Dr. Sarah Jenkins, PhD, RD, CPT
Lead Clinical Dietitian & Exercise Physiologist
Dr. Sarah Jenkins is a board-certified Registered Dietitian and clinical exercise physiologist with over 15 years of clinical experience specializing in metabolic adaptation, weight loss percentage tracking, calorie deficits, and obesity medicine. She serves as the Clinical Review Lead at Weight Loss Percentage, ensuring all calculators and articles adhere strictly to evidence-based medical research from the NIH, Mayo Clinic, and WHO.
🏥 Editorial & Medical Integrity Promise
"My goal is to eliminate fad diet confusion by providing scientifically backed, mathematically precise health metrics. Every calculator and guide on this platform is thoroughly cross-referenced against peer-reviewed metabolic literature to ensure safe, effective weight management."
Articles Authored & Clinically Reviewed by Dr. Sarah Jenkins (19)
Anti-Gravity Exercises for Weight Loss: Science-Backed Routine + Full Guide
Discover how anti-gravity exercises accelerate weight loss, improve hormonal health, and aid joint recovery.
Calorie Deficit for Weight Loss: Everything You Need to Know
Learn how to calculate and maintain a calorie deficit for sustainable weight loss. Includes TDEE formulas, deficit targets, and a free weight loss calculator.
Best Diet for Weight Loss: Mediterranean vs Keto vs Low-Carb
Evidence-based comparison of the most popular diets. Clinical data on which actually produces the best results for weight loss and long-term health.
Sleep and Weight Loss: The Surprising Connection
Poor sleep can reduce fat loss by up to 55%. Discover how sleep affects leptin, ghrelin, cortisol, and growth hormone — and how to optimize it.
Weight Loss Percentage at 100–130 lbs
Every pound counts more at lower body weights. Learn what 5%, 10%, and 15% loss mean at 100–130 lbs and why tracking percentage matters.
Weight Loss Percentage at 130–170 lbs
The sweet spot for progress. Discover 5–15% weight loss milestones, optimal calorie deficits, and plateau strategies at this weight range.
Weight Loss Percentage at 230–300 lbs
Rapid, safe, life-saving progress. At this weight, 5% loss is 12–15 lbs. Find safe deficit plans, exercise guidance, and medical considerations.
Weight Loss Percentage at 300–400 lbs
Major impact weight loss. What 5%, 10%, 20%, and 30% loss looks like at 300+ lbs. Includes medical monitoring guidance and nutrition strategy.
How to Calculate Weight Loss Percentage: The Ultimate Guide
Weight loss percentage is the gold standard for tracking real progress. Here is the mathematical formula, worked examples, and why it is superior to absolute pounds.
The Smart Way to Track Your Weight (Without Losing Your Mind)
If your scale ruins your mood by 7 AM, you are tracking wrong. Here is how water weight, glycogen, and hormones create scale fluctuations.
Weight Loss Percentage Chart: Track Your Monthly Milestones
Looking for a visual way to track weight loss percentage? Use this month-by-month chart and milestone tracker to gauge your progress accurately.
The Biggest Loser Weight Loss Formula: How It Works
Ever wondered how they determine the winner on the Biggest Loser? Here is the math behind the competition, and why percentage is the fairest metric.
Newborn Weight Loss: How Much Is Normal in the First Days?
It is normal for newborns to lose weight in their first few days. Here is the clinical science explaining safe boundaries.
Walking for Weight Loss: Steps, Calories, and Consistency
Walking is the ultimate tool for sustainable fat loss. Here is the science of steps, calorie burn rates, and joint preservation.
Keto Diet Weight Loss: Mechanisms and Reality
How does the keto diet actually drive fat loss, and is it right for you? Let us examine the metabolic science, water weight drops, and long-term realities.
GLP-1 Medications for Weight Loss: Clinical Guide (Wegovy, Ozempic & Zepbound)
GLP-1 receptor agonists are changing obesity treatment. Learn the clinical differences, weight loss expectations, and safety requirements.
Peptide Therapy for Weight Loss: Science, Safety, and Reconstitution Guide
Beyond FDA-approved medications, peptides are a popular topic in fitness and research circles. Here is the science and dosing math.
Bariatric Surgery Weight Loss Timeline and Milestones
Understand what milestones to expect at 3, 6, and 12 months post-bariatric surgery, how to track excess weight loss percentage, and manage dietary phases.
Sustainable Lifestyle Changes for Permanent Weight Loss
Fad diets fail because they are temporary. Focus on building the sleep, activity, and psychological habits that keep weight off permanently.