Native to Australia, macadamia nuts, sometimes known as the Australian nut or Queensland nut, is popular in both cooking and cosmetics. Macadamia nut oil provides a whole host of benefits for our sin.
Oil in the nuts makes up 75% of it’s weight. It’s oil is light yellow, with it being full of both omega 3 & 6 fatty acids, having a shelf life of up to 5 years.
But is it any good for your skin?
Good fats for your skin
Macadamia nuts are high in monounsaturated fats. These are single boned healthy fats that help our skin to retain water,as well as maintaining the components of both fats and ceramides that help keep skin firm and healthy.
Macadamia oil contains palmitic acid. Palmitic acid is found in human sebum, but decreases dramatically in adulthood. It has been shown to have mild antioxidant properties.
Macadamia oil also contains high levels of oleic acids, which is great for softening the skin, regenerating skin cells, moisturizing the skin, and is a natural anti-inflammatory. Linoleic acid content helps restore skin barrier function and reduces transepidermal water loss skin dehydration).
Macadamia nut oil keeps our skin hydrated
Our skin naturally retains it’s moisture through the lipid, which is a layer of oil that covers the skin to prevent moisture within our body from evaporating. As we age though, our skins natural ability to moisturise itself deteriorates.
‘The epidermis thins and turnover rate slows dramatically. Skin thins progressively over adult life at an accelerating rate. The epidermis decreases in thickness, particularly on the face, neck, upper part of the chest, and the extensor surface of the hands and forearms 
What’s great about macadamia oil is that it has a ‘high content of Palmitoleic acid in which gives it beneficial, anti-aging properties. Palmitoleic acid is naturally found in the natural oils in human skin’ 
Due to this similarity, macadamia oil can more easily penetrate our skin and help to keep our skin at optimal levels of moisture. By doing so it helps to reduce age spots and wrinkles. This is why macadamia nut oil is often used as a skin care product and anti-aging.
A 2017 study found that using macadamia oil for a period of 4 weeks ’the macadamia nuts oil nano cream formula promoted the moisture of the facial skin from the condition of the dry skin being normal skin after 4 weeks of treatment with an increase in the moisture level of 45.83%.
Helping our skin against the external environment
Not only does our skin have to deal with ageing but also the environment. As we go about our day our skin is bombarded with all manner of external elements. From office air conditioning, summer sun to ice-cold winds of winter, our skin can easily end up feeling tight and dry by the end of the day.
Macadamia oil also contains squalene. A lipid produced naturally by your own skin cells, this colourless liquid aids in both cell regeneration and protecting our skins natural barrier. It helps our skins natural healing ability by locking in moisture, as well as reducing the development of fine lines and wrinkles.
‘Macadamia oil also contains squalene which benefits cell regeneration and is useful as an antioxidant by protecting the skin from UV-induced lipid peroxidation .
Macadamia nut oil is high in Vitamin E
Macadamia nut oil is high in vitamin E. Vitamin E’s primary function is as an antioxidant, meaning it protects cells from damage from both free radicals and the immune system.
With this boost to the immune system and reduction in free radical, combined with macadamia nuts fatty omega acids help address fine lines, sagging and dark spots.
Vitamin E is high in antioxidants. it protects cells from damage from free radicals.
How to use Macadamia nut oil
It goes without saying that that if you have a nut allergy, that should absolutely not use it.
When you’re trying out a new substance for the first time and you’re unsure if you’re allergic or not, it’s best to test it first.
The best way to test if you are allergic or not by applying a very small amount, 1-3 drops of macadamia oil to your forearm. Again, if you know you’re allergic, don’t put it on your body.
Leave it covered for 8-12 hours and if you have no irritation, bumps or redness,you should be in the clear.
Macadamia oil is at it’s most beneficial when directly applied to your skin. With it’s many noted benefits for skin, it’s ideal in products such as serums, moisturisers and moisturising body washes.
Macadamia oil is packed with good fats, providing a host of benefits to our skin. Being native to Australia, you’ll find Macadamia nut oil in plenty of kin care products.
Have you used macadamia oil before? If so, in what products?