Evidence-Based Analysis
Smart Tools
Deterministic algorithms. No influencers, affiliate links, or hallucinations.
Paid Tools
Personalized recommendations. One-time payment per analysis.
Free Tools
Quick, evidence-based calculators. No account required.
TDEE Calculator
Calculate your Total Daily Energy Expenditure for weight management and fitness goals.
Use ToolBMR Calculator
Calculate your Basal Metabolic Rate — calories burned at rest for essential functions.
Use ToolInteraction Checker
Check for conflicts, synergies, and timing interactions between your supplements.
Use ToolTiming Calculator
Look up optimal timing for any supplement. When to take it, food requirements, absorption tips.
Use ToolMacro Calculator
Calculate optimal protein, carbs, and fats based on your goals and activity level.
Body Fat Calculator
Estimate body fat percentage using multiple measurement methods.
How It Works
Information
Provide information about your goals, data, and preferences.
Complete Payment
One-time payment via secure checkout to generate your analysis.
Results
Receive personalized recommendations with timing, dosages, and explanations.
Utilize
Save your results and/or download a PDF.
Why Sighed Effects
No Affiliate Links or Brand Recommendations
We don't recommend specific brands or products. Smart Stack focuses on ingredients and timing — you choose which brands to buy. No commission-driven recommendations. Our recommendations include explanations and citations, prioritizing supplements with strong evidence from systematic reviews and meta-analyses.
Research-Based Algorithms, Not AI
Our tools use deterministic algorithms built from peer-reviewed research on bioavailability, interactions, and timing. Every recommendation follows established clinical data — not language model predictions. Consistent, reproducible results.
Save Results with a Free Account
Create a free member account to save analysis results, track progress, and access recommendations anytime.
No credit card required · Access results anywhere · Free forever