Best Perimenopause Supplements UK: What the Evidence Says
Scarlett Gray
BNutrDiet (Hons), APD, SDA
Accredited Practising Dietitian with Dietitians Australia (APD200526). Accredited Sports Dietitian and Credentialled Eating Disorder Clinician. First Class Honours in Nutrition and Dietetics from the University of Newcastle.
Best Perimenopause Supplements UK: What Actually Works
Perimenopause can begin as early as your mid-thirties — often a decade before your final period — and the hormonal shifts that come with it affect everything from skin quality and sleep to bone density and mood. If you have been searching for the best perimenopause supplements in the UK, you are not alone: interest in evidence-backed, non-hormonal support has grown significantly in recent years. Our complete guide to menopause supplements covers the full landscape, but this article focuses specifically on the perimenopause window — when oestrogen levels begin to fluctuate rather than simply decline.
The Key Nutrients: What the Research Actually Shows
Collagen is one of the most studied nutrients for perimenopausal women. Oestrogen plays a direct role in stimulating collagen synthesis — research on menopause and skin ageing reports a substantial fall in skin collagen in the early post-menopausal years, with figures around 30% commonly reported, and the decline starts during perimenopause. Marine collagen peptides at a dose of 10,000mg daily have been shown in clinical trials to improve skin elasticity, hydration and firmness within 8 to 12 weeks. Emerging research also looks at collagen's role in supporting bone mineral density, which is a growing concern as oestrogen falls — though this research is at an earlier stage than the skin evidence.
For a detailed breakdown of how marine collagen works in the body, the women's wellness guide for over 40s is worth reading in full.
Magnesium is another nutrient that merits attention. A recent review notes that "magnesium plays a crucial role in over 300 enzymatic reactions related to energy production, muscle contraction, and nerve function". While severe magnesium deficiency is rare in the UK, many adults still do not meet the recommended daily intake, with shortfalls most common in younger adults. Magnesium glycinate or bisglycinate forms are generally better tolerated than magnesium oxide.
Perimenopause Symptoms and the Supplements with the Strongest Evidence
| Symptom | Supplement | Evidence Level |
|---|---|---|
| Skin ageing / loss of elasticity | Marine collagen peptides (10,000mg/day) | Strong — multiple RCTs |
| Poor sleep / night waking | Magnesium glycinate, L-theanine | Moderate — several controlled trials |
| Hot flushes / vasomotor symptoms | Phytoestrogens (isoflavones), sage extract | Moderate — results vary by individual |
| Mood & anxiety | Ashwagandha (KSM-66), B-vitamins | Moderate — growing body of evidence |
| Joint stiffness / discomfort | Collagen peptides, omega-3s, glucosamine | Moderate — supported by trial data |
| Brain fog / cognition | Omega-3 DHA, B12 | Moderate — observational and trial data |
How Hydrolysed Marine Collagen Actually Works
Understanding how marine collagen supports the body helps set realistic expectations. Enzymatic hydrolysis breaks collagen into smaller peptides that are more readily absorbed. This allows the peptides to cross the intestinal wall and enter the bloodstream, where they can reach target tissues and support collagen synthesis in skin, cartilage and connective tissue.
Once hydrolysed marine collagen peptides enter the bloodstream, research suggests they may act as bioactive signals that support collagen synthesis — rather than simply providing amino acid building blocks. For more on this mechanism, see our guide to marine collagen peptides vs hydrolysed collagen.
Liquid vs powder: what actually differs
Both liquid and powder deliver the same clinical dose of hydrolysed collagen peptides. The genuine difference is convenience and how each fits into your daily routine. Liquid sachets require no preparation — just drink directly or mix with a splash of water. This makes liquid ideal for people on the go, travel, keeping at work, or following a specific routine where timing matters. Our liquid vs powder comparison covers this in more detail.
Kollo Premium Liquid Marine Collagen provides 10,000mg of Naticol® marine collagen per daily sachet, alongside vitamin C (which contributes to normal collagen formation for the normal function of skin), B-vitamins and l-lysine.
Kollo Balance+ for the Perimenopause Window
For women navigating the specific hormonal shifts of perimenopause and menopause, Kollo Balance+ is our dedicated menopause-focused formula. It's designed to complement — not replace — HRT and other clinical care your GP or menopause specialist may recommend.
Featured Product
Premium Liquid Marine Collagen
10,000mg of clinically studied Naticol® marine collagen daily, alongside vitamin C, B-vitamins and l-lysine.
Shop Now →What to Look for When Buying Perimenopause Supplements in the UK
Not all supplements are created equal. In the UK, food supplements are not required to demonstrate efficacy before going to market, which means quality varies enormously. Knowing what to check before you buy will save you money and, more importantly, help you actually get the dose that clinical research used.
- Look for named, clinically studied ingredients — for collagen, this means branded peptides such as Naticol® or Peptan®, with trial data attached to them specifically rather than generic "hydrolysed collagen"
- Check that the dose matches what was used in clinical trials. A collagen supplement providing 2,500mg is not equivalent to one providing 10,000mg, even if the ingredient name is identical
- Prioritise bioavailable forms of micronutrients — for magnesium, glycinate or bisglycinate is generally better tolerated than magnesium oxide
- Be sceptical of blends containing many ingredients at sub-therapeutic doses — sometimes called "fairy dusting" — where no single ingredient reaches the level needed to have any measurable effect
- Look for products manufactured to GMP (Good Manufacturing Practice) standards and independently third-party tested for purity and label accuracy
How Long Before You Notice a Difference?
Managing expectations is important. Perimenopause supplements are not fast-acting pharmaceuticals. Marine collagen studies typically show measurable improvements in skin hydration and elasticity at 4 to 8 weeks, with more pronounced effects at 12 weeks of consistent daily use. Magnesium's effects on sleep quality may be noticed within 2 to 4 weeks by some women, particularly those with lower baseline intakes.
It is also worth understanding what supplements can and cannot do. They work best as part of a broader approach that includes resistance exercise (essential for bone density), adequate protein intake of 1.2 to 1.6g per kg of bodyweight per day, good sleep hygiene and stress management. For women navigating the full range of midlife health considerations, our complete guide to menopause supplements covers hormonal and non-hormonal strategies in detail.
A note on phytoestrogens and hot flushes
Phytoestrogens (plant-derived compounds such as soy isoflavones and red clover extract) are a separate category of supplement — they are not contained in Kollo Premium Liquid Marine Collagen or Kollo Balance+. Some women exploring non-hormonal support for hot flushes look at phytoestrogen products. If this is something you're considering, the evidence base is mixed: some studies suggest phytoestrogens may reduce hot flushes over 8 to 12 weeks, but response varies significantly and they aren't suitable for everyone (including women with a history of hormone-sensitive cancers). Speak to your GP or a menopause specialist before starting phytoestrogens.
Building a Supplement Stack That Actually Makes Sense
Rather than buying every supplement associated with perimenopause, a more practical approach is to prioritise two or three products addressing your most prominent symptoms, use them consistently for at least 8 to 12 weeks, then reassess.
Marine collagen peptides are a strong foundation because they address multiple concerns — skin, joints, and (as emerging research suggests) bone — simultaneously. Beyond that, consider:
- Magnesium glycinate — may help some women with sleep, particularly those with low magnesium intake or diagnosed deficiency
- Vitamin D3 and calcium — important for bone health at this life stage, particularly in the UK where sun exposure is limited from October to March (NHS advises considering vitamin D 10µg daily)
- Omega-3s (EPA and DHA) — moderate evidence for cognitive and cardiovascular support
- Ashwagandha — some evidence for stress and cortisol modulation, though evidence specifically for perimenopausal symptom management is limited
Explore Kollo's Complete Guides
For more depth on any area of your routine: complete guide to liquid marine collagen, complete guide to collagen powder, complete guide to menopause supplements, complete guide to creatine, and complete guide to electrolytes.
Kollo Health was co-founded by Jenni Falconer - TV presenter, Smooth Radio breakfast host, ten-time London Marathon runner and host of the RunPod podcast. Read her story and why she created Kollo.
