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Black Salve

Author: Dr David Shaw, a skin and cosmetic GP at Kingscliff Health medical and allied health centre in Kingscliff, NSW. 

I often get asked “What do I think of Black Salve”?  This question is often loaded with a built-in anti-doctor bias so I need to choose my words carefully.

Now we doctors certainly don’t know everything and we are not saints, but I’ll give you my best shot at this one!

Black Salve (BS), aka Cancema is a blanket term for any topical paste typically consisting of zinc chloride (largest ingredient), bloodroot and sometimes other botanicals.  The recipe is not standardised so its difficult to compare products and you can’t really be sure what you are actually getting in that mail order.  The zinc and toxic alkaloids from the botanicals cause tissue destruction. So yes, if the tissue destruction coincides with the borders of your skin cancer then it will ‘cure’ the cancer.  But this is where things get complicated.

It is regularly claimed by proponents  (ie. product manufacturers and sellers) that  BS can actively seek out and selectively destroy cancer cells much like a chemotherapy drug.  However laboratory studies have demonstrated that it is at least as toxic the normal skin and tissue cells.  It is also claimed that it won’t ‘react’ on the skin (ie. destroy tissue) unless it is applied to a cancer.  There is no evidence to suggest this is the case.  Moreover, I have personally seen many instances of BS ‘reacting’ when applied to scar tissue, normal skin and other benign skin lesions.  So again, the properties of BS appear to be, shall we say, overstated.

Also of great relevance is the considerable variation in the biology of individual skin cancers.  Some low grade skin cancers may completely resolve if most of the cells are destroyed.  However, higher grade skin cancers will recur and may aggressively spread locally or even to other parts of the body if even a few cells remain after treatment.  Recurrence is often in the deeper layers of the skin where the BS couldn’t penetrate down to and thus will not be detected until it has grown to a large size. So you may get lucky and ‘cure’ your skin cancer with BS.  However, there is no way to determine if you have done so and you are running a significant risk of recurrence which may require extensive surgery or even be inoperable and life threatening.  There are many documented cases where this has occurred.   In addition I have seen major scarring and ulceration after BS application.

What do I advise clients who wish to use BS?  Firstly, I don’t think BS conveys any advantage over treatment modalities that a good skin doctor can perform other than the ability to DIY.  I recognize that this is important to some people.  So if you must use BS, please be safe!  It is imperative that you get your spots properly diagnosed and assessed for suitability for BS.  Once BS has been applied, there is no way to determine the nature of the original lesion.

So in summary, skin cancers can be very serious.  BS is not a ‘natural’ product (zinc chloride is the main ingredient) and it is not safe to use without the assistance of an experienced skin doctor.

Dr David Shaw is a highly experienced skin and cosmetic GP with areas of interest in dermatology, skin cancer checks, skin cancer surgery, and cosmetic injectables. Book an appointment online with Dr David Shaw or call us on 02 6670 1400.

* The information provided in this article is for educational purposes only and not intended to be a substitute for professional advice. You must consult your doctor before acting on the information in this article, especially if you have concerns regarding health related issues for yourself and your family.

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Skin Type & Sun Exposure: What you need to know.

Author: Dr David Shaw, a skin and cosmetic GP at Kingscliff Health medical and allied health centre in Kingscliff, NSW. 

Ok, lets start with the obvious – fair skin generally has a higher skin cancer risk.  However, some people with darker skin may be unlucky enough to have a different genetic predisposition to skin cancer.

Melanin, the pigment in skin, absorbs UV rays from the sun which may otherwise cause skin cancer and photo-ageing (pigmentation, thinning and fine wrinkles).  As an added bonus, darker-skinned individuals also have a greater ability to repair sun-related DNA damage.  

So are there any benefits from having fair skin?

Yes! Fair skin is better at using the sun’s UV rays to synthesize Vitamin D.  This is really important as Vitamin D is essential for many body functions including bone health and mood.

Fair skin is also better at regulating the immune system through very short sun exposures.  Science has recently discovered that small amounts of sun exposure will damp down immune system overactivity thus reducing or preventing some autoimmune conditions.  This is a ‘watch this space’ area where new research discoveries are ongoing.

Dr David Shaw is a highly experienced skin and cosmetic GP with areas of interest in dermatology, skin cancer checks, skin cancer surgery, and cosmetic injectables. Book an appointment online with Dr David Shaw or call us on 02 6670 1400.

* The information provided in this article is for educational purposes only and not intended to be a substitute for professional advice. You must consult your doctor before acting on the information in this article, especially if you have concerns regarding health related issues for yourself and your family.


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Which Sunscreen Should You Use?

Author: Dr David Shaw, a skin and cosmetic GP at Kingscliff Health medical and allied health centre in Kingscliff, NSW. 

I’m often asked this question.  Of course, there is a short and a long answer.

The short answer is that the best sunscreen is the one that’s on your skin and applied correctly.  An expensive sunscreen will do you no good in your beach bag!  So find a product that you are actually prepared to use and apply it 15 minutes prior to sun or water exposure (to allow it to absorb into the surface oil layer of the skin) and reapply at least every 2 hours.

What about the long answer?

Ok, well I use the light blue ALDI squeeze tube (sensitive skin).  It has a combination of zinc and chemical UV absorbers but no known hormone disrupters (PABA, methoxycinnamate or paraben preservatives) or the toxic to coral oxybenzone.  And it’s cheap so you don’t have to skimp!!   I can assure you that it works and it’s not overly greasy.  And no, I have no pecuniary interest in Aldi (unfortunately).

You may prefer zinc-only sunscreens so as to avoid any chemical UV absorbers.  That’s quite reasonable.  The trade-off is that you will either have a nano-particle zinc sunscreen that rubs in reasonably well (such as ‘Invisible Zinc’)  or the non-nano zinc products that have that thick white appearance (such as Banana Boat Zinc).  There has been plenty of discussion regarding potential problems with nano-zinc products.  I’m personally yet to be convinced that there is a problem but sometimes you don’t know what you don’t know!!

There are also some high end products that will be less greasy and pore-clogging and that self-spread to a degree so as to avoid the patchy nature of a typical application.    But you will pay for the privilege! 

Dr David Shaw is a highly experienced skin and cosmetic GP with areas of interest in dermatology, skin cancer checks, skin cancer surgery, and cosmetic injectables. Book an appointment online with Dr David Shaw or call us on 02 6670 1400.

* The information provided in this article is for educational purposes only and not intended to be a substitute for professional advice. You must consult your doctor before acting on the information in this article, especially if you have concerns regarding health related issues for yourself and your family.

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