Some periods -menopause, pregnancy, change of season-cause hair loss more or less consistent that must be treated quickly.

Three experts come to our rescue and give us valuable advice to find a dense and healthier hair.

The advice of the dermatologist not to lose his hair

"The more dramatic the fall, the less severe it is, and the more likely it is to be transient," says Dr. Sylvie Garnier-Lyonnet, a specialist in hair loss

It is therefore carried out in depth with a capillary fertilizer in the form of a food supplement which protects the roots of external aggressions - pollution, tobacco, UV -, triggers of fall due to premature death. And we will restore the balance of the capillary cycle.

Secure values? Cystine, arginine, zinc, B vitamins, including B6. Cystine promotes the manufacture of keratin and boosts hair growth while increasing its size. Process optimized by vitamin B6.

As for arginine, its beneficial effect on the capillary vessels improves the irrigation and resistance of the hair shaft. Finally, zinc, which fights against androgens (male hormones) limits the loss of material in front of these hormones. Indeed, micro-secreted by women, they promote the fall of hair.

But patience: finding a good density requires four months of treatment.

The advice of the hairdresser to prevent hair loss

The first ritual is to air the hair by brushing it 2 minutes morning and evening, head bent, from the back to the front, then vice versa, with a half-round brush, without touching the scalp to not irritate him.

"This does not increase the fall because any hair that falls has already died for three months in the bulb," says Catherine Chauvin, director of the René Furterer Institute

One carries on with a self-massage that stimulates the cutaneous microcirculation: sitting, elbows on the table, head tilted forward, massed by rotating movements with fingers joined and palms flat, from the neck to the top of the skull, for 3 to 5 minutes.

Then, to reactivate the capillary growth, the hair bulbs are strengthened with a serum or a lotion concentrated in anti-falling active agents (amino acids, vitamins B5 and B8, copper, zinc) applied to wet hair for three months.

The advice of the endocrinologist to stop hair loss

"Ferritin levels are analyzed because iron deficiency (less than 50 micrograms) affects the hair," says Dr. Paule Nathan, an endocrinologist.

Supplemented with iron (prescription) tablets, combined with rich foods (black pudding, meat, liver, egg yolk, legumes, whole grains), combined with vitamin C that boosts 30% its assimilation (raspberries, broccoli).

We also dose its TSH hormone, to regulate the secretion of the thyroid in case of hypothyroidism or hyperthyroidism and to find balance and stability.

* Co-author, with Dominique Laty, of "Femme au top, Belle, en forme et en santé" (edited by Odile Jacob).