Iron, Vitamin D, B12 and Zinc: Which Deficiencies Cause Hair Loss?
Which deficiencies are linked to hair fall, which tests show them, why supplements without a test can backfire, and how long regrowth takes.
Alopecia areata causes smooth, round patches of hair loss on the scalp, beard or eyebrows, often within a few weeks. The immune system is turning on the hair follicles. At our Rohini clinic in North-West Delhi, a doctor confirms the diagnosis, explains how likely the patches are to regrow and agrees a plan that fits how much hair is affected.
Rohini Clinic
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In brief
Not contagious, and not caused by hair care, diet or anything you did.
One or a few small patches often recover without treatment.
Stronger options are used only under close medical supervision.
Extensive disease may be better managed by another team.

The condition
The immune system mistakes hair follicles for a target and switches them off. The follicles are not destroyed, which is why hair can grow back, and why the condition can come and go.
It has an inherited tendency and is more frequent alongside thyroid disease or other autoimmune conditions. It can affect the scalp, beard, eyebrows, lashes, body hair and nails.
Loss of all scalp hair is called alopecia totalis, and loss across the body alopecia universalis. Both are harder to predict than separate patches.
Recognising it
The pattern is usually distinctive, but other conditions cause patchy loss too, and they are treated differently.
Coin-sized or larger areas of complete hair loss on normal-looking skin, appearing over days or weeks and rarely sore.
Under magnification, short hairs that narrow towards the scalp are often seen at the margin of an active patch.
A bare patch in the beard or a gap in an eyebrow can be the first sign, or the only one.
Small pits or ridges on the nails sometimes go with it, so the nails are checked too.
New hair in a recovering patch is often fine and white at first, and usually darkens over time.
Scalp ringworm, hair pulled out by habit, traction from tight styles and scarring conditions can all look similar. The table below shows how they differ.
How the patch looks, and what the skin and hairs show under magnification, usually separate these. Each is treated differently, so the diagnosis comes first.
Patchy hair loss needs a doctor’s examination rather than a salon treatment; dermatologist, trichologist or salon explains who can diagnose it and prescribe. The six-question hair loss self-assessment can suggest a next step before you book.
At the Rohini clinic
The diagnosis is usually made on examination. Bring photos from when the patches first appeared, dates of earlier episodes, your medicines and any recent blood reports.

Step 01
When each patch appeared, earlier episodes and family history, then the scalp, beard, brows, lashes and nails, with trichoscopy to rule out lookalikes.

Step 02
Screening bloods only where indicated; a biopsy is rare. Then the options with their likely benefit, side effects and review schedule, including waiting.

Step 03
Each patch photographed at the first visit, then compared at every review so change is measured, not guessed.
Treatment
The choice depends on the number and size of patches, how long they have been there, your age and your health. Medicines and doses are decided at the consultation, not listed here, because some need close medical supervision.
For one or a few small patches, regrowth without treatment is common, though it can take months. Waiting with photographs and a review date is a reasonable choice, not a refusal to treat.
Applications to the skin, or injections into a patch at intervals. Side effects, such as a temporary dip in the skin where an injection was given, are explained beforehand.
Widespread or long-standing loss may call for tablets or other treatment under close medical supervision, with monitoring that can include blood tests. If another team is better placed, onward referral is discussed openly.
A thyroid problem found on screening is treated in its own right; see which blood tests matter for hair loss. Hair fibres, brow pencil, scarves and wigs do not treat the condition, but help many people through it.
Not treatments for alopecia areata
PRP is not an established treatment for this condition, and a transplant does not touch the immune process. If your hair loss is diffuse rather than patchy, see hair fall treatment in Rohini; for women, women's hair loss treatment in Rohini.

Surgery
Hair, beard and eyebrow transplants are carried out at the Rohini clinic, but not into active alopecia areata.
Surgery is not ruled out for life. Once the condition has been diagnosed, treated and stable for a sustained period, it can be reconsidered cautiously. The same applies to an eyebrow transplant in Rohini or a beard transplant in Rohini. More in who should not have a hair transplant.

Living with it
Nobody can say for certain how your own case will behave. Sudden hair loss can be upsetting, especially when it shows on the eyebrows or beard.
Stress is often reported around the time patches appear, but the link is not proven, and being told to relax rarely helps. Say how it is affecting you; if low mood or anxiety is getting in the way of daily life, the doctor can suggest where to find support.
Reviews take place at the Rohini clinic; see directions to the Rohini clinic.
Day to day in Delhi
Weather, water and air do not cause alopecia areata, which is autoimmune, but they change a few practical things. General points; your own plan comes from the examination.
Skin in a bare patch has lost its cover and can burn. A cap, a scarf or sunscreen on the patch helps on bright days.
Covering the patches does not make them worse. Keep linings clean, and let a sweaty scalp dry afterwards.
Damp months can aggravate fungal scalp infections. A scaly patch with broken hairs may be ringworm rather than alopecia areata, so show it to the doctor.
They can leave hair dry or the scalp irritable, but they do not cause the patches. New patches are the condition, not your water supply.
Cost guidance
The cost follows the extent of the condition. One or a few small patches mostly mean the consultation and review visits, with treatment on or into the patches if you choose it. Extensive or long-standing disease needing supervised treatment and monitoring costs more, and runs for longer.
Prices are not published; the written plan you are given includes the cost. Where a plan runs over several months, instalment options through third-party lenders may be available; ask at the consultation, and see cost and EMI options. PRP is not an established treatment for alopecia areata, so it is not part of a plan for it.
Extent of the patches
Review visits
Treatment into patches
Supervised treatment
They apply wherever you are seen, including here.
Who you will see
Treatment at the Rohini clinic is carried out by registered medical practitioners. Every doctor at DenceSpot is listed below with their qualifications.
Dr. Nyra
MBBS, MD (Dermatology)
Further reading
Plain-language articles on hair loss and its treatment. Each article shows its own author and review details.
Which deficiencies are linked to hair fall, which tests show them, why supplements without a test can backfire, and how long regrowth takes.
How an underactive or overactive thyroid affects hair, the tests that show it, and what to expect once thyroid levels are treated.
Why shedding often starts a few months after childbirth, how long it usually lasts, treatment questions while breastfeeding, and when to get it checked.
Visit the clinic
Alopecia areata is diagnosed, treated and reviewed at our Rohini clinic in North-West Delhi, a short way from the Outer Ring Road.
Our clinic
Rohini, Delhi
Every treatment below is carried out at the Rohini clinic, and each starts with an examination and a written plan. See the Rohini clinic page for directions and hours.
Cost guides for the Rohini clinic: Hair transplant cost in Rohini · PRP treatment cost in Rohini · Beard transplant cost in Rohini.
Rohini, Delhi
Book an assessment at the Rohini clinic. You will get a diagnosis, screening only if your history calls for it, a plan matched to how much hair is affected, and a clear answer on surgery.
