A patient came in seven months after she lost her mother. She was in her early 40s, had never had a hair issue in her life, and was finding handfuls of hair in the shower and on her brush every morning. She was convinced she was going bald. She had already bought three different supplements off Instagram and a pricey shampoo that promised regrowth. None of it had moved the needle. When I sat with her and walked through the timeline — caregiving stress for a year, the loss, three months of grief and disrupted sleep, then the shedding began — the diagnosis was sitting right there in the history. Telogen effluvium, classic presentation, triggered by a major stressor several months prior. The intervention she actually needed was completely different from the one she had been buying.
This article walks through what telogen effluvium is, why it shows up months after the trigger that caused it, what the workup looks like, and what you should and should not do about it.
What is actually happening in the follicle
Hair growth runs on a cycle, and the cycle has three phases. Anagen is active growth — this is where about 85 to 90 percent of your scalp hairs are at any given moment, and it lasts two to seven years. Catagen is a brief transitional phase of two to three weeks where the follicle stops producing hair and begins to involute. Telogen is the resting phase — the follicle is dormant, the hair is sitting in place but no longer attached to a growing matrix, and it lasts about three months before the hair sheds and a new anagen phase begins. At any given moment, 10 to 15 percent of your scalp hair is in telogen.
Telogen effluvium happens when a systemic stressor pushes a much larger fraction of your follicles — sometimes 30 to 50 percent — into telogen at once, prematurely. They sit there for about three months, then shed in a wave. That is why the shedding shows up two to four months after the trigger, not at the time of the stressor itself. The hair you are losing today was committed to its current cycle months ago.
The triggers that do this are well-characterized:
- A high fever or significant illness (post-COVID telogen effluvium has been a major clinical phenomenon since 2020-2021)
- Major surgery or significant blood loss
- Postpartum — a near-universal physiological telogen effluvium peaking around 3 to 4 months after delivery
- Significant weight loss in a short window, including from GLP-1 protocols when nutrition is undermanaged
- Severe psychological stress (bereavement, divorce, sustained caregiver stress, job loss)
- Discontinuation of oral contraceptives
- Iron deficiency, untreated thyroid disease, severe vitamin D deficiency
- Several medications (some antidepressants, beta blockers, anticonvulsants, retinoids)
The defining feature: shedding is diffuse — across the whole scalp, not in patches — and the hairs you are losing are full-length with the small white bulb of the telogen-phase club hair at the root, not broken or stubby.
How I distinguish telogen effluvium from the other things it gets confused with
When I evaluate a patient for hair shedding, the differential I am working through is short but important to get right because the treatments are different.
Telogen effluvium is diffuse shedding, time-related to a specific trigger 2 to 4 months prior, with full-length club hairs in the shed. The hair density may visibly decrease, but the part width stays roughly proportional and the hairline pattern stays intact. Self-limited in most cases — runs its course over 3 to 6 months once the trigger is gone, with regrowth following.
Androgenetic alopecia (female or male pattern) is gradual thinning at specific anatomical patterns — the part widening on the crown for women, the temporal recession and crown thinning for men. The shed hairs are often miniaturized — shorter, finer than the original hair shaft. This is a progressive condition, not self-limited, and it does not resolve on its own.
Alopecia areata is patchy hair loss in well-defined round areas, often with "exclamation point" hairs at the edges. Autoimmune in origin, episodic, sometimes associated with thyroid autoimmunity.
Cicatricial (scarring) alopecias — frontal fibrosing alopecia, lichen planopilaris, central centrifugal cicatricial alopecia — actually destroy the follicle. The skin where hair used to be looks shiny and lacks visible follicular openings. These need a dermatology referral, ideally to someone with a hair-disorder specialty, because the goal is preserving what is left rather than regrowing what is gone.
The distinction matters because regenerative treatments work for the first two and partially for the third. They do not raise the dead — they do not regrow hair from a follicle that is already gone.
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What I look for on the workup
Even when the history is clearly pointing at telogen effluvium, I run a focused lab panel because the systemic contributors are often layered together and any one of them can prolong the shedding past the typical 3- to 6-month window. The labs I order:
- Ferritin. I want above 50 ng/mL for hair recovery, and ideally above 70. Standard "normal range" for ferritin runs from about 15 to 200, and a ferritin of 25 will be called normal at the lab and will absolutely keep your hair shedding.
- TSH, free T4, free T3, reverse T3, thyroid antibodies. Subclinical hypothyroidism is a quiet cause of persistent shedding that gets missed when only TSH is checked.
- Vitamin D 25-OH. Below 30 ng/mL needs repletion; I aim for 50 to 80.
- CBC and B12. Looking for occult blood loss, megaloblastic anemia, B12 deficiency.
