Foods, Nutrition and Eczema - Is There a Link?

Eczema, or atopic dermatitis, is a chronic, recurring skin inflammation that appears as blisters that dry to become a scaly, itchy rash. People with eczema often have a personal or family history of allergic conditions such as asthma or hay fever. Exposure to certain irritants and allergens in the environment can worsen symptoms, as can dryness of the skin, exposure to water, temperature changes, stress and some foods.

It’s not clear how important food sensitivities and allergies are in eczema. The effects of foods on the skin are complicated and difficult to assess. Foods that have been associated with making eczema symptoms worse include

• cow’s milk
• eggs
• peanuts
• soybeans
• wheat
• seafood
• fruit with seeds
• chocolate
• food coloring

Also, food additives such as sulfites and MSG may aggravate eczema. However, it is different for every individual, so if you suspect that some foods may be making your eczema worse, you should discuss this with your health care provider who can help you make dietary changes and determine if restricting them in your diet might reduce the incidence and severity of your eczema. Paying attention to what you eat and the effect it has on your skin may help you avoid foods that can provoke eczema flares.

The most reliable way to determine whether you have a sensitivity or an allergy to a particular food is to eliminate the suspected food from your diet for 6 weeks and then reintroduce it back into your diet. If you are sensitive or allergic to it, then your skin rash should clear while avoiding the problem food, and eating the food should again cause the skin rash to return. Always test one food at a time.

How will you know if a food is making your eczema worse? Food sensitivities can occur immediately in some cases and they can be delayed in other cases.

• Symptoms of immediate food sensitivity may worsen shortly after eating the trigger food and can include:
  • itching
  • scratching
  • redness
  • swelling and irritation around the mouth
  • urticaria (itchy, fluid filled lumps on the skin).
• Other symptoms may occur such as abdominal pain, vomiting, wheezing, itchy eyes and sneezing.
• Symptoms of delayed food sensitivity will develop 6-24 hours after eating the trigger food and include worsening of itching and eczema. Sometimes abdominal pain and diarrhea will also occur.

Keep in mind, though, that even if a food sensitivity is proved, excluding the food is unlikely to “cure” the eczema, though symptoms may become less severe. You will still likely need the usual treatments. See your family doctor or dermatologist to find out what the best treatment is for you.

By SkinCareGuide.ca

Psoriasis Facts

Psoriasis is a common, chronic, non-contagious, reoccurring skin condition consisting of red, scaly, well defined, thickened areas of varying sizes. Any part of your skin on the body and on your nails can be affected. Arthritis may be associated with your psoriasis. The scalp, elbows, knees and lower back are commonly affected, but the face is usually not.

Key Points:

• Psoriasis is chronic and reoccurring
• It produces red, scaly, well defined patches
• Psoriasis can affect any part of the skin on your body,
• particularly the scalp, elbows, knees and lower back
• It may include nail involvement and arthritis

Who Can Get Psoriasis?

Psoriasis affects approximately 2% of the population, men and women in any age group can be affected. One type of psoriasis usually begins between the ages of 20 and 30 and runs in families, but the inheritance is variable. A number of genetic associations for example, a gene called HLA-Cw6 has been linked. Approximately 30% of people with this condition also have a first degree relative (that is parents, brothers, sisters and children) with psoriasis.

If you have an identical twin with psoriasis, the chance that you also have the condition is about 70%, while the risk for a twin who is not identical, is about 25%. The severity of psoriasis may vary between family members. For example, one member might have a very mild disease with only a couple of lesions, while another member might be covered with psoriasis. A second type typically begins around age 60 and does not run in families.

What Causes Psoriasis?

Psoriasis is an autoimmune condition involving the T-lymphocyte, a type of white blood cell.

Normally, the time between manufacturing and shedding skin cells is about 28 days. In psoriasis, the process is approximately 7 times faster, the outer cells are poorly formed and don’t shed properly. They tend to pile up on the skin producing the scale.

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Sensitive Skin 101

What is sensitive skin?

