Key Points - The article discusses two critical age milestones in the aging process: around 30 years old and between 45 to 55 years old, where significant biological changes occur in the body [2][3] - At around 30 years old, the adrenal tissue shows early signs of aging, and endocrine homeostasis may be disrupted, which could be an early driving factor for aging [2] - The age range of 45 to 55 years marks a milestone where most organ protein groups experience a "molecular cascade storm," indicating a significant biological transition towards systemic aging [3] - The article emphasizes the importance of maintaining a slight feeling of hunger by eating until 70-80% full, which can help delay aging and extend lifespan [5][8] - Research indicates that limiting food intake can rewrite aging genes and potentially extend lifespan by 35% by promoting autophagy and clearing aging cells [7] - It is advised to gradually reduce food intake to adapt to a new eating habit without feeling deprived [13]