Does Purple Really Make Your Teeth Whiter?

A few published studies talking about microcurrent devices:

Wound care with electrical stimulation:

[tims]

I remember a long time ago, my mother would add something called 'bluing' when she was washing whites. I asked her why and she said blue makes whites look whiter.

[MikeSimoneLV]

I'm so glad you did this video! It didn't seem possible, but I figured if anyone would do a great job explaining the science behind it, it would be you. ❤

[jerotoro]

Even better than just adding blue is using optical brighteners, which absorb uv light and re-emit it as blue, so it's not just white but BRIGHT white. Laundry detergent, paper, and old carpet cleaning products use these all the time.

[lahaya]

this is what we need, people fighting scam ads.

[andywhtwo]

Everything you said was spot on. I painted cars for 15 years. An easy way of reducing the chroma or "saturation" of a certain color tone it's by adding the apposing color on the color wheel. And to make a white look cleaner a blue or purple is an easy way to do so.

[MrSharkBait]

I'm so tired of false advertisement

[Phoenix-tcdp]

you literally just made me understand color theory better then then other artist on this platform

[hamstereyes]

Brave man, putting that stuff on your teeth, your sacrifices for science! Thank you so much for helping me learn. Yes please do the additive / subtractive color video

[julioespindigon]

That ad has kept coming up in my feed and I wondered if it was BS. Thank you for clearing that up 🙏🏼

[cainemarko]

ok... now I'm going to need a debunk video on your sponsor's anti-wrinkle claims... 😉

[SortofMax]

wow! The Action Lab is just so interesting to watch plus i get some extra knowledge from him. Thank you The Action Lab!

[Rompler_Rocco]

Next, let's debunk the electric skincare device and read an ad for purple toothpaste 😘

[RobertoFabrizi]

I'd be up for the substractive color theory followup!

[NukeMarine]

2:34 Love that magical changing shirt.

[THEmickTHEgun]

I'm currently studying IT and have recently done some learning on printers and monitors and I didn't realise how in dept colour theory was. I'm glad you also covered this in this video.

[erikfontaine]

When my daughter was 4, she got a stuffed animal that was yellow. When she brought it to sleep, she freaked out because it had turned black under her dimmed purple night light

[robertprichard]

Let me debunk a BS product while selling another

[seionne]

I imagined the tooth paste working like hair toner, which I know from experience really does make orange-yellow hair more of a platinum blond

[solandri]

First part of your video comes really close to a color perception video I wish you'd do. One that explains the white/gold or blue/black dress. Your brain constantly does an auto white balance (adjustment for the color of the light) based on the expected color of what it sees. It transforms your color perception to match what color it thinks the light is. If a scene or photo lacks sufficient lightning cues, it's possible to get two people to simultaneously see completely different colors. In the dress picture, those who assume the light is white see the dress as white/gold. Those who notice the tiny bit of background in the photo see it is yellow and overexposed. Their brain assumes the light is bright yellow, and they see the dress as blue/black.

[MADARAUCHIHA-oldc]

In india, we use a commodity called ujala, which is actually a purple liquid, in this, we dip our washed white shirts to make it look more brighter__thanks for letting us know the science behind this✌️🙃