Yes, hair often grows slightly faster in the sun/summer due to increased Vitamin D production, better circulation from warmth, and potentially a healthier diet with more fresh produce, but this boost is temporary and depends heavily on overall health, genetics, and hair care. While sunlight stimulates cell division and Vitamin D, which supports hair follicles, direct sun can also cause damage; the key is balanced exposure and good hair health routines.
The sun and heat do enhance hair growth. Human hair indeed grows faster during the summer by about 10% compared to hair growth during the colder weather. Following a study conducted by the National Institute of health, seasonal changes cause changes in hair growth.
Vitamin D synthesis promotes hair follicle stimulation, which keeps your strands strong and resilient as well as aiding hair growth. Moderate sun exposure can help improve the health of your scalp and can help combat certain conditions such as dandruff and psoriasis.
Biotin is a supplement thought to increase hair growth, but did you know you can find biotin naturally in foods like salmon, eggs and chicken? Hair is comprised of protein, so it makes sense to ensure you're factoring in a good amount at each meal.
Seasonal observations: Population studies show slightly faster hair and nail growth in warmer months (spring--summer) versus colder months; increased shedding (telogen effluvium--type patterns) is often reported in late summer/early autumn following seasonal hair-cycle timing.
Losing around 50-100 strands of hair everyday is completely normal. To understand the cause of this, we need to get into the cycle of hair growth [2]. Your hair grows in three phases: 1.
The "Big 3" in hair loss treatment refers to a popular, multi-pronged approach using Minoxidil, Finasteride, and Ketoconazole shampoo, targeting different aspects of hair thinning (like circulation, DHT, and inflammation) for potentially better results than single treatments, often used for androgenetic alopecia (male pattern baldness). While Minoxidil promotes growth, Finasteride blocks follicle-shrinking DHT, and Ketoconazole reduces scalp inflammation, sometimes Microneedling replaces Ketoconazole as a "Big 3" component.
Hair growth is regulated by male hormones (androgens, such as testosterone and dihydrotestosterone), which are present in both men and women but in different amounts. Testosterone stimulates hair growth in the pubic area and underarms.
Their secret is the fermented rice water that they use to wash their hair 2-3x a week and just once in winter 🍚 Although their secret is rice water, scientists in China went to investigate and concluded it was actually because of their genetics 😅 but it doesn't hurt to try their rice water recipe!
Sleep deprivation disrupts the biological hair growth cycle, prematurely pushing follicles into the shedding phase. Over time, this leads to progressive hair loss. Improving sleep consistency helps stabilise hormones, encourages new hair production, and alleviates stress - creating conditions for robust growth.
The most natural treatment is exposure to sunlight for hair loss. As per experts, spending 15-20 minutes outside in the sun and consuming diets rich in nutrients can help hair growth and development.
10 hair care habits that can damage your hair
Did you know your hair grows 70% faster at night than during the day? While you sleep, your body enters a state of deep repair—and your hair follicles are no exception.
The cells in our entire body divide much faster when we are surrounded by UV rays. This also applies to the head. Sunlight ensures that more cell energy is available - and this is essential for good hair growth. However, it is not only the cell formation, but also the sun vitamin that ensures a fuller head of hair.
Scalp hair does grow faster in the summer months or warmer periods, but to an extent that is not hugely noticeable - about 10 to 15% due to increased circulation. However, hair growth does actually slow with age.
Many people suffer from vitamin D deficiency due to lack of exposure to sunlight or poor intake of foods rich in vitamin D. This can lead to hair loss and other health issues.
Asian hair has the highest hardness and elasticity. It is resistant to stretching and can withstand a traction force of 60 to 65 grams.
Japan, Spain and Sweden are widely known for having people with healthy hair, but there are also other countries like India, France and Russia that are also known for helping people keep their hair natural and not messing with any artificial coloring.
The human hair follicle is a unique mini-organ, capable of life-long cycles of massive growth (anagen), regression (catagen), and resting (telogen).
What makes up 90% of hair? Hair is 90-95% keratin, a strong fibrous protein that provides structure, strength, and flexibility. The remaining components include water, lipids, melanin (pigment), and trace elements.
Increases in androgen (male hormone) levels are the primary cause of most hirsutism cases. If caused by increased levels of androgens, it can be treated with medications that reduce androgen levels. Some birth control pills and spironolactone reduce androgen levels.
The "Big 3" for thinning hair, especially male/female pattern baldness, are typically Minoxidil (Rogaine), Finasteride (Propecia), and sometimes Ketoconazole shampoo, or even Microneedling, forming a multimodal approach to stimulate growth and block hormones (DHT) causing hair loss, with Minoxidil boosting circulation, Finasteride inhibiting DHT, and Ketoconazole reducing inflammation and acting as a mild anti-androgen.
Vitamin deficiencies, particularly iron, Vitamin D, Biotin (B7), B12, and Zinc, can cause hair loss by disrupting hair follicle function, keratin production, or oxygen supply, leading to thinning, shedding, or brittle strands; though rare, deficiencies in Folic Acid, Niacin (B3), and Vitamin A (excess is also harmful) can also contribute.
Stage 7: The most advanced androgenetic alopecia
This is the most advanced stage of male pattern baldness. The top of the head is completely bald, but some hair is still thinner and of varying density at the back and on the sides.