- Sex hormones in mid-life patients. Estradiol, progesterone, total and free testosterone, SHBG, DHEA-S. Hormonal transitions overlap with stress shedding more often than people realize, and getting both pictures is what tells me what is actually driving the shed.
- Fasting insulin and HbA1c. Insulin resistance amplifies androgen activity at the follicle and worsens androgenetic patterns when both are present.
- ANA and inflammatory panel if the history or exam suggests an autoimmune contributor.
Scalp examination matters too. I look at the part width, the hairline, the density distribution, the follicular openings, the hair shaft characteristics. A gentle pull test — drawing 50 to 60 hairs gently between the fingers and counting how many come out — gives a rough sense of whether active shedding is still happening or whether the wave has passed. More than 6 hairs out on a pull test suggests active telogen effluvium; under 3 is normal background shedding.
What actually treats it — and what does not
The honest first answer for telogen effluvium: if the trigger has passed and the contributors on labs are addressed, the condition resolves on its own over 6 to 12 months. The hair was always going to grow back. The follicle did not die — it took a forced rest. Your job is to remove the things prolonging the rest and let biology do the rest of the work.
The interventions that actually move the needle:
- Repleting iron, thyroid, vitamin D, and B12 to optimal — not just "normal" — ranges. This is where I see the biggest single response in patients whose telogen effluvium is dragging on past the expected window.
- Addressing the underlying stressor or sleep disruption. Cortisol that stays elevated for months prolongs the shed. Sleep architecture matters here.
- Protein adequacy. I want at least 0.7 to 1.0 grams per pound of target body weight. Hair is keratin, and keratin is protein. Patients eating substantially under-protein, especially on appetite-suppressing medications, will have a slower recovery.
- Hormonal optimization where indicated. For perimenopausal patients in particular, hormone therapy can be a meaningful piece of the puzzle when sex hormone shifts are layered on top of the stress shedding. For men with low testosterone, men's hormone therapy can play a similar role.
- Regenerative scalp work where it adds value. DE|RIVE hair restoration — the protocol combining EXO|E exosome therapy with scalp microneedling — accelerates the recovery of follicles that are emerging from telogen, and is particularly useful for patients who also have a component of androgenetic thinning underneath the telogen effluvium picture. Adapted scalp vampire facial PRP is another option in the same category.
What I tell patients to stop spending money on: random Instagram supplements with proprietary blends and no published mechanism, "biotin" megadoses (biotin deficiency is rare and high-dose biotin can interfere with several lab assays including thyroid and troponin), hair-fall shampoos that change nothing about what is happening at the follicle, and over-the-counter "hair regrowth" oils with no clinical data behind them. Save the money for the labs and the treatments that have actual mechanisms.
How I evaluate when a patient is ready for regenerative treatment
When someone comes in with hair shedding, the regenerative work is not always the first move. The decision tree:
If the workup shows correctable contributors — low ferritin, suboptimal thyroid, low vitamin D, hormonal transition, severe ongoing stress — the first three months are about correcting those. Layering DE|RIVE on top of an unaddressed deficiency is asking the treatment to do work the missing nutrient should be doing.
If the contributors are addressed and the shedding picture is still active or recovery is sluggish, that is when the regenerative protocol earns its place. Three to four sessions spaced four to six weeks apart, followed by maintenance every four to six months. We track with consistent clinical photography because the eye gets used to gradual change and the photos are what tell you it is working.
If the picture is mixed — telogen effluvium on top of underlying androgenetic thinning that the stressor revealed — the regenerative protocol earns its place earlier, because the androgenetic component is not going to self-resolve.
The clinical next step
If you are losing more hair than you used to and you are not sure why, the useful first move is a scalp consultation with focused lab work. Bring a timeline of the shedding (when it started, what was happening in your life and your health in the 2 to 4 months before that), the actual products and supplements you have been using, and any prior labs from the past 12 months. I will sort the picture, run the focused panel if you do not have one, and tell you whether what you have is self-limited and just needs the right contributors fixed, whether it warrants the regenerative protocol, or whether the pattern points somewhere else and needs a referral. You can book at either the Columbus consultation office or the Warner Robins office; the protocol is the same at both.
Medical disclaimer: This article is for educational purposes only and does not constitute medical advice. Individual clinical decisions should be made in consultation with a qualified healthcare provider following appropriate evaluation. References to specific treatments, dosing, or protocols are informational.
Travis spent 17+ years in high-acuity clinical medicine — emergency, cardiac ICU, and cath lab — before founding Revitalize. He is a Certified Platinum Biote hormone therapy provider, the published author of You're Not Broken — You're Unbalanced, and the founder of the Rebuild Metabolic Health Institute. His clinical writing reflects the same precision he brought to critical care: specific, honest, and built around what actually works.
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