Using too much of the product can often cause undesirable effects like peeling and dryness. The recommended amount is about a pea-sized drop for the entire face.
“Studies suggest you need to use at least 0.25% retinol or 0.025% tretinoin to be effective, so I recommend using a product that specifies the percentage.” When choosing a retinol product, Dr. Rogers says it's best to start with the lowest concentration before moving up. Another thing to consider is your skin type.
“If you're overusing your retinol, or if you're using a retinol that's too strong for you, it can lead to peeling, irritation, and excessive dryness, which may have led to retinol's association with skin thinning,” she says.
Retinoids work best if you use them daily. Specifically, they should be used at night because some types are deactivated by light and air. It's important to start slowly and allow your skin time to adjust. Using too much too quickly can cause redness, dryness, and irritation.
The Recommended Dietary Allowance (RDA) for men and women is 900 and 700 μg retinol activity equivalents (RAE)/day, respectively. The Tolerable Upper Intake Level (UL) for adults is set at 3,000 μg/day of preformed vitamin A. There are a number of sources of dietary vitamin A.
It may seem surprising, but even small percentages of retinol can benefit your skin. Percentages of 0.01% retinol or greater are proven to be effective at improving multiple signs of ageing, reducing pore size and improving the overall health of your skin.
A formula with retinol, like the L'Oréal Paris Revitalift Triple Power Eye Treatment, should be applied after your serums and before moisturizer due to its consistency.
Rouleau says the best time to use a scrub is in the morning. Overnight you've loosened up dead skin cells with your glycolic acid or retinol products, making the morning a perfect time to brush them off.
Don't Mix: Retinol with vitamin C, benzoyl peroxide, and AHA/BHA acids. AHA and BHA acids are exfoliating, which can dry out skin and cause further irritation if your skincare routine already includes retinol. As for benzoyl peroxide and retinol, they cancel each other out.
The truth: You can use vitamin C with retinol and retinoids. Get them as separate products so you can tailor the concentration of each and use them at the right time of day. Although vitamin C can be used day or night, it is ideal for daytime use, while retinol and retinoids should be applied at night.
Should you use retinol under your eyes? Yes, definitely. While it is true that retinol – a form of vitamin A – is a powerful ingredient and the skin under your eyes is delicate, there's no reason why you should miss out on the amazing benefits of retinol.
Later studies evaluated Tretinoin 0.05%. While both were equally effective over a one year period, Tretinoin 0.1% was able to achieve cosmetic improvement in 6 months while 0.05% required closer to 12 months. Finally, 0.025% was compared to 0.1% and it was found that both produced similar improvements in photoaging.
0.3% – a relatively low but effective dose of retinol. "0.3% retinol is enough to give a good effect but also enough not to put the skin at risk or irritate the skin," continued Abi. "There are creams out there formulated at 1% and 2% but in my experience consumers don't always use retinol properly.
1. SkinCeuticals Retinol 1.0 Maximum Strength Refining Night Cream. Formulated with the highest concentration of 1.0% pure retinol and botanical extracts, this cream is enhanced with the latest stabilization and delivery technologies to preserve retinol potency and ensure maximum efficacy and stability.
Use Exfoliants Sparingly After the Adjustment Period
After two to six weeks of using tretinoin, it's usually okay to start using an exfoliant. However, it's best to use exfoliating products as sparingly as possible while using tretinoin to avoid potentially irritating your skin.
Retinol (leave to absorb for 10-20 minutes)
Retinol is also an ingredient that should be left to absorb sufficiently into the skin before following up with another product. “It is important to leave a 10-20 minute wait time before applying the next product.
Can you use retinol every day? Start slow. If you're a new user, your skin may only be able to tolerate retinol once every other day or so. As your skin gets used to retinol, you can apply it more often.
Apply topical retinoids
Retinoids, which are topical vitamin A-based derivatives, may help reduce fine lines and wrinkles by increasing collagen production. If you use retinoids on your face, extend the treatment area to your neck and chest at night. Retinoid products are available by prescription or over the counter.
Mix It Up. One tip to help your skin adjust to retinol is to mix your retinol with your face moisturizer and then apply it to your skin. This allows the retinol to be a little gentler on your skin, which is great if you have sensitive skin.
Generally speaking, I recommend most people start using retinol in their mid to late-20s, anywhere from 25-30. This is when collagen and elastin production starts to slow down, so it's the perfect time to start reaping the preventative-aging benefits retinol has to offer.
Each IU Vitamin has its specific mass of millimeter which differ from vitamin to another, and to convert from IU to Mg you must know the converting value. Vitamin E: 1 IU is the biological equivalent of about 0.67 mg d-alpha-tocopherol, or 0.9 mg of dl-alpha-tocopherol.
If the RDA for vitamin A as a retinol preparation is 3,000 IU, the equivalent in micrograms is 900 µg. Converted to milligrams, this amount equals 0.9 mg.
Quick Reference. The vitamin A content of foods is expressed as retinol equivalents, i.e. retinol plus carotene; 1 µg retinol = 6 µg β‐carotene = 12 µg other active carotenoids = 3.33 international units. See also retinol activity equivalent.