Regulatory Notice
The health assessment offered through ILSA Health is designed for preliminary screening and educational purposes only. Completion of this questionnaire does not create a doctor–patient relationship.
All medical services, including clinical evaluations, treatment plans, and prescription decisions, are provided exclusively by independent U.S.-licensed healthcare providers. Providers exercise full medical judgment and determine eligibility based on individual clinical assessment and applicable state regulations.
If approved, prescriptions are dispensed by U.S.-based 503A compounding pharmacies that are registered with the FDA and operate in compliance with United States Pharmacopeia standards. Compounded medications are not FDA-approved and have not undergone FDA evaluation for safety, effectiveness, or manufacturing consistency.
Individual responses to treatment vary. No specific results are guaranteed.
ILSA Health does not manufacture, compound, or directly dispense medications. Product appearance, packaging, and labeling may vary from images shown on this website.
All trademarks and product names are the property of their respective owners.
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