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There are other anti-fungal conditions that selenium sulfide is used for. Pityriasis Versicolor, for example, is caused by an imbalance of yeast normally found on the skin. Selenium shampoos are recommended to treat this condition by specialist dermatology groups. Studies have found both ketoconazole and selenium sulfide are more effective than placebo [6]. In addition, Tinea capitis (ringworm) is a common fungal infection. Due to an absence of high-quality evidence, treatment guidelines have been agreed by UK and EU specialist groups (BAD, HPA, and ESPD), based on experience and available clinical trials [7]. In case of any discomfort after the use of product or worsening of condition seek immediate opinion from your doctor If you have any questions after you have bought this medication, please speak to your pharmacist. Product SpecificationSelenium sulfide is an antifungal agent used in the treatment of seborrheic dermatitis, pityriasis versicolor, and tinea capitis (scalp ringworm). It’s a non-metallic trace mineral, found naturally in sulfur ore (and Brazil nuts!). It’s required at low doses for a range of cellular processes, including protective antioxidant activity, and thyroid function [1].

Selenium sulfide, an anti-infective agent, relieves itching and flaking of the scalp and removes the dry, scaly particles that are commonly referred to as dandruff or seborrhea. 2. What is selenium sulfide shampoo used for? Selenium sulfide is a complex molecule, forming rings of various sizes comprised of selenium and sulfur atoms. It’s not clear how the ingredient exerts an antifungal effect but is known to be effective against the yeasts and fungus commonly associated with scalp conditions (e.g. Malassezia, P. Ovale). A possible mechanism is selenium accumulation, leading to apoptosis (cell death) [4]. How effective are Selenium Sulfide shampoos? We looked a little further afield. The European Commission’s Scientific Committee on Consumer Safety recommends leaving the shampoo on for 5-10 minutes before rinsing and applied every 2 to 3 days. But they also caveat this by saying that this can vary by brand, and depends on any other ingredients in the shampoo. Selenium Sulfide shampoos should not be ingested, and only used in accordance with the recommended dosage instructions. ReferencesThis is a follow up from an earlier study which found “Both ketoconazole 2% shampoo and selenium sulfide 2.5% shampoo are effective in the treatment of moderate to severe dandruff; however, ketoconazole 2% shampoo appears to be better tolerated.” [9] Selenium sulfide shampoos are associated with a higher incidence of adverse effects than ketoconazole, with the most common reactions being: redness, irritation, burning sensations, dry hair, and blistering (if the shampoo is left on the skin for too long). Importantly, selenium sulfide shampoos have been known to discolor dyed hair, and can discolor metallic jewelry – so should be removed before use [2].

The potential side effects of selenium sulfide include skin irritation, oiliness, dryness, and increased hair loss. 4. What shampoos have selenium in them? There is no data to support the use of selenium sulphide in pregnant and breastfeeding women. For details, please consult with your physician

They aren't perfect shampoos though containing fragrance, sulfates, silicones and a few other potential irritants. However, not all shampoos are as prescriptive as this. For example, Vichy Dercos provides no guidance on frequency but instead recommend that you: Purified Water, Monoethanolamine Lauryl Sulphate, Empigen BB, Bentonite, Glyceryl Monoricinoleate S, Sodium Chloride, Titanium Dioxide, Perfume, Sodium Dihydrogen Phosphate Dihydrate, Citric Acid.