We've rounded up the key players, costs, eco and ethical claims, and some insights from users to help you decide.

Natural deodorants are claimed to be kinder to skin by using largely naturally derived ingredients. Aluminium spray cans often have some plastic parts, such as nozzles and lids, that are harder to recycle, while aerosol sprays have their own environmental implications.Helps moisturise the skin: Formulated with natural moisturising factor, this deodorant helps moisturise your skin while keeping you fresh and odour-free. The company says its products are 100% natural, free from preservatives, alcohol, artificial fragrance and palm oil, and are registered with The Vegan Society. The use of crystal deodorants isn’t a new discovery: according to historical texts, the Romans were well aware of deodorising effect of alum.

To keep it equal, and hopefully to appeal everyone’s lifestyle, I’ve kept a fairly strict criteria and rating scale of how I’m reviewing these deodorants.

I wore Salt of the Earth’s Natural Deodorant Crystal for 6 weeks, and here’s how I found it. Today we’re talking in-depth about sweaty pits and body odour. Lovely. Certified COSMOS Natural by the Soil Association. It’s also certified by The Vegan Society and Leaping Bunny approved. This deodorant is gentle on your skin and formulated with natural mineral salts, magnesium, aloe vera and rosemary leaf extract. Whatever your stance on skincare products and the chemicals they contain, one thing's for sure: the skin is the largest organ of the body, so what we choose to put on it will have an impact. And that includes our deodorants. However, these particular salts only have a deodorising effect, and sit on the skin, whereas aluminium chlorohydrate and aluminium zirconium are antiperspirant ingredients that plug pores to prevent sweating.

With that in mind, let’s dive into the Salt of the Earth Crystal Deodorant review! My 2 Month Crystal Deodorant Review Week 1 & 2 – Adjusting to a natural deodorant The deodorant is applied using your fingers, although you can also buy a small bamboo spatula (50p) to get it out of the jar. Some might react to the bicarbonate of soda. One user told us: 'My girlfriend said it was really good, but it irritated her skin after a few months due to the bicarbonate of soda in the ingredients.' Another user told us they found it effective, and that the initial itchiness from the bicarb settled down after a few months. So you might need to give it a trial to see if it works for you. I dropped it from about waist height, so I would expect it to probably break up a bit more if dropped from a greater height. Week 7 & 8 – I took it to a music festivalSubscription deodorant might seem a bit unusual, but you can pause, edit or cancel the subscription at any time, and adjust deliveries or swap scents to suit you. It’s now mid-late July, and the news has just landed that the UK is about to experience the hottest temperatures ever recorded. Whilst being very dispiriting that we still have climate-change doubters, it was a good opportunity to test out how the Salt of the Earth Crystal Deodorant handled humidity and 30°C+ weather. NATURAL DEODORANT - Certified COSMOS Natural. Formulated without synthetic additives, the Salt of the Earth Unscented Natural Deodorant Spray is 100% natural, gentle on your skin and made from a mix of natural mineral salts, essential oils and aloe vera. The brand claims Akt, developed by two West End dancers, has been tested on more than 1,000 professional dancers and athletes. It's claimed to be plastic, aluminium and cruelty-free and to absorb both wetness and odours (although it stops short of classing itself as an antiperspirant). This fragrance-free vegan deodorant (or 'anti-odorant' as it calls itself) comes in the form of a tube of cream that you apply to the underarms by hand.