Fasting and hormones: what actually happens when we stop eating?
What happens to insulin, GH, IGF-1, ghrelin and testosterone during fasting — and what twin research can and cannot tell us.
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Fasting, Hormones & Autophagy
Five careful explainers about fasting, hormones, autophagy and individual response.
This content is general research information and does not replace medical advice, diagnosis, or individual treatment.
TwinPare Research · Fasting Series
All 5 articles
Autophagy and fasting: when does the cellular recycling system really work?
Human and twin research does not support an exact 16- or 24-hour autophagy threshold. Here is what markers and flux really show.
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Fasting can raise growth hormone—but does that mean more muscle?
Fasting can raise growth hormone while IGF-1 stays flat or falls. Learn why higher GH is not proof of muscle growth.
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Fasting and testosterone: does fasting raise or lower it?
Longer fasting can suppress LH and testosterone, while shorter eating windows need context. Twin research adds a genetic perspective.
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Same fast, different results: can genes shape your response?
Twin studies show genetic influence on fasting-relevant biology, but direct twin fasting trials remain a major research gap.
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