How to use this quiz
Answer 7 questions on primary goal, activity, dietary restrictions, macro familiarity, cooking frequency, supplement use, and preference for structure versus flexibility. The quiz branches based on goal × activity, then adjusts for restrictions. The goal and activity answers are the heaviest inputs — a cut with low activity produces a very different split than a bulk with high activity.
What your result means
The recommended split varies by branch: a higher-protein 40/30/30 (protein/carbs/fat) cut for sedentary fat loss; a carb-focused 30/45/25 for active muscle building; a flexible 30/40/30 with visual portion control (palm/fist/thumb) for maintenance; 25/50/25 with protein combining for plant-based; and lower-carb 25/35/40 (or keto-style 20/5/75) for low-carb restriction. The unifying principle: protein at roughly 0.8-1g per pound of body weight is the lever that most affects body composition, with carbs and fat filling in around it based on activity and preference.
When to trust it
These percentages are starting points, not prescriptions — individual response varies, and the keto end of the spectrum (<50g carbs) carries specific risks including keto flu during the 1-2 week adaptation, electrolyte imbalance, and nutrient shortfalls in fiber, vitamin C, potassium, and magnesium. Keto is not appropriate for pregnant or breastfeeding women, people with type 1 diabetes, pancreatic or liver disease, or a history of eating disorders. For any restrictive diet, a registered dietitian can verify the split is nutritionally complete.
Frequently Asked Questions
Do I need to track macros to eat healthy?
No. Macro tracking is a precision tool that earns its effort in specific situations: contest-lean body composition, careful recomposition, or athletic performance windows. For general health, the pattern matters more than the numbers: protein at every meal, vegetables and fruit dominating the plate, carbs around activity, fats mostly from whole sources. If that description matches your normal eating, tracking would mostly confirm what you already do.
Should my macro split change over time?
Yes, with your goal and season. Dieting phases typically raise protein (protect muscle in a deficit) and trim fat or carbs; muscle-gain phases add carbs around training; maintenance is where you have the most freedom to let preference decide. Age nudges it too — protein targets rise after 50. Revisit your split whenever your goal changes, not weekly; constant tinkering prevents you from learning what actually works.
Is a high-protein diet safe?
For people with healthy kidneys, high-protein diets (up to ~1.6-2.2 g/kg) show no adverse effects on kidney function across multiple trials — the warning mostly traces to patients who already had kidney disease. Two real caveats: very high protein over years crowds out fiber-rich plant foods (gut health cost), and anyone with a kidney condition should clear intake with their doctor first. For most people the risk isn't too much protein — it's too little as they age.