Ho 40 years old, regular cycle, normal exams. But for a few months now I’ve been sleeping worse, in the days before my period I’m swollen and irritable like I never was before, and above all I struggle to maintain my weight even though I eat exactly as I always do, in fact, sometimes I’m hungrier, especially for sweets in the afternoon. My gynecologist found nothing to worry about. But I feel that something has changed. Could it be due to nutrition?
It may depend on the diet. But more precisely: it depends on the fact that the body is starting to respond differently to food at this stage, even if the tests don’t show it yet. What he describes is a recognizable picture, with a precise biological explanation. Nutrition is both part of the problem and part of the solution.
What’s happening to hormones
Around age 40, often before any cycle irregularities, a silent transition begins. Ovulations become progressively less effective, and with them the production of progesterone, the hormone produced just after ovulation, declines. Estrogen, meanwhile, can remain stable or fluctuate upward, before its final decline. The result is a relative imbalance between the two hormones that the body clearly feels, even when tests are normal.
Premenstrual bloating and irritability, sleep becoming lighter, the sensation that something has changed without an identifiable cause: these are signs of this initial hormonal rearrangement.
Blood sugar is less well managed
One of the lesser-known effects of this transition is that the body begins to handle sugars less efficiently. Gradually, over time, the insulin response changes: the same meal that was previously digested without difficulty can now produce a more marked glycemic peak, followed by an equally rapid drop.
That drop is exactly what generates the hunger for sweets in the afternoon. A physiological response to glycemic instability which becomes more frequent in this phase, especially if meals are not structured to contain it.
Regarding weight, the mechanism is similar: an organism that manages sugars less well tends to accumulate visceral fat more easily, even with the same calories introduced. That’s why the scale moves without the power supply changing.
Water retention: a separate chapter
Many women at this stage notice that they feel more bloated across the board, not just in the abdomen before their period. Water retention increases, and the reason is again hormonal.
Progesterone acts as a natural brake on aldosterone, the hormone that regulates sodium and water retention in the kidneys. When progesterone drops, this brake loosens and the body tends to retain more fluids. Estrogen, through a chain of hormonal signals, can push in the same direction. The imbalance between the two, typical of this phase, often translates into that sensation of persistent swelling, heavy legs, less toned tissues, which many women describe. On the food front, reducing the hidden salt in packaged foods and increasing potassium, through green leafy vegetables, legumes and fruit, helps modulate this mechanism. Even good hydration, paradoxically, reduces retention: the body retains less fluids when it receives enough.
How nutrition responds
The first concrete move is to stabilize blood sugar levels during the day. It’s about never eating carbohydrates alone and distributing them more consciously.
Breakfast is the most important meal at this stage. A sweet breakfast, even if light, triggers the first glycemic peak of the day and prepares the ground for the afternoon craving. The solution is not to give up dessert, but always combine it with a protein source: Greek yogurt or kefir with berries and a drizzle of honey, or ricotta with a teaspoon of quality jam. Those who prefer savory foods can have eggs, in any form, or a small avocado toast on wholemeal bread. The protein content slows down the absorption of sugars and stabilizes energy for the following hours.
Proteins must be increased and distributed. In this phase the protein requirement increases because the capacity for muscle synthesis changes. Including them in every main meal, including breakfast, makes a difference in both satiety and metabolism.
Good fats are allies. Extra virgin oil, oily fish, avocado, dried fruit: modulate the glycemic response, support hormone production and reduce the low-grade inflammation that accompanies this phase.
The afternoon snack needs to be rethought. If you get hungry for sweets, it’s a signal to listen to. A snack with a small amount of protein or good fats, a piece of mature cheese or a handful of nuts, interrupts the cycle without fueling it.
Reducing ultra-processed foods and simple sugars at this stage is important: they fuel inflammation, destabilize blood sugar and worsen premenstrual symptoms.
A targeted nutraceutical support
Alongside nutrition, there are some supplements with interesting evidence for this specific phase. Magnesium supports the nervous system, improves sleep quality and helps modulate mood in the premenstrual days. Vitamin D, often lacking even in those who live in sunny climates, plays a role in hormonal regulation and carbohydrate metabolism. Omega-3s reduce systemic inflammation and support cellular function. In some cases it may also be useful to evaluate adaptogenic plants such as chasteberry, traditionally used for symptoms of progesterone-estrogen imbalance in the premenstrual phase.
Always with a personalized assessment, because what is really needed depends on the specific situation of each woman.
The right time to intervene is now
Perimenopause can last for years before your last period. If the system is not supported in this window, we reach menopause with an already less reactive metabolism, already compromised sugar management, already reduced muscle mass. Acting now, when the body still responds well to the right stimuli, changes the trajectory of the next ten years. The power supply constructed in a manner consistent with this phase is the most effective lever available.
Doctor Federica Almondo
Doctor Federica Almondo.
Specialist in Nutrition Science, trained at the Dietology and Obesity Center of the San Raffaele Hospital in Milan, Doctor Federica Almondo is a point of reference in personalized nutrition, preventive medicine and anti-aging pathways.
After founding and directing Cerva 16 – Nutrition & Anti-aging Center, he is now responsible for the Nutrition and Longevity areas of Image Regenerative Cliniccenter of excellence and international point of reference for Regenerative Medicine and Aesthetic Medicine with offices in Milan and St. Moritz.
It deals with tools such as genetic tests (DNA), assessments of the state of the intestinal microbiota, analysis of oxidative stress, body composition, indirect calorimetry, ANS Analysis to build highly personalized diets with a holistic and scientifically validated approach, suitable for even the most complex needs.
With excellent training and skills ranging from nutrigenetics and nutrigenomics to nutraceutics, metabolomics and epigeneticsAlmondo is also recognized for her work on intestinal health, menopause, chronic stress management and optimization of psycho-physical energy. Particular attention to ketogenic therapya nutritional approach now totally validated by scientific literature such as effective intervention in many complex pathologiesincluding type 2 diabetes, PCOS, fibromyalgia and lipedema and much more.