Do Hair Follicles Follow a Natural Cycle?
Hair follicles are active structures beneath the scalp. Each follicle moves through a natural cycle that includes periods of growth, transition, and rest.
During the anagen phase, the follicle actively produces a hair strand. This phase can last for years. The follicle then enters the catagen phase, a short transition period when active growth slows. Finally, during the telogen phase, the follicle rests before the hair strand eventually sheds.
Not every follicle is in the same phase at the same time. This helps explain why some daily shedding is normal. Your hair is constantly going through this cycle, even when you do not notice it.
Can Seasonal Changes Influence Hair Shedding?
This is where things get interesting.
Research has reported seasonal patterns in hair shedding, although the exact reasons are not completely understood. Changes in daylight, temperature, and other environmental factors may play a role in the timing of the hair growth cycle.
However, seasonal shedding should not be treated as a simple rule. People have different hair types, lifestyles, environments, and growth patterns. A change you notice during one season may also be connected to factors other than the weather.
So, if your hair seems different at certain times of the year, the season may be one piece of the picture—but it is not necessarily the whole explanation.
What Happens to Hair and the Scalp When Weather Changes?
Even when weather does not directly change the hair follicle, it can change the environment around your hair.
During warmer months, higher temperatures and humidity can lead to more sweating. You may also wash your hair more often or spend more time outdoors. Sun exposure can also affect the feel and appearance of hair.
Cold weather brings a different set of conditions. Lower humidity and dry indoor air can leave the scalp and hair feeling dry. People may also use hot showers more often, which can add to that dry feeling.
These seasonal conditions can influence how your hair looks and feels without meaning that the follicles themselves have suddenly changed.
Could Nutrition Matter More Than the Weather?
Weather changes throughout the year, but your body needs key nutrients every day. Hair is made largely of keratin, a protein, so adequate nutrition supports the normal processes involved in healthy hair.
- Biotin: Supports normal energy metabolism and healthy hair.
- Zinc: Supports normal protein synthesis and cell division.
- Vitamin C: Supports normal collagen formation.
- Protein: Provides amino acids used to make keratin.
- Vitamin D: Supports normal cell function, including processes involved in hair follicle activity.
A balanced diet is the foundation. A thoughtfully formulated hair vitamin supplement can provide additional nutritional support when appropriate.
How Can You Care for Your Hair as Seasons Change?
Your hair-care routine can change with the weather without becoming complicated.
During warmer months, pay attention to sweat, frequent washing, and time spent outdoors. During colder months, gentle cleansing and avoiding very hot water may help your hair and scalp feel more comfortable.
Throughout the year, handle wet hair gently and avoid excessive heat styling. Repeatedly wearing very tight hairstyles can also place stress on the hair.
The goal is not to create a completely different routine every few months. It is simply to notice how your hair responds to changing conditions and make small adjustments when needed.
Final Takeaway
Seasonal changes may be connected with differences in hair shedding and hair appearance, but the relationship is not as simple as “cold weather causes hair loss” or “summer changes your follicles.”
Hair follicles naturally move through growth and rest phases throughout the year. At the same time, changes in temperature, humidity, sunlight, and daily habits can affect the hair and scalp.
The best approach is to focus on consistent hair wellness: eat a varied diet, provide your body with key nutrients, care for your hair gently, and adjust your routine as the seasons change.
FAQs
1. What nutrients support healthy hair follicles?
Protein, biotin, zinc, vitamin C, and other essential nutrients support normal body functions involved in healthy hair wellness.
2. Can hair vitamins support seasonal hair wellness?
Yes. Hair vitamins can provide convenient nutritional support as part of a balanced diet and consistent hair wellness routine.
3. Should I change my hair-care routine with the seasons?
Small adjustments can help. Consider changes in humidity, temperature, sweating, washing habits, and heat styling throughout the year.
References
- Natarelli N, Gahoonia N, Sivamani RK. Integrative and Mechanistic Approach to the Hair Growth Cycle and Hair Loss. J Clin Med. 2023 Jan 23;12(3):893. doi: 10.3390/jcm12030893. PMID: 36769541; PMCID: PMC9917549. Learn More
- Guo EL, Katta R. Diet and hair loss: effects of nutrient deficiency and supplement use. Dermatol Pract Concept. 2017 Jan 31;7(1):1-10. doi: 10.5826/dpc.0701a01. PMID: 28243487; PMCID: PMC5315033. Learn More
- Lasisi T, Smallcombe JW, Kenney WL, Shriver MD, Zydney B, Jablonski NG, Havenith G. Human scalp hair as a thermoregulatory adaptation. Proc Natl Acad Sci U S A. 2023 Jun 13;120(24):e2301760120. doi: 10.1073/pnas.2301760120. Epub 2023 Jun 6. PMID: 37279270; PMCID: PMC10268308. Learn More
