New studies show that rosemary hydrosol has a so-called polar volatile component (2). Meaning that hydrosol has most compounds present in the essential oil, but they are differently charged. Many are water-soluble; others are oil soluble and dispersed in the hydrosol as small molecules. This distinct polarisation and smaller molecular size mean that they have high penetrating power. In some conditions, hydrosol may even work better than essential oils.
Rosemary hydrosol, just like rosemary essential oil, is rich in terpenes such as verbenone, α-terpineol, and eucalyptol (2). Terpenes act as anti-inflammatory agents, suppress microbial growth and are also good for nerves. In addition, they are also excellent antioxidants.
Rosemary Hydrosol Skin Benefits
1. Tone the skin
Rosemary hydrosol is also an excellent astringent that can help tighten the skin and protect it from toxins. Furthermore, it can also help with blood circulation, improving the overall skin tone
2. Manage acne
Studies have tested and found it effective for pathogens (3) like salmonella and E. coli. For skin health, it may mean that it can prevent bacterial overgrowth and suppress the formation of acne.
3. Acts as a penetration enhancer
Terpenes present in rosemary hydrosol can help boost the performance of active ingredients. As an excellent penetration enhancer, terpenes in rosemary hydrosol help increase the amount of active ingredients that can reach deeper layers of the skin (4).
4. May reduce the skin damage caused by UV radiation
Long term sun exposure is one of the leading causes of photoaging. Research showed that water-soluble rosemary extract could mitigate damage caused by UV radiation by regulating MMP-1 gene transcription, making it a promising agent for mitigating skin photodamage(5).
5. Improve overall skin health
Rosemary hydrosol also exhibits anti-inflammatory and antioxidant activities that can help improve the skin’s overall health. It can fight inflammation, protect skin from oxidative stress and slow down ageing.
6. Reduce anxiety
Apart from all these benefits for the skin, rosemary hydrosols may also help relax nerves and reduce anxiety. According to the research (Kenichi et al.,2016), camphor and borneol found in the rosemary hydrosol may help stimulate the central nervous system, thus reducing anxiety.