Safe, paraben free natural crystal based deodorants. Which is the best and most reliable ?

A close relative was diagnosed with Cancer last year and thankfully over came it and is doing great I'm pleased to say . 

When we found out she'd  been diagnosed with Cancer I tried to do as much research into cancers as possible - especially the breast cancer that she had . The specialist and consultants didn't really seem to go into the causes of why it may have happened, but I seriously think deodorants in the armpit areas are a serious cause got concern . It's not just women either, it's men too, I have 2 male  patients at work who have breast cancer. 

The skin & tissue around the breast is very delicate but also absorbs things very easily . Which makes it the perfect place for chemicals such as the toxic ones (aluminium Etc )  found in some deodorants to hide and build up. 

The deodorants I've been using (along with 3 others that I don't have in the picture as they've run out) are ; 

Biosen, crystal , Alvin Connor , Toms of Maine . 

The only one I don't like as much as the others Is the Biosen stick , it doesn't seem to have the lasting power. 

I think the best one for cost and because its most natural Is the Alvin Connor - it's in a glass bottle with loose crystals, which you fill with water & it's a pump spray . It's £7.99 and lasts 6-8 months . 

The Crystal roll on Is good but it doesn't last as long, I seem to get through one ever 6 weeks - they're £3.89 from Boots 

The Toms of Maine in stick form ( I've had every scent ) is good but doesn't last all day if your super busy, but the texture is lovely , and the lemon & cucumber one is so good!!!! 

The Biosen deodrant is good but I don't like aerosols too much and it's not as pure as it could be .... 

I've also tried the Jason ones, and they are nice .

What's your favourite safe deodrant brand ?