Generally if you have easily irritated or reactive skin, then you have ‘sensitive skin’. Most of the time sensitive skin relates to the face. Sensitive skin can be caused by a genetic predisposition or environmental factors. It appears as a redness, a swelling, itchy and dry irritation to the face. One of the major jobs of the skin is to waterproof. This is done to the epidermis or surface layer of the skin, producing a fat-protein sandwich that is always being replaced and is vital to prevent too much water loss from the skin.

Symptoms of sensitive skin include:

• A tingling or tightening of the skin without visible signs
• “Overreaction” to skin care or cosmetic products
• Reactions to shaving, or other physical stress to the skin

Sensitive skin can also be a heads-up for other conditions, such as:

• Altered skin — due to shaving, waxing, medications or heat, cold, wind, and pollution. Also, laser or chemical peels or scar removal
• Allergic skin – the sudden appearance of redness or swelling and itchiness
• Atopic skin – dry skin that is itchy and produces eczema. Eczema is related to hayfever and asthma. (see Eczema Guide for more information)
• Rosacea skin - blood vessels of the face enlarge resulting in a flushed sensation or a redness of the skin

What to do about your skin?

• Perfume or scented creams can be irritating.
• Rinse well after using cleansing products, which should be mild and soap-free as they do not remove so much oil from the skin (www.MildCleanser.ca gives you more information about this kind of cleansers)
• Use a moisturizer and sunscreen that is formulated for sensitive skin
• Don’t over wash your face. Temperature of the water should be tepid; neither hot or cold
• Don’t use exfoliants
• Be aware of seasonal temperatures. The sudden dryness of winter can mean itchy, dry skin until the skin responds by increasing oil production to reduce the water loss
• For breakouts use a cleanser with salicylic acid to help exfoliate pores. There are also moisturizers that contain salicylic acid

Be sensitive to stress

The causes and effects of stress on the body are not fully known, but for some people stress interferes with the body’s systems that repair and regulate the skin. Stress kills your natural antioxidant defenses, which help to prevent accelerated aging of the skin. Hormones can also trigger a histamine release within the skin causing it to erupt in bumpy redness, or breakout in hives.

Desensitize yourself

When choosing makeup, especially foundation and blush, buy oil-free products. Makeup that is water-based won’t clog pores. Look for oil-absorbing foundations that help keep oil off the face.

As for the rest of your body, check ingredients and avoid harsh chemicals in soaps, shampoos, body cleansers and creams, bath oils, bubble baths, etc.

Put your best face forward

• Watch your alcohol intake, spicy foods and caffeine
• Try to avoid excessive temperature changes
• Use the right cleansers, moisturizers and cosmetics
• Manage stress as best you can

Anti-Oxidants And Sun Damaged Skin

Sun damage or photo damage produces both skin cancers as well as photo-aging. Photo-aging shows itself on the skin as wrinkling, scaling, dryness, and mottled pigmentation. Ultra-violet light is absorbed by skin, which in turn produces a photo-chemical reaction.
The UVA light is absorbed by both DNA as well as urocanic acid, the photo-chemical reaction produces oxidation of both DNA, nucleide acid, and protein, as well as lipids, this is known as oxidative damage. Anti-oxidants have been evolved to protect against, and reverse some of the damage produced by sunlight. An anti-oxidant mechanism is very advanced in plants that protect against the damage from sun exposure.

Oxidation:

Oxidation is produced by reactive oxygen molecules. The DNA absorbs ultra-violet light mostly in the UVB (290-320 manometres) range. This produces damage mainly within the epidermis. UVA (320-400 manometres) penetrates deeper into the skin and produces damage in the epidermis, the dermis as well as affecting blood vessels. The UVA has a much more oxidizing effect on cells.

The carcinogenic or cancer forming effects of ultra-violet B produce mutations within the DNA. This initiates tumours within the epidermis. The UVA promotes these tumours as it has much more oxidizing stress on the skin than UVB. It may as a result be more cytotoxic and immunosuppressive.

Sunscreens:

Sunscreens certainly protect against ultra-violet light, the sunburning spectrum is UVB and sunscreens are very effective. Ultra-violet A is the most difficult to protect against. It is important to realize that the SPF numbers are calculated with an amount of sunscreen on skin that exceeds what most of us put on our own skin.

