Can Hair Really Grow Back? The Scientifically Proven Answer
When hair begins thinning or shedding more than usual, the first question many people ask is, “Can my hair grow back?” The short answer is yes — in many cases, hair can regrow, but only if the follicles are still alive and the scalp environment is healthy enough to support the hair cycle.
At Svenson, trichologists carefully assess whether follicles are dormant, weakened, miniaturised, or inactive. With the right diagnosis and targeted treatment plan, it is often possible to restore growth, strengthen the follicles, and improve overall density.
Understanding the science behind regrowth is the key to knowing what is reversible — and what is not.
How Hair Actually Grows: The Biology Behind Regrowth
Every hair follicle goes through a natural cycle consisting of three phases:
Hair actively grows for two to seven years. This phase determines density and length.
Growth slows as the follicle begins to shrink. This phase lasts two to three weeks.
The hair detaches and eventually sheds. The follicle rests before re-entering the growth cycle.
Typically, 85 to 90 percent of follicles should be in the growth phase at any time. Regrowth becomes difficult when too many follicles shift into the resting phase prematurely or become miniaturised.
Can Hair Grow Back? It Depends on the Follicle
Hair can grow back if the follicle is still alive. There are three main conditions:
Dormant follicles are inactive but not dead. They can often be reactivated by improving circulation, regulating scalp oil, reducing DHT, and restoring scalp health.
These follicles respond well to:
- DHT-suppression formulas
- Scalp detoxification
- Growth factor therapies
- Microcirculation treatments
Miniaturisation is caused by hormones (especially DHT), inflammation, or chronic buildup. The follicle still grows hair, but the strands become thinner and shorter.
With targeted intervention, miniaturised follicles can regain:
- Thickness
- Strength
- Longer growth phases
Follicles that have completely closed or lost structure cannot regrow hair. This is usually the result of long-term, untreated genetic hair loss or scarring conditions.
Early intervention is essential to prevent follicles from reaching this stage.
What Stops Hair From Growing Back
Several factors can interrupt the growth cycle and push follicles into prolonged inactivity:
The primary hormone responsible for genetic thinning. DHT shrinks follicles and shortens the growth phase.
Oil buildup suffocates follicles, restricting oxygen and nutrients.
Conditions such as dandruff, dermatitis, and yeast overgrowth weaken the scalp barrier.
Without adequate blood flow, follicles receive fewer nutrients required for growth.
Stress pushes follicles into the resting phase, causing sudden shedding.
Lack of iron, zinc, protein, vitamin D, or omega-3 affects the strength of new strands.
Bleaching, perming, and frequent heat styling can weaken follicles over time.
When multiple triggers combine, regrowth slows dramatically.
Scientifically Proven Ways to Reactivate Hair Growth
Svenson’s approach is based on trichology and decades of clinical experience. Regrowth is possible when treatment targets the root causes of follicle inactivity.
1. Deep Scalp Cleansing and Detox
Oily Scalp Therapy clears sebum, residue, and buildup. This improves oxygen flow and prepares the scalp for active regrowth.
Follicells Growth Activator helps suppress DHT formation by up to 50 percent, reducing miniaturisation and allowing follicles to grow thicker strands again.
3. Growth Factor and Exosome Therapy
A.P Hair Loss 4–6 Therapy delivers peptides, amino acids, and growth factors deep into the scalp. These biologically active molecules:
- Repair cellular damage
- Support follicle vitality
- Stimulate dormant follicles
Filler Advanced II uses SP1-Technology and BiCelphin Technology to restore scalp elasticity and improve follicle anchoring for denser growth.
Scalp Activation Massage boosts microcirculation so follicles receive the nutrients they need to re-enter the growth phase.
Topical tonics such as Defence Hair Booster Tonic and proper cleansing routines maintain follicle activity between clinic visits.
When Hair Regrowth Is Most Successful
The earlier the intervention, the greater the chances of regrowth. Regrowth is most successful when:
- Follicles are dormant, not dead
- Miniaturisation has just begun
- Scalp health is actively supported
- DHT levels are controlled
- Inflammation and buildup are reduced
- Daily habits support hair biology
This is why early consultation and diagnosis are critical.
What to Expect With Consistent Treatment
Clients who follow their personalised treatment plan typically experience:
- Reduced shedding within the first month
- Stronger, thicker strands by month two or three
- Visible regrowth and improved density by months four to six
- Sustained improvement with ongoing scalp maintenance
Results are gradual because follicles need time to re-enter the growth phase, but improvements are measurable and progressive.
Hair can grow back when follicles are still alive. The key is identifying whether the follicles are dormant, miniaturised, or inactive — and addressing the underlying causes that prevent regrowth.
Svenson’s science-backed therapies work by restoring scalp health, reactivating follicles, controlling DHT, and strengthening the scalp structure to support long-term, sustainable growth. With consistent care and early intervention, regrowth is achievable for many individuals experiencing thinning or shedding.