Not long ago, I met a lady at a dinner party who mentioned at one point that she did everything she could to avoid titanium dioxide.
"Really?" I asked, "for what reason?"
"Because it's toxic" she replied, looking at me as if I had just dropped in from another planet.
I was a little surprised.
I was actually also a little impressed.
Titanium dioxide is a pretty difficult substance to avoid. Just glancing around the room, I made a mental note of things containing titanium dioxide; the white napkins on the table, the tablecloth, the white walls, her white belt and matching baubles, the serving bowls on the table, and the tattoo on her arm were all likely candidates.
I didn't have the heart to mention this to her. I didn't want to cause her any more distress than she already seemed to have about titanium dioxide. Her comment inspired me to do a bit of digging though.
The World of WhiteWe humans use quite a bit of this pigment otherwise known as 'the whitest white' or 'the most perfect white'. As a matter of fact, titanium dioxide accounts for 70% of the worlds total pigment production.
Almost 4.6 million tons of it is produced and used annually.
You'll find titanium dioxide in paint, food coloring, toothpaste, varnish, paper, plastic, ceramics, glass, skimmed milk (yes, really), concrete, tattoo pigment, eye shadow, lipstick, vitamin pills, candy, and in just about every sun cream and sunblock on the market.
Since my original post (in 2010), titanium dioxide has been the subject of focus and has had the big bad 'C' word (carcenogenic) attached to it.
Let's have a look at why.
What The FDA SaysThe FDA states that titanium dioxide – when used in cosmetics and 99% pure – is approved by and listed as a safe ingredient with no known adverse effects.
It is not listed as a carcinogen or toxin.
Neither is it linked with any contact dermatitis.
That sounds pretty reassuring.
So How Did It Get Associated with The C Word?It's not so much the titanium dioxide as its particle size. In recent years, titanium dioxide has become available in a wide range of particle sizes. Some of which are less than 0.1 microns. A titanium dioxide particle that measures under 0.1 microns is a nano-particle.
In many ways, nano-sized titanium dioxide revolutionized sun protection products. It's quite simply a fave for sunscreens of all types.
If you're old enough, you may remember a time when applying sun lotion meant battling a glob of white goo that took ages to rub in before there were no telltale white streaks on the skin.
Enter nano-particle-sized titanium dioxide.
Sun product manufacturers have magically succeeded in making it less cumbersome for all of us to use sunscreen.
Cool and Maybe Not so CoolThe cool part about using nano-sized titanium dioxide in sunscreen is that it's just as effective a sunscreen as it used to be – but now it's easier to apply.
The maybe not so cool part is that nano-sized might mean effortless skin penetration. Effortless skin penetration might mean other effects that haven't been discovered, studied or tested yet.
American Cancer SocietyIn July 2013, the American Cancer Society discussed the pros and cons of titanium dioxide in sunscreens and concluded that "sunscreen is a necessity to avoid the dangerous UV rays from the sun."
They don't warn against titanium dioxide as an ingredient, but rather advise "if you're concerned that nanoscale titanium is a risk' to choose a sunscreen that doesn't include T-dioxide".
At the same time, they advise choosing "the product that works best for you".
The hitch: At present, there are no requirements for manufacturers to declare whether or not they are using nano-particle sized t-dioxide in their products. So it really is up to you to decide what you think.
*(to my knowledge – please do leave a comment if you have info to the contrary!)
If you still want to avoid titanium dioxide (or at least the nano-sized T-dioxide), choose sunscreen without titanium dioxide.
Particle Sizes ChartMeasurement Description – Particle Diameter Size
Coarse – less than 10 microns
Fine – less than 2.5 microns
Ultra fine or nanoparticles – less than 0.1 microns (or 100 nanometers)
Bonus Info: In food coloring, titanium dioxide has the number E171
Extra bonus info: I have sent a thank you to the lady who inspired this blog post .
More InfoSwissinfo.ch: health concerns raised over nanoparticles
The Organic Make-up Company - Titanium Dioxide - Toxic or Safe?
Canadian Centre for Occupational Health and Safety - Titanium Dioxide Classified as Possibly Carcenogenic to Humans
International Agency for Research in Cancer
Wikipedia - nanoparticles
American Cancer Society - on sunscreen with titanium dioxide
DIY Cosmetics: Mineral powders and nano particles