The SPF is calculated with a quantity of 2mg. of sunscreen per centimetre2. Most people will put on about half to one quarter of this when used as sun protection. Unfortunately, low quantities of sunscreen of per centimtre2 will have minimal sun protective effects. Usually if 5mg. per cm.2 of sunscreen is applied to the skin, the sun protective factor is in the region of an SPF of 3.

Anti-Oxidants:

Anti-oxidants play a significant part in the protective and repair mechanisms within animals and plants. This can be achieved by anti-oxidants that are produced within the skin itself or by those consumed or applied from plants. The anti-oxidant effects can be divided into those that have their protection through enzymes, and those that tend to reduce the quantity of hydrogen peroxide as well as lipid hydroperoxides.

Topical Anti-Oxidants:

The use of topical anti-oxidants has certain requirements, these have to be stable as well as being cosmetically acceptable. It is clear that anti-oxidants have a photo-protective benefit. The physiological anti-oxidants include vitamin C, vitamin E, and ubiquinol. Vitamin C is water-soluble and is a free radical scavenger, it is required for collagen synthesis and may inhibit elastin formation in the dermis.

It may also reduce pigment synthesis, as well as enhance epidermal barrier function. For it to be active it must be present on the skin at a pH of 3.5 or lower in order to have an anti-oxidative effect. Vitamin E is different from vitamin C, in that it is lipid soluble, there is evidence that combining vitamin E and vitamin C may be of some benefit. Other anti-oxidants to be considered will be selenium as well as zinc.

Plant Anti-Oxidants:

Plants synthesize vitamin C, vitamin E and flavones, and polyphenolic compounds.

• Silymarin
• Soy isoflavones
• Tea
• Polyphenols

These are all potent plant anti-oxidants.

Silymarin:

This is a Milk Thistle extract, the main component in terms of anti-oxidants is silybyn. This prevents lipid peroxidase action. It also has been shown to inhibit tumour promotion in animals.

Soy isoflavones:

Soy has been connected with a reduction in cardiovascular disease, and in some incidents’ of breast cancer when taken by mouth in large quantities. It has a phytoestrogen effect, which can reduce menopausal symptoms. The isoflavones are genistein and gaidzein. The genistein has a collagen synthesis effect. It is also anti-cancer. It has been used both orally as well as topically.

The genistein is a powerful scavenger of peroxyl radicals. This has a significant reduction in lipid peroxidase activity. It has been shown to reduce redness in the skin of mice which are subject to ultra-violet A. It also has an anti-inflammatory effect. The use of this compound reduces the immune suppression effect of ultra-violet light.

Tea polyphenols:

Tea is fermented initially to green, and then to black tea. The drinking of black tea has been shown to reduce the frequency of squamous cell carcinomas. Work done with green tea both topically and taken orally, shows that it reduces the ability of ultra-violet to produce skin cancers and redness, particularly in animals. The possibility of combining tea, plus vitamin E, to work together as anti-oxidants is interesting.

Much more work needs to be done in order to establish how combining anti-oxidants with sunscreens will have a very beneficial effect on reducing sun damage to skin.

Protecting Your Skin From Sun Damage

Why Use Sunscreen?
There appears to be some confusion about the messages people are getting about sunscreens and why they’re so important. Some use sunscreens to prevent sunburn, whereas others use sunscreens to improve sun tanning. Some wish to avoid the wrinkling associated with sun exposure, and others believe that sunscreens prevent all types of skin cancer, yet others seem to believe that…

What Is A Sunburn?
There are two major types of UV sun damage: UVA-type damage, with light wavelengths of 340-400nm, and UVC-type damage, which includes light wavelengths of up to 340nm. UVA-type damage can cause the skin to tan and may cause very weak burns, while UVC-type damage causes skin to burn.

Frequently Asked Questions About Sunscreen and Sunburns
How Much Sunscreen Should I Apply?
How Often Should I Apply Sunscreen When I’m Out In The Sun?
How Long Before Sun Exposure Should I Apply Sunscreen To My Skin?
Sun Protection Factor (SPF) - What Is It?
Why Is It Important To Use Sunscreens During Childhood?

Anti-Oxidants and Sun Damaged Skin
The UVA light is absorbed by both DNA as well as urocanic acid, the photo-chemical reaction produces oxidation of both DNA, nucleide acid, and protein, as well as lipids, this is known as oxidative damage. Anti-oxidants have been evolved to protect against.

Sun damage or photo damage produces both skin cancers as well as photo-aging. Photo-aging shows itself on the skin as wrinkling, scaling, dryness, and mottled pigmentation. Ultra-violet light is absorbed by skin, which in turn produces a photo-chemical reaction.

The UVA light is absorbed by both DNA as well as urocanic acid, the photo-chemical reaction produces oxidation of both DNA, nucleide acid, and protein, as well as lipids, this is known as oxidative damage. Anti-oxidants have been evolved to protect against, and reverse some of the damage produced by sunlight. An anti-oxidant mechanism is very advanced in plants that protect against the damage from sun exposure.

FAQ on Sunscreens and Sunburns

1. “How Much Sunscreen Should I Apply?”

The average user of sunscreen tends to use significantly less sunscreen than the amount required to achieve the SPF listed on the container.

2. “How Often Should I Apply Sunscreen When I’m Out In The Sun?’”

Many experts recommend that frequent application during sun exposure is required. However, a group of children were tested by spreading on 1 application of sunscreen to one side of their bodies, and four applications to the other.

They then spent 6 hours in the sun. One application provided the same level of protection as four applications, confirming the adequacy of a single daily application of a sunscreen in that situation.

3. “How Long Before Sun Exposure Should I Apply Sunscreen To My Skin?”

As molecules of sunscreen are present in their active state in the sunscreen, sunscreens work immediately upon application. The only reason for application early is to allow absorption into the skin so that the sunscreen is less likely to be washed off, should the person be entering the water. Even so, modern sunscreens are quite resistant to removal from the skin.

4. “Sun Protection Factor (SPF) - What Is It?”

SPF is the ratio of the minimal ultraviolet dose required to produce redness with and without a sunscreen. For example, if it took ½ hour for your skin to become sunburned without any sunscreen, then for a sunscreen that has a 15 SPF rating, you could stay in the sun for 15 times longer (or 7.5 hours) before you get sunburned. This is provided, of course, that you’ve applied the sunscreen properly so that you’re getting the prescribed protection.

5. “Reactions To Sunscreens?”

Sunscreens can be both an irritant and an allergen, though allergic reactions are rare. Irritant reactions, however, abound. One classic error in sunscreen application is to put a large amount of sunscreen on the forehead. Perspiration and gravity can cause the sunscreen to migrate down your forehead into your eyes, causing a stinging sensation. Some people attribute this to an allergic reaction and discontinue use. It’s also important to wash your hands after applying sunscreen, since rubbing your sunscreen covered finger near your eyes can induce an irritant reaction.

6. “Why Is It Important To Use Sunscreens During Childhood?”

It appears that a great deal of time can elapse between actual sun damage and the development of skin cancer or other skin problems like photoaging. Therefore, it is important to protect your skin from an early age when you are out in the sun.

7. “Sunscreens And The Elderly?”

Many elderly people can become quite obsessed by sun avoidance, and their quality of life can suffer. Sometimes, if they are diagnosed with an actinic keratosis or basal cell carcinoma, they can become anxious and almost leap from shadow to shadow. However, few of them are likely to develop new skin cancers from present sun exposure. As long as they are prudent about avoiding excessive sun exposure and protecting their skin to prevent sunburn, they can continue to enjoy time outdoors.

8. “Can Sunscreens Prevent Cancer?”

There is clear evidence that sunscreens are helpful in preventing actinic keratoses, which are warty lesions that can occur on sun-exposed skin of the face or hands. Research has shown that these lesions can develop into a cancer called squamous cell carcinoma, and that this is linked to a cumulative exposure to the sun.

However, there is surprisingly little evidence that sunscreens have much effect in preventing another kind of skin cancer called basal cell carcinoma, or for malignant melanoma. For malignant melanoma and for basal cell carcinoma, the character and timing, that is, the type of sunlight and your age at the time of the exposure to the sun appears to be more important than the cumulative dose.

Adapted from an article by David I. McLean, MD, and Richard Gallagher, MA.