If you've noticed MSM appearing on ingredient lists and wondered what it actually is, you're not alone. It's one of those ingredients that sounds clinical but has a surprisingly human story behind it, and a genuinely impressive body of evidence to back it up.
MSM: the basics
MSM stands for methylsulfonylmethane. It is the most bioavailable form of sulphur available to the body, meaning it is the form your cells can most readily absorb and use. Sulphur is found naturally in foods including onions, garlic, cabbage and asparagus, but in skincare it is used in its concentrated, purified form.
Sulphur is involved in more than 140 processes in the body. It is a building block for collagen, keratin and amino acids, and plays a critical role in the production of glutathione, one of the body's most important antioxidants. When sulphur levels are adequate, the skin has what it needs to repair, rebuild and defend itself.
Why OSKIA was built on MSM
OSKIA's founding ingredient is not an accident. It begins with Georgie Cleeve's father, whose company NAF (Natural Animal Feeds) first used MSM as a joint supplement for horses more than 35 years ago. As a teenager, Georgie underwent multiple knee operations and was told she would never ski again. On her father's recommendation, she tried MSM. Her knees recovered completely.
What surprised her more was what happened to her skin. She had teenage skin prone to rosacea, eczema and acne. After taking MSM, all of it cleared. That observation — that sulphur could transform skin from the inside out — became the founding principle of OSKIA. Today, MSM sits at the heart of the brand's MSM Regen Complex and appears throughout the product range.
What MSM does in the skin
MSM works across several mechanisms simultaneously. Its anti-inflammatory properties make it particularly valuable for reactive, sensitised or condition-prone skin. Clinical research has demonstrated that MSM can significantly reduce inflammatory markers, with trials showing meaningful reductions in joint and tissue inflammation.1,2 More recent research has investigated its effect on cell signalling pathways, including STAT3, which is involved in inflammatory response at a cellular level.3
For the skin specifically, MSM supports collagen synthesis, which underpins firmness and structure. It has been shown to reduce the visible appearance of fine lines. It supports the skin barrier, which governs how well the skin retains moisture and keeps irritants out. And its anti-inflammatory action makes it effective for skin conditions including acne, rosacea and eczema, all of which have an inflammatory component.
Because MSM is sulphur-based, it also contributes to keratin production. Keratin is the structural protein that gives skin its resilience and helps it maintain a smooth, even texture.
The OSKIA products that carry it
OSKIA's MSM Regen Complex appears across a number of products designed to work at different stages of a skincare ritual. The Micro-Exfoliating Balm uses MSM alongside physical and enzymatic exfoliants to resurface and brighten without stripping. The Renaissance Cleansing Gel delivers a thorough, results-driven cleanse that also calms the skin. The Renaissance Mask is an intensive treatment that combines MSM with a range of actives to address congestion, dullness and uneven tone. And the CityLife Facial Mist brings MSM into an on-the-go format, helping to counteract environmental stressors and support the barrier throughout the day.
Who benefits most from MSM in skincare
MSM is not an ingredient with a narrow use case. Its combination of anti-inflammatory, barrier-supporting and collagen-building properties makes it broadly useful. That said, it is particularly well suited to skin that struggles with redness, sensitivity or recurring conditions such as rosacea or acne. It is also valuable for anyone focusing on visible signs of ageing, given its role in collagen synthesis and its clinically supported effect on fine lines.
Frequently asked questions
Is MSM safe to use on skin every day?
Yes. MSM is well-tolerated and suitable for daily use. It is not an active that causes purging or requires a build-up period. Because of its anti-inflammatory nature, it tends to calm skin over time rather than challenge it.
Which OSKIA products contain MSM?
MSM is present in the Micro-Exfoliating Balm, Renaissance Cleansing Gel, Renaissance Mask, CityLife Facial Mist and others, as part of OSKIA's proprietary MSM Regen Complex across the range.
Can MSM help with sensitive or rosacea-prone skin?
It can, and this is one of its most valuable applications in skincare. MSM's anti-inflammatory properties address one of the root drivers of rosacea and sensitivity. Many people with reactive skin find that consistent use of MSM-containing products reduces the frequency and intensity of flare-ups over time.
1. Kim LS, et al. "Efficacy of methylsulfonylmethane (MSM) in osteoarthritis pain of the knee." Osteoarthritis and Cartilage, 2006.
2. Usha PR, Naidu MU. "Randomised study of oral glucosamine, methylsulfonylmethane and their combination in osteoarthritis." Clin Drug Investig, 2004.
3. Joung YH, et al. "Methylsulfonylmethane inhibits STAT3 activity in prostate cancer cells." Oncol Rep, 2012.
