H One

H One is used to lighten the dark patches of skin (also called hyperpigmentation, melasma, "liver spots," "age spots," freckles) caused by pregnancy, birth control pills, hormone medicine, or injury to the skin. H One also known as benzene-1,4-diol or quinol, is an aromatic organic compound that is a type of phenol, a derivative of benzene, having the chemical formula C₆H₄(OH)₂. It has two hydroxyl groups bonded to a benzene ring in a para position. 

H One is deemed safe in the United States. There isn't any clinical evidence currently to suggest that H One is harmful to humans. However, minor side effects are still possible. It may cause a temporary uptick in redness or dryness at first, especially if you have sensitive skin.

H One bleaches your skin by decreasing the number of melanocytes present.

Common side effects of H One include:

• Mild skin irritation and sensitization (burning, stinging)
• Dermatitis.
• Dryness.
• Redness.
• Inflammatory reaction.

Whitening and brightening solutions with H One are safe to use during pregnancy and won't harm the foetus.

H One is not contraindicated during breastfeeding and if H One is required by the mother, it is not a reason to discontinue breastfeeding. However, some experts feel that long-term use of H One is difficult to justify in a nursing mother.

Inhaling H One can irritate the nose and throat.

H One is also a skin irritant in humans. Chronic (long-term) occupational exposure to H One dust can result in eye irritation, corneal effects, and impaired vision.

Apply H One cream once daily to clean, dry skin, preferably at bedtime, and leave on overnight.

H One a tyrosinase inhibitor, in a 4% cream can be used safely twice daily for up to 6 months to treat post-inflammatory hyperpigmentation. The efficacy of this treatment can be enhanced by using a retinoid nightly and a mid-potent steroid, which is applied twice daily for 2 weeks, then at weekends only.

It takes about four weeks on average for the ingredient to take effect.

You can use the product for up to four months, and then begin to taper off use.

Apply H One in the evening after Retin-A and in the morning for 2 to 6 weeks prior to the procedure.

H One a tyrosinase inhibitor, in a 4% cream can be used safely twice daily for up to 6 months to treat post-inflammatory hyperpigmentation.

H One takes about four weeks on average for the ingredient to take effect.

You shouldn't use products with this ingredient for more than five months at a time.

H One stop application after five months. If your skin lightens, stop using H One regularly and only use it if the dark spots reappear. Wait two or three months to use it in the same areas.

Do not use H One topical on open wounds or on sunburned, windburned, dry, chapped, or irritated skin. Call your doctor if your symptoms do not improve after 2 months, or if your condition gets worse.

Apply the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not apply two doses at one time.

An overdose of H One topical is not expected to be dangerous. Seek emergency medical attention if anyone has accidentally swallowed the medication.

Prolonged regular use of H One may lead to exogenous ochronosis, which can cause blue-black pigmentation and papules, red bumps on the skin.

H One can cause dangerous effects on your heart, especially if you also use certain other medicines. Seek emergency medical attention if you have fast or pounding heartbeats and sudden dizziness

H One produce significant histological alterations that might affect the liver and kidney.

H One can remove the top layer of skin, increasing the risk of skin cancer and cause fatal liver and kidney damage.