Tested: Proto-col collagen tablets, Crest White Strips, Bliss Thinny Chin Chin

I consider myself an indefatigable tester of new beauty products, pills and potions and am happy to share my findings with you, dear reader.

I have been taking Proto-col collagen tablets for two months now. The theory is that we lose more and more collagen from the age of 35 upwards, with resulting slackening of skin tone. The capsules, three a day x 400mg, are supposed to improve skin, hair, joints and nails.

I wasn't sure about the merits of taking collagen like this, in capsule format. I'm aware of collagen injections, but who knows if collagen taken internally does anything for the skin? I have yet to find any official research.

I haven't noticed any real difference to my skin, to be honest. And no improvement to my nails, which have become very weak in past months. But one thing that did improve, after the first dose, was joint pain. I have an elbow which I think is afflicted by repetitive strain injury (it can't be tennis elbow!) and after taking Proto-col, the pain had gone completely. It wasn't permanent, but it does make a difference. I've taken glucosamine/condroitin and green lipped mussel extract and neither of those made any difference.

On another subject, have just been to the US and the inevitable trip to Sephora. There I bought some Bliss Thinny Chin Chin, which is aimed at firming up the decollete and jowls. After applying it for the first time, I can confirm it definitely tightens up the skin: you can feel it doing this. I don't think it lasts long, but good for a party!

Also in the US, I bought some Crest White Strips. You couldn't buy these in the UK the last time I looked, although I believe they're available now on the web. I bought the premium kit. You apply the strips to your teeth twice a day for 30 mins and after seven days you're supposed to see a difference. I had my teeth bleached a few years ago and they've been looking a bit yellow lately so I thought I would try it. I'll let you know how I can get on.