P. acnes requires a low oxygen environment to survive and so the influx of oxygen from Benzoyl Peroxide destroys them. Oxygen however is highly reactive, and it binds with the sebum on your face to form a substance called Squalene Peroxide. Squalene peroxide is known to be highly comedogenic – it blocks pores.
Benzoyl peroxide works in two ways: it kills the bacteria that help cause acne, and it has a drying effect that makes it easier to wash away excess oils and dirt. As it does help unclog pores, it might be what you're looking for!
During the first 3 weeks you are using benzoyl peroxide, your skin may become irritated. Also, your acne may seem to get worse before it gets better. If your skin problem has not improved within 4 to 6 weeks, check with your doctor.
It's just a typical side effect, especially during the early stages of treatment. Don't expect any results yet. New pimples at this stage are completely normal. Benzoyl peroxide is a slow worker.
"Even at low levels, benzoyl peroxide kills acne-causing bacteria and opens pores," says Dr. Zeichner. In fact, studies show that high amounts of benzoyl peroxide (the most available is 10 percent) are more irritating but no more effective than their lower-concentrated counterparts.
Its enduring popularity goes beyond its availability and affordability — benzoyl peroxide can help treat inflammatory acne lesions and related scarring. It's most helpful when used together with other treatments, such as topical retinoids.
If you have blackheads and whiteheads, salicylic acid alone should work well to clear out your pores. If your acne tends to be inflammatory, such as papules and pustules, opt for benzoyl peroxide to stop outbreaks at the source. For sensitive skin, start with salicylic acid, since it's less likely to cause irritation.
Generally speaking, dermatologists say purging should be over within four to six weeks of starting a new skin care regimen. If your purge lasts longer than six weeks, consult your dermatologist.
For example, if you suffer from hormonal acne, salicylic acid tends to be effective, while benzoyl peroxide might be all you need if you have garden-variety whiteheads.
Purging is a sign that the product is working and you should continue with the treatment as prescribed. After a few weeks of purging, your skin and acne will have noticeably improved. Breaking out is when your skin is reacting because it is sensitive to something in the new product.
Benzoyl Peroxide and Premature Skin Aging:
Benzoyl peroxide creates free radicals and is known to cause premature skin aging, just like repeated sun exposure or persistent acne.
1 If you're just beginning with your benzoyl peroxide treatment, start using moisturizer now, even before you notice any uncomfortable dryness. You may be able to stave off the worst of it. If you've already succumbed to benzoyl peroxide-induced dryness and flakiness, slather on moisturizer as often as necessary.
Skin purging typically looks like tiny red bumps on the skin that are painful to touch. They are often accompanied by whiteheads or blackheads. It can also cause your skin to become flaky. The flare ups caused by purging have a shorter lifespan than a breakout.
Retinoids such as Tretinoin, acids such as salicylic, and benzoyl peroxide are just a few of the products that cause purging. These products contain active ingredients that increase the skin cell turnover rate, therefore causing your skin to purge.
Benzoyl peroxide is good for all types of acne, including cysts, blackheads and whiteheads, but it's particularly great at treating inflammatory cystic acne.
Yes, you can use benzoyl peroxide and niacinamide at the same time. In fact, many experts suggest teaming highly potent and drying ingredients, such as benzoyl peroxide with hydrating ones, such as niacinamide. With benzoyl peroxide penetrating further into the skin, it can sometimes cause some irritation and dryness.
It is recommended that you use benzoyl peroxide products once or twice each day. If you have sensitive skin or you experience excessive skin redness or peeling, just use the product once each day at night time.
Benzoyl peroxide does not usually darken your skin. Some brown or purplish spots may appear in the acne-affected areas, which are completely normal and part of the healing process. But in rare cases, benzoyl peroxide can cause hyperpigmentation and dark skin.
Benzoyl peroxide works to exfoliate dead skin cells and penetrate deep down to dry up excess sebum and unclog the pores, creating a drying effect. This active ingredient works best on whiteheads and cystic acne.
Benzoyl peroxide can make your skin get dry and peel. To counter that, use a good moisturizer. Avoid products that further dry your skin like astringent toners.
This medication is used to treat mild to moderate acne. It may be used in combination with other acne treatments. When applied to the skin, benzoyl peroxide works by reducing the amount of acne-causing bacteria and by causing the skin to dry and peel.
Benzoyl peroxide is not classifiable as to its carcinogenicity to humans (Group 3).
Can I Use Both Salicylic Acid and Benzoyl Peroxide Together? "It's safe to use both together at low concentrations to attack your acne on all fronts," the dermatologist explains.