Remedy Routes
    Metabolic
    Moderate Evidence

    Ghrelin Regulation

    Controlled hunger hormone levels for reduced cravings.

    TL;DR

    Ghrelin rises with weight loss and sleep deprivation, which is why hunger increases when you diet or sleep badly. Protein, fibre and adequate sleep blunt it far more reliably than any supplement.

    Why It Matters

    Ghrelin surges after weight loss and remains elevated for a year or more, which is a major physiological driver of weight regain. Short sleep raises ghrelin and lowers leptin, increasing appetite for energy-dense food.

    How to Measure

    Biomarkers

    Fasting ghrelin (research setting)
    Subjective hunger ratings
    Sleep duration
    Protein intake per meal
    Body weight trend

    Optimization Protocol

    Eat 25-40 g of protein per meal, get 25-35 g of fibre daily, and protect seven to nine hours of sleep. Avoid aggressive crash deficits, which drive the largest ghrelin rebound. Resistance training preserves lean mass and improves appetite regulation. No supplement meaningfully suppresses ghrelin.

    Supporting Supplements

    Whey Protein

    Compound
    Likely effective
    Moderate Evidence
    Effectiveness 4/5

    Protein is the most reliable dietary lever on hunger hormones, and whey is a convenient way to hit the dose.

    Magnesium

    Mineral
    Insufficient evidence
    Limited
    Effectiveness 2/5

    No direct evidence that magnesium alters ghrelin; any appetite benefit is indirect via sleep.

    Supporting Research

    Frequently Asked Questions

    What is ghrelin?
    A stomach-derived hormone that rises before meals and promotes hunger. It also increases after weight loss, which is part of why maintaining loss is difficult.
    Can supplements lower ghrelin?
    No supplement has convincing human evidence for sustained ghrelin suppression. Claims usually rest on small or short studies with surrogate endpoints.
    Does protein affect ghrelin?
    Yes - higher-protein meals suppress ghrelin more durably than equivalent carbohydrate or fat, which is one reason 25-30 g of protein per meal aids satiety.
    Does fibre help?
    Viscous fibres such as psyllium at 5-10 g/day slow gastric emptying and improve fullness, with modest effects on appetite hormones.
    How does sleep affect hunger hormones?
    Short sleep raises ghrelin and lowers leptin in controlled studies, increasing appetite for energy-dense food. Restoring 7-9 hours is a practical lever.
    What about GLP-1 medications?
    They act on different pathways and produce far greater appetite reduction than any supplement. Discuss suitability with a clinician rather than seeking supplement equivalents.

    Typical Timeframe

    1-4 weeks for appetite change

    Research Summary

    Studies5
    Supplements2
    Evidence
    Moderate Evidence

    My Notes

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    This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.