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Justine Blue: Side Effects and Benefits of the Hair Capsules and Dandruff Shampoo
Justine Blue hair capsules and shampoo: what is known and what is not

Reviewed by the Beseha pharmacist team · Updated 12 November 2026 · The numbers come from published PubMed abstracts and the product pages · 7-minute read

The 30-second answer

Justine Blue is two products: hair capsules (amino acids, minerals and vitamins) and an anti-dandruff shampoo (selenium sulfide and piroctone olamine). We opened no published study on either by name. A 2026 review of commercial hair supplements (14 studies, 967 participants) found a rise in growing-hair density but no significant difference in total hair count, and on other brands. The shampoo’s ingredients (selenium sulfide and zinc pyrithione) have dandruff trials, but the shampoo page does not state the concentrations.

What are the two products?

#1Justine Blue Hair Activator – 30 Capsules
30 capsulesEgyptian supplement

Justine Blue Hair Activator – 30 Capsules

Amino acids, minerals, vitamins and plant extracts to support hair

EGP 350

Current price from the product page

  • The page: cysteine, methionine, arginine and vitamins C and E
  • The page: zinc, selenium, copper and green tea, grape seed and golden millet extracts
  • The page: one capsule a day after food for at least 3 months

Heads-up: The page gives no ingredient doses, and says it does not treat hereditary baldness or thyroid- or anaemia-related shedding

Buy at Beseha →

#2Justine Blue Anti-Dandruff Shampoo – 80 or 175 ml
80 ml175 ml

Justine Blue Anti-Dandruff Shampoo – 80 or 175 ml

Selenium sulfide and piroctone olamine with four plant oils

From EGP 225

Current price from the product page

  • The page: selenium sulfide, piroctone olamine and rosemary, thyme, chamomile and juniper oils
  • The page: for oily and dry dandruff, in two sizes with the same ingredients
  • The page: twice a week, left on for 5 minutes then rinsed

Heads-up: The page does not state the selenium or piroctone percentage, and the price follows the size

Buy at Beseha →

The hair capsules: what does research say?

The 2026 Alanazi review (J Cosmet Dermatol, 14 studies, 967 people with hair loss or thinning) on commercial supplements (Nutrafol, Viviscal, Nourkrin and others, not Justine Blue) found versus placebo: lower telogen (shedding) hair density (difference −5.91), higher anagen (growing) density (+10.48) and a lower telogen proportion; but total hair count did not change significantly (p = 0.06), participants’ ratings favoured supplements, and adverse events were few. The authors called the results preliminary and asked for stronger independent research. And the 2019 Almohanna review of vitamins and minerals (vitamins A, B, C, D and E, iron, selenium and zinc) said their role is important but not entirely clear, that deficiency may be a modifiable factor, and that large double-blind trials are needed.

  • Justine Blue: the page gives no cysteine, zinc or selenium doses, so we cannot compare it with any study.
  • Timing: the review covered studies of 12 weeks to 12 months; the page says at least 3 months.
  • The page itself: it does not treat hereditary baldness or thyroid- or anaemia-related hair loss, and it should not be combined with high zinc or selenium.
Hair and dandruff numbers
Sources: Alanazi 2026, Danby 1993, Piérard 2002 and Farris 2026 (PubMed).

The shampoo: its ingredients have trials

Study Sample and strength Result
Danby 1993 246 patients with moderate to severe dandruff: ketoconazole 2% versus selenium sulfide 2.5% versus placebo Both beat placebo significantly, with ketoconazole better on day 8 only; and all nine adverse events were with selenium
Piérard 2002 331 patients with severe dandruff: ketoconazole 2% versus zinc pyrithione 1%, 4 weeks A 73% improvement with ketoconazole and 67% with zinc pyrithione, with ketoconazole significantly better and with fewer relapses; both well tolerated
Farris 2026 87 patients with moderate to severe dandruff, 6 weeks: selenium disulfide 0.6% versus ketoconazole 2% A 77.9% fall versus 69.5% on the severity scale, with no significant difference between the two; selenium was better for hair softness; tolerability excellent
  • These shampoo ingredients have evidence on dandruff, but the studies were on specific strengths (1%, 2.5% and 0.6%) and the Justine Blue page does not state its strengths, so we cannot say it gives the same result. And we opened no study on piroctone olamine.
  • Use per the page: shake the bottle, twice a week, leave on for 5 minutes then rinse.
  • Severe or persistent dandruff or with skin inflammation: a dermatologist.
Justine Blue caveats
Sources: both product pages, Alanazi 2026 and Danby 1993.

Ask a doctor or pharmacist first if

  • Hair loss is sudden, heavy or in patches, or after childbirth, illness or a harsh diet: the cause needs a diagnosis (thyroid, anaemia or other).
  • You are pregnant, breastfeeding or take regular medicines, or take high doses of zinc, selenium or biotin.
  • You are allergic to any ingredient or essential oils, or have an irritated or injured scalp.
  • Dandruff is severe or persists after a month of regular use, or comes with redness and scaling on the face or body.
  • You will have lab tests: tell the doctor about all supplements you take (the page itself warns about biotin).

Want to ask?

Beseha pharmacists answer on WhatsApp. Tap the “Ask a pharmacist” button and tell them your medicines and condition before you start.

FAQ

Do Justine Blue capsules help hair loss?

There is no study on it by name; the 2026 review on other supplements found a rise in growing-hair density with no significant difference in total hair count, and preliminary results. And it is not a treatment for hereditary baldness according to its page.

How many capsules a day?

According to the product page one capsule a day after food for at least 3 months.

Does it have side effects?

The page warns against combining it with high zinc or selenium, advises pregnant and breastfeeding women and those on chronic medicines, and on lab tests if biotin is present.

How often do I use the Justine Blue shampoo?

Twice a week according to its page, leaving it on for 5 minutes then rinsing.

Is selenium shampoo effective for dandruff?

A 246-patient trial found selenium sulfide 2.5% significantly better than placebo; but the Justine Blue strength is not stated.

When should I see a dermatologist?

If dandruff is severe or persistent or comes with skin inflammation, or if hair loss is sudden or in patches.

Read next: zinc or biotin for hair loss, best dandruff shampoo in Egypt, hair, skin and nails supplements and shampoo.

The bottom line

Justine Blue hair capsules are a supplement with unstated doses and no study on it, and reviews of hair supplements are preliminary. The shampoo’s ingredients have evidence on dandruff but their strengths are not stated. Use each product as its page says, get the cause of hair loss diagnosed with your doctor, and see a dermatologist if dandruff is severe or persistent.

Justine Blue Hair Activator at Beseha → Justine Blue Anti-Dandruff Shampoo at Beseha →

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