External factors influencing hair growth
Watch out for nutritional deficiencies and hydration
Nutritional deficiencies directly impact hair health. To support hair growth, focus on:
- Vitamin D. It contributes to the formation of hair follicles and hair growth.
- Zinc. It contributes to keratin synthesis and stimulates micro-circulation in the hair.
- Vitamin B. It helps produce keratin and keep hair healthy.
- Iron. It contributes to the oxygenation of the hair follicle.
Hydration plays an active role in maintaining healthy blood flow to the scalp—which is essential for delivering nutrients and oxygen to the hair follicles. Like the skin, the scalp is made up of several layers that require water to stay balanced and support hair growth. Water is also a component of the hair’s structure: when properly hydrated, hair is more flexible, more elastic, and more resistant.
To stay well hydrated, it is recommended to drink between 1.5 and 2 liters of water per day, consistently throughout the day. High-quality water, consumed regularly, also provides a varied intake of minerals.
The impacts of stress and seasonal changes
During periods of intense or prolonged stress, the body produces significant amounts of cortisol. This hormonal spike disrupts the hair's life cycle, causing many hair follicles to enter the shedding phase.
Stress also has negative effects on the growth phase by diverting blood flow away from the scalp. It receives fewer nutrients, less oxygen, and is no longer able to effectively “nourish” the hair. As a result, growth slows down, hair becomes finer, and might be less abundant.
Hair stress can be more intense during seasonal changes. Climate variations, sunlight, temperature, humidity, changes in diet... all these factors influence our metabolism.
To prevent and counter these effects, it is important to adjust your routine differently for each season: in spring, stimulate; in summer, protect; in autumn, strengthen; in winter, nourish. All while tailoring your hair care routine to your personal needs.