Not every change your body goes through in your 40s is menopause. There is a transitional phase that comes first, and it can last for years. It is called perimenopause, and it is worth understanding on its own terms, because what you experience during this phase, and what actually helps, is distinct from what comes after.
Here is what perimenopause is, what to expect, and how to support your body through the transition.
What is perimenopause?
Perimenopause is the transitional period before menopause, when your body begins preparing to stop having periods. During this time, levels of estrogen—the main female sex hormone—start to decrease and fluctuate rather than following the steady rhythm of your reproductive years. You may begin experiencing symptoms that feel a lot like menopause, even though you are still having periods[1].
It is not the same as menopause. Menopause is defined as the point after you have gone 12 consecutive months without a period. Until that mark is reached, you are technically still in perimenopause, regardless of how irregular your cycles have become or how many symptoms you are experiencing[2].
That distinction matters because it shapes how you interpret your symptoms and what kind of support makes sense for where you are.
When does it start, and how long does it last?
There is no single timeline. Most women begin noticing signs of perimenopause sometime in their 40s, but some experience changes as early as their mid-30s, and others do not notice shifts until their late 40s or early 50s[2].
The duration varies just as much. Perimenopause can last for years, and the experience looks different from person to person[1].
Two signals that give a sense of where you might be in the transition: if the length of your menstrual cycle is consistently different by seven days or more, that may indicate early perimenopause. If you go 60 or more days between periods, you are likely in late perimenopause[2].
Common Perimenopause Symptoms
Perimenopause affects the body in ways that go well beyond irregular periods. Fluctuating estrogen levels drive a wide range of symptoms that can appear together, cycle in and out, or shift in intensity over time. Common symptoms include[2]:
Irregular periods. Your cycle may become longer, shorter, heavier, lighter, or unpredictable. Skipping periods entirely becomes more common as perimenopause progresses.
Hot flashes. These sudden waves of heat can vary in intensity and duration and are among the most recognizable symptoms of this transition.
Sleep disruption. Trouble falling asleep, nighttime waking, and reduced sleep quality are frequent during perimenopause, often tied directly to hormonal changes.
Mood changes. Irritability, mood swings, anxiety, and an increased risk of depression can all occur during perimenopause, particularly in women who have experienced hormonal mood changes earlier in life.
Vaginal and bladder changes. As estrogen decreases, vaginal tissues may become drier and less elastic. Some women also experience more frequent urinary urgency or infections.
Changes in sexual function. Sexual arousal and desire may shift, which can affect intimacy and relationships.
Brain fog. Difficulty concentrating and memory lapses are reported by many women during this phase[3].
Bone density changes. Estrogen helps protect bone mass. As levels fall, bone loss can accelerate, which is worth discussing with a healthcare provider.
Why Sleep Gets so Hard
Sleep disruption during perimenopause is common, and it tends to make everything else harder. Hormonal changes can lead to more nighttime awakenings and more time spent lying awake, according to the Sleep Foundation. Hot flashes and night sweats are among the most direct contributors, interrupting sleep at their worst moments. Anxiety and mood changes can make it harder to settle back down after waking, which compounds the problem over time.
Insomnia is one of the most frequently reported concerns during perimenopause. The risk of other sleep disorders, including obstructive sleep apnea and restless legs syndrome, may also increase during this phase[3].
If sleep disruption is a significant part of your perimenopause experience, you are not alone, and it is worth treating as its own priority rather than a side effect to push through.
Mood and Metabolism During the Transition
Estrogen influences serotonin and other neurotransmitters that help regulate emotional steadiness[4]. As estrogen levels fluctuate and gradually decline, many women notice mood swings, irritability, or a heightened sensitivity to stress that can feel out of proportion to what is actually happening around them[1]. Women with a history of PMS, postpartum depression, or mood disorders may be more likely to experience mood changes during this transition[2].
Metabolism is another area that often shifts. Some women notice differences in how their body manages energy and blood sugar during perimenopause, even without major changes to diet or activity. Certain trace minerals play a supporting role in normal metabolic function. Chromium is a clinically studied mineral that supports a healthy metabolism and lean body mass with a healthy lifestyle and exercise.*
Where Supplements Fit In
Many women consider supplements as part of a broader approach to managing their perimenopause experience alongside attention to sleep, stress, movement, and nutrition. The evidence base for individual supplements varies, and some supplements may have side effects or interactions with medications[5]. Talking to a healthcare provider before starting any supplement regimen is a good first step.
With that context in mind, targeted supplements designed for this specific phase of life can be a practical way to support the areas where perimenopause tends to have the most impact: hormonal balance, mood, and metabolism.
OLLY Balanced Perimeno
OLLY Balanced Perimeno is formulated specifically for the perimenopause transition. It is made with Clinically Studied Fenugreek and Chromium to support hormonal balance, mood, and metabolism during perimenopause*[6].
Fenugreek Extract is a clinically studied plant extract that supports a healthy balance of estrogen levels and mood, helping to manage perimenopausal symptoms including hot flashes and night sweats.* Chromium is a clinically studied mineral that supports a healthy metabolism and lean body mass with a healthy lifestyle and exercise.*
OLLY Balanced Perimeno is $23.99, with a subscribe-and-save option at $20.39 per month, and is designed to fit into a simple daily routine.
WARNING: Do not use if pregnant or breastfeeding. Consult a doctor or healthcare professional before use if you have or have had a medical condition, or are taking prescription medications, including estrogen or hormone-related medication.
When to Talk to Your Healthcare Provider
Supplements support your body through the transition. They are not a substitute for medical care. If you are experiencing severe mood changes, heavy or unpredictable bleeding, significant sleep disruption, or any symptoms that concern you, it is worth a conversation with your healthcare provider. They can help you understand where you are in the transition, rule out other causes, and walk through all the options available to you.
Perimenopause is a real and significant phase of life. It deserves to be taken seriously, talked about openly, and supported thoughtfully. Understanding what is happening in your body is a solid place to start.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
Sources
- Cleveland Clinic — Perimenopause https://my.clevelandclinic.org/health/diseases/21608-perimenopause
- Mayo Clinic — Perimenopause: Symptoms & Causes https://www.mayoclinic.org/diseases-conditions/perimenopause/symptoms-causes/syc-20354666
- Sleep Foundation — Perimenopause and Sleep https://www.sleepfoundation.org/women-sleep/perimenopause-and-sleep
- Johns Hopkins Medicine — Perimenopause and Anxiety https://www.hopkinsmedicine.org/health/wellness-and-prevention/perimenopause-and-anxiety
- National Center for Complementary and Integrative Health — Menopausal Symptoms: In Depth https://www.nccih.nih.gov/health/menopausal-symptoms-in-depth
- OLLY — Balanced Perimeno https://olly.com/products/balanced-perimeno