A key fear is around aluminium in deodorants potentially causing cancer. The theory is that aluminium compounds such as aluminium chlorohydrate or aluminium zirconium, used to stop sweating, can be absorbed through the underarms and cause breast cancer. Dr Olioso says: 'I suspect this is more a case of people becoming more aware of and getting used to their own smell and how much they sweat - things they may have become dissociated from because of many years of using conventional products.'

The base ingredients include tapioca starch for moisture absorption and sodium bicarbonate for odour control. It also contains a range of natural fragrances including patchouli oil. There are several scents to choose from. Ingredients: Aqua (Water), Ammonium Alum, Aloe barbadensis leaf juice, Citrus grandis (grapefruit) seed extract, Glycerin, 2-bromo-2-nitropropane-1, 3-diol, Phenoxyethanol, Potassium sorbate, Sodium benzoate, Limonene*

Natural moisture absorbers, such as tapioca starch, arrowroot and kaolin clay, are typical ingredients used in these products, along with antibacterial ingredients such as baking soda, citric acid and ammonium alum, which prevent odours.

Try different brands and strengths until you find one that suits you. Opt for mini bundles if you want to try out a few scents or different options to find the best fit for you. It's worth remembering that natural ingredients can still cause skin reactions. For example, bicarbonate of soda can irritate the skin and cause itchiness, especially if used after shaving, and some essential oils that are commonly found in natural deodorants might also cause skin irritation.It is essential that PitROK is applied to freshly cleaned skin, therefore always use immediately after your bath or shower. Apply to underarms or feet. Do not apply to broken skin. The deodorant is applied using your fingers, although you can also buy a small bamboo spatula (50p) to get it out of the jar. There are no added extras here - just crystal in a box. So if you're after a no-frills eco deodorant product that will last for six plus months (if you look after it) for not much outlay, this could be the one for you. Some people might still prefer to opt for aluminium-free products, and if you're keen on plastic-free deodorant you might not have any choice, as most are aluminium-free. A gentle but effective deodorant based on pure natural mineral salts that provides day-long protection against body odour without causing underarm itching and skin irritation.

None are true antiperspirants, so you will have to make your peace with a certain level of wetness. I never realised it was conventional deodorant that caused this, but my underarms used to itch so much at times. Now, it's completely stopped!I would definitely recommend this product." Claims also suggest that this plugging of sweat ducts with certain aluminium compounds prevents the body ridding itself of potentially carcinogenic substances absorbed during antiperspirant use. Formulated with Aloe Vera and Grapefruit seed extract it leaves your skin feeling fresh and revitalised. Subscription 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.You can buy the crystal on its own, or the company also sells one encased in a plastic base. In both cases, you wet the product slightly before use or rub it on to damp skin. The base ingredients in Wild deodorant includes tapioca starch to absorb moisture, and sodium bicarbonate to control odour. Extracts of essential oils provide the fragrances. If organic credentials are important to you, look for a Soil Association certified brand - either a COSMOS Organic logo or COSMOS Natural logo (where products contain lots of ingredients which cannot be organic, such as water, salt or clay, but might contain organic ingredients, too). There are also fears that aluminium found in everyday items such as aluminium cans, antacids and antiperspirants could cause Alzheimer's. But the Alzheimer's Society says: 'No convincing relationship between amount of exposure or aluminium in the body and the development of Alzheimer's disease has been established.'