Cart

Your cart is empty

Continue shopping now

Your Comprehensive Guide to SPF

Sporty & Rich Wellness - Your Comprehensive Guide to SPF
By: @dermahealthnutrition

 
Relaxing in the warmth of the sun is undoubtedly enjoyable, but are you aware of the potential risks? Protecting your skin from harmful rays is essential to prevent sunburn, reduce the risk of skin cancer and premature ageing. Here's what you need to know:

UVA vs. UVB vs. Blue Light

UVA, UVB and blue light are different components of the electromagnetic spectrum with varying effects on the skin. For example, UVA rays have longer wavelengths and penetrate deeper into the skin than UVB rays. UVA is present throughout the year and can pass through clouds and windows, and it's primarily linked to skin aging (remember “A" for ageing). UVB rays have shorter wavelengths and primarily affect the outer layer of the skin. They are the main cause of sunburn and play a significant role in the development of skin cancer (remember: “B" for burn). UVB is more intense during midday and summer months, and the intensity increases with increasing altitude. Blue light has recently sparked interest since it's not only emitted by the sun, but by electronic devices like smartphones, tablets, and computer screens. Research suggests that excessive exposure to blue light may contribute to skin aging and hyperpigmentation. Your sunscreen should therefore have a broad-spectrum filter to ideally protect against UVA, UVB and blue light.

Sun Protection Factor (SPF)

Sun Protection Factor (SPF) is a numerical rating that indicates a sunscreen's effectiveness in blocking UVB rays, but it does not measure protection against UVA or blue light.

SPF measures the degree to which a sunscreen extends the time it takes for UVB rays to redden the skin compared to unprotected skin. Higher SPF values provide greater protection. If your skin would redden after 10 minutes in the sun without sun protection, SPF 30 would prolong this time by the factor 30 (10 minutes x SPF 30 = 300 minutes).

SPF 15 vs. 30 vs. 50

There is no linear relationship between SPF and protection. For example, SPF 15 filters out about 93% of UVB rays, while SPF 30 filters out about 97%. The increase in protection becomes less significant as the SPF value increases. However, from a dermatological point of view, I recommend using SPF 50.

Chemical vs. Mineral Filters

Two main types of SPF filters —chemical and mineral— shield the skin from UV rays differently. The choice ultimately depends on individual preferences and needs. 

Chemical filters work by absorbing UV radiation and converting it into heat energy. These filters are often transparent and provide a lightweight and cosmetically elegant application. Mineral filters act as physical barriers that reflect and scatter UV radiation away from the skin. These filters are often referred to as physical or inorganic filters. They are less likely to cause skin irritation or allergic reactions compared to chemical filters, but depending on the formula, may leave a white cast on the skin. Thus, individuals with sensitive skin or a history of skin allergies may be more prone to irritation from chemical filters. I also recommend babies and children should use mineral filters.
 
Sun Protection Facts From Your Dermatologist:

1. People with darker skin are not protected from sun damage or skin cancer. Everyone, regardless of skin tone, should prioritize sun protection to maintain healthy skin.

2. Reapplying sunscreen does not prolong your maximum daily protection time. However, reapplication is advised every 1-2 hours and especially after a swim or rubbing the skin with a towel to maintain the initial time of protection.

3. Avoiding the sun in the shade and wearing dark, thigh-fitting textiles/hats/glasses offer a greater protection from sun compared to the use of sunscreen.

4. Sunscreen should be applied as the last step of your individual morning skincare routine (after cleansing, cream, and optional serum). Wait 1 to 2 minutes between each layer to improve cosmetic results.

5. While there are various cosmetics products on the market that contain SPF, two separate products (face cream and SPF) are recommended from a dermatologic standpoint to guarantee a better coverage and protection.

6. The advised amount of sunscreen for adults might be more than you think. The fingertip unit (FTU) is a simple dosage guide. One unit refers to a strip of product squeezed onto the index finger from the tip to the first crease: face and neck: 2.5 FTU; one arm: 3 FTU; one leg: 6 FTU, entire body: 40 FTU.


References: 
-Kohli I, Nicholson CL, Williams JD et al. Greater efficacy of SPF 100+ sunscreen compared with SPF 50+ in sunburn prevention during 5 consecutive days of sunlight exposure: A randomized, double-blind clinical trial. J Am Acad Dermatol 2020; 82: 869-877
-Schneider SL, Lim HW. Review of environmental effects of oxybenzone and other sunscreen active ingredients. J Am Acad Dermatol 2019; 80: 266-271
-Young AR, Claveau J, Rossi AB. Ultraviolet radiation and the skin: Photobiology and sunscreen photoprotection. J Am Acad Dermatol 2017; 76: S100-S109
-Guan LL, Lim HW, Mohammad TF. Sunscreens and Photoaging: A Review of Current Literature. Am J Clin Dermatol 2021; 22: 819-828
-Tsai J, Chien AL. Photoprotection for Skin of Color. Am J Clin Dermatol 2022; 23: 195-205

Previous
Next

The Wellness Club

The Health Benefits of Ghee

The Health Benefits of Ghee

Translation missing: en.blogs.article.by Taylor Davis

By: @islandem_ Ghee, or clarified butter, is the product of slowly heating cow’s butter to 100°C until the fat, milk protein (casein), and sugar (lactose) separate. The protein and milk are...

Read more
The Power of Napping

The Power of Napping

Translation missing: en.blogs.article.by Taylor Davis

By: @inceipek1 In today's fast-paced world, where work schedules are demanding and screens keep us connected around the clock, finding time to rest and rejuvenate has become increasingly challenging. However, one simple yet highly effective practice that offers us a potential solution is napping. Often underestimated, napping holds a plethora of benefits for both physical and mental health. The Science Behind Napping

Read more
Should You Workout on an Empty Stomach?

Should You Workout on an Empty Stomach?

Translation missing: en.blogs.article.by Taylor Davis

By: @coreflexpilates founder Chris Bardawil  This is a topic that has so many variables but this article will give you some real world experience and ideas on how you can come to your own conclusion when it comes to working out on an empty stomach. The first thing to consider...

Read more
5 Mental Health Benefits of Exercise

5 Mental Health Benefits of Exercise

Translation missing: en.blogs.article.by Taylor Davis

By: @coreflexpilates founder Chris Bardawil  Most of us know about the physical benefits of exercise: improved posture, weight management, increased energy, looking stronger...but what about the psychological benefits of exercise? Here are five key benefits your mental health will get from regular exercise.  Better Sleep: Exercise can help regulate our circadian rhythm which is our body's internal clock that influences when we feel tired and when we feel...

Read more
Nourishing The Mind: How Nutrition Impacts Mental Health

Nourishing The Mind: How Nutrition Impacts Mental Health

Translation missing: en.blogs.article.by Taylor Davis

By: @inceipek1 The saying "you are what you eat" holds more truth than we might realize, especially when it comes to our mental health. The connection between nutrition and mental well-being is a complex and intricate web, with scientific research increasingly highlighting the profound impact that our dietary choices can have on our mood, cognition, and overall mental...

Read more
Sporty & Rich Wellness

Understanding the Complexities of Histamine Intolerance

Translation missing: en.blogs.article.by Taylor Davis

By: @dermahealthnutrition Histamine plays several important roles in the body, including regulating gastric acid production, controlling blood vessel dilation, modulating immunity and response to allergens. Histamine is found in varying amounts in almost all foods. Histamine intolerance results from an imbalance between histamine intake and histamine metabolism in...

Read more
A Root Cause Approach for Treating Perioral Dermatitis

A Root Cause Approach for Treating Perioral Dermatitis

Translation missing: en.blogs.article.by Taylor Davis

By: @drmelissa.co Dermatitis is a term that describes general inflammation of the skin. While it is relatively easy to diagnose, discerning the cause can be challenging; typically there are a plethora of factors that come together to cause this condition. Perioral dermatitis (PD) is general inflammation of the skin around the mouth (“peri”...

Read more
A Look Into What a Naturopath Eats in a Day

A Look Into What a Naturopath Eats in a Day

Translation missing: en.blogs.article.by Taylor Davis

  By: @drmelissa.co What I eat in a day is a topic I consistently am asked about and I often hesitate to share because no two people are alike and I believe there is no one-size fits all approach when it comes to diet and overall health. What works for me may not work for anyone else. I...

Read more
Sporty & Rich Wellness

Adverse Reactions to Food: Allergies versus Intolerances

Translation missing: en.blogs.article.by Taylor Davis

By: @dermahealthnutrition Many food-related symptoms are mistaken for "allergies" when in fact they may be food intolerances. Food allergy and food intolerance are two distinct reactions with unique characteristics in terms of their underlying mechanisms. Accurately distinguishing between the two conditions is crucial for effective diagnosis and treatment, and ultimately for improving the wellbeing of those affected.

Read more
Sporty & Rich Wellness

5 Mental Health Benefits of Exercise

Translation missing: en.blogs.article.by Taylor Davis

By: @coreflexpilates Many of us know about the physical benefits of exercise, but what about the psychological benefits of exercise? Exercise can help ease anxiety and depression, improve your sleep and keep your memory in check. Here are five benefits your mental health will get from regular exercise. Better Sleep - E

Read more
Irregular Periods: What Do They Mean?

Irregular Periods: What Do They Mean?

Translation missing: en.blogs.article.by Taylor Davis

By: @drmelissa.co A woman’s period is a vital sign. Just like your blood pressure, heart rate, temperature, and breath rate, a woman’s cycle is indicative of her health overall. An imbalanced period indicates suboptimal health.  The menstrual cycle is incredibly complex and requires a constellation of factors to align for it to occur at regular intervals. Factors that can delay a period or cause it...

Read more
Micro-Needling with PRP for Facial Aging

Micro-Needling with PRP for Facial Aging

Translation missing: en.blogs.article.by Taylor Davis

By: @drmelissa.co Facial treatments that slow and treat the signs of ageing have become increasingly popular as an alternative to, or in conjunction with, more invasive methods like injectables and surgery. Micro-needling is one I am frequently asked about, as it can benefit the skin’s appearance, soften fine lines and improve overall texture and plumpness — but

Read more