An advertisement from Forecast, the makers of the Foundation

The Forecast Journal · 8 minute read

It starts sooner than anyone told you.

The menopausal transition usually lasts about four to eight years, and symptoms can begin in the late thirties. The first signs rarely look hormonal, so they get called stress, and the conversation ends there.

Six early signs that get called “just stress.”

Falling estrogen and progesterone do not announce themselves. They show up as ordinary complaints, sometimes years apart, that nobody connects.

1. Waking at 3am, wide awake, for no reason.

In the long-running SWAN study, 38% of women aged 40 to 55 reported difficulty sleeping, rising to 45% in late perimenopause.


2. A cycle that got shorter, or heavier, or both.

Often the earliest measurable change, and the one most likely to be waved off.


3. Anxiety that arrived without a story.

Women with little anxiety beforehand were about 1.6 times as likely to report high anxiety once they were in perimenopause.


4. Rage at 4pm. Tears at 9.

Major depressive episodes were two to four times as likely in perimenopause and early postmenopause as before.


5. Aching joints, a stiff shoulder.

One review estimates that more than 70% of women have muscle and joint symptoms around menopause. A specific link to frozen shoulder is suspected but not yet proven.


6. Losing the word. Losing the thread.

44% of perimenopausal women reported forgetfulness, against 31% of women who were not yet in the transition.

None of these proves anything on its own. Together, in a woman between 35 and 45, they are a pattern worth raising with a clinician.

Not imagined. Measured.

Those figures are not impressions. Most of them come from SWAN, the Study of Women’s Health Across the Nation, which has followed thousands of American women through midlife since the 1990s. It is the reason we know what the transition does, rather than what people assume it does.

How long does it last? That depends on when it starts. Women whose transition began earliest took a median of 8.6 years to reach their final period. Those who started latest took 4.4. The Menopause Society notes that symptoms may begin as early as a woman’s thirties.

Short on time? Skip to what we would recommend ↓

What changes first

Most people picture menopause as estrogen switching off around fifty. The early years look different. Progesterone tends to fall first, quietly. Estrogen does not fall so much as swing, sometimes higher than before, for years.

That drawing is a simplification. Here is what was actually measured. The SWAN Daily Hormone Study followed 848 women aged 43 to 53 and tracked their hormones every day for a full cycle, once a year. Within about three years, the share of cycles that released an egg fell from 81% to 65%. A cycle without ovulation makes very little progesterone, which is why progesterone is usually the first to slide.

That is why the first signs are about sleep and mood rather than hot flashes. It is also why a blood test on any single day can come back normal.

“You are too young for that.”

Most women hear that sentence at least once before anyone says the word perimenopause. If it happens to you, ask what else would explain the pattern, and ask for it to be noted in your file. A symptom diary covering two or three cycles is more persuasive than a single appointment.

Why a blood test can miss it

Hormone tests feel like they should settle the question. In perimenopause they often cannot. Estrogen, and the hormones that drive it, rise and fall from week to week, sometimes from day to day. A sample taken on a calm day looks normal. A sample taken ten days later might not.


This is why the UK’s NICE guideline tells doctors to diagnose perimenopause in otherwise healthy women over 45 from their symptoms, without laboratory tests. It suggests considering a hormone (FSH) test only for women aged 40 to 45 with symptoms, or under 40 when menopause is suspected. Below 45 a doctor may also test to rule out things that can look similar, such as thyroid problems or low iron.


So a normal result is useful information. It is not the end of the conversation. What moves the conversation forward is a record: two or three cycles of notes on sleep, cycle length, mood and anything new.

If you would rather see now what we make for this stretch, it is here. The rest of the article will still be waiting.

See the Foundation

Easier to keep than to get back

Estrogen has been quietly looking after more than your cycle. Muscle, bone and collagen all lean on it, and all three are far easier to hold on to than to rebuild later.

Bone is the clearest example. Before the transition it barely changes. Then, about a year before the final period, loss switches on at roughly 2.5% a year at the spine, and holds that pace for about three years.

Muscle is subtler. The same study found lean mass flipping from a slight yearly gain to a slight yearly loss, while the rate of fat gain nearly doubled. Across ageing research in general, muscle mass falls by roughly 3 to 8% a decade after 30. None of it is dramatic in a single year. It compounds.

What the early years ask for is unglamorous: protect your sleep, lift something heavy twice a week, eat enough protein and fibre. Supplements are the smaller half of the answer, and anyone who tells you otherwise is selling something.


They are still a useful half. The trouble is that the menopause aisle was built for a different woman.

What to do this week, without buying anything

None of this needs a product.

Start a two-line daily note.

How you slept, and where you are in your cycle. Add anything new. In two months you will have the record most appointments are missing.


Lift something heavy twice a week.

Twenty minutes is enough. Squats, rows, presses, carries. Muscle and bone both respond to load, and nothing in a bottle replaces it.


Put protein in every meal.

Most of us eat most of our protein at dinner. Spreading it across the day gives muscle more to work with.


Guard the hours before bed.

A regular wake-up time does more than an early bedtime. Many women find that alcohol close to bedtime costs them more sleep than it used to.


Book the conversation.

Take your notes. Say the word perimenopause yourself. Ask what else could explain the pattern, and what the plan is if it continues.

When the basics are in place, this is the box we built for the rest.

See the Foundation

What we would recommend

The Foundation: four plain products for the years before.

We make Forecast, so weigh this accordingly. It is the box we built for this exact stretch: one product for each of the four things that start to shift, with the plain ingredient name on the front of every label. No hormone blend. No proprietary anything.

Night · magnesium glycinate. Three capsules before bed. Five things in the capsule, all five named on the front. Supports nervous system function.*


Frame · creatine monohydrate. Five grams in a morning coffee. One ingredient. Supports muscle strength, lean body mass and cellular energy production.*


Weave · collagen peptides. Half a scoop, dissolves clear. One ingredient. Supports skin, hair, muscle and bone health.*


Core · gut health. Two capsules with a meal. Four actives, all named. Promotes digestive health.*

How it fits into a day

A scoop of Frame and half a scoop of Weave in a morning coffee. Two Core capsules with dinner. Three Night capsules about an hour before bed. About a minute a day.

What arrives

The 90-day box comes as one delivery: three Night, three Core, three Weave and two Frame. Frame holds 50 servings, so two tubs cover the three months. The monthly box is one of each.

One box holds all four. $397 for 90 days, which is about $132 a month, or $149 month to month. US shipping is free.

See the Foundation

If your sleep has not moved by day 30, we refund your first month. Keep the products.

*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.

Skeptical? Good.

You should be. These are the questions we would ask.

Can I not just buy these four things separately?

Yes. Magnesium glycinate, creatine, collagen and a gut health capsule are all sold elsewhere, and if you already have brands you trust, keep them. Bought one by one from us they come to $171 a month. The box is $149, or about $132 a month on the 90-day plan.


I am 37 and I feel fine. Is this for me?

That is who it is for. Muscle, bone and collagen are easiest to keep and hardest to get back. The point of starting before you need it is that need arrives quietly.


Is this hormone therapy?

No. Nothing in the Foundation is a hormone or acts like one. If you want to talk about hormone therapy, that is a conversation with a clinician, and a good one to have.


Can I take it with birth control or an antidepressant?

The four Foundation products have no known interactions with hormonal contraceptives or SSRIs. As always, tell your doctor what you take.


Who should not take it?

If you are pregnant or nursing, have kidney disease, or are under a doctor’s care for any condition, ask them first. Every label says the same.


How does the guarantee work?

Take the Foundation for 30 days. If your sleep has not improved, email us and we refund your first month. Keep the products. On the 90-day box, that is the first month refunded, plus a refund for anything you return unopened.

See the Foundation

Sources

Kravitz HM et al. Sleep difficulty in women at midlife. Menopause 2003. Greendale GA, Derby CA, Maki PM. Perimenopause and cognition. Obstet Gynecol Clin North Am 2011. Bromberger JT et al. Major depression during and after the menopausal transition. Psychol Med 2011. Bromberger JT et al. Does risk for anxiety increase during the menopausal transition? Menopause 2013. Wright VJ et al. The musculoskeletal syndrome of menopause. Climacteric 2024. Paramsothy P et al. Duration of the menopausal transition. Menopause 2017. Santoro N et al. Factors related to declining luteal function in women during the menopausal transition. J Clin Endocrinol Metab 2008. NICE guideline NG23, Menopause: diagnosis and management. Fawcett Society. Menopause and the Workplace, 2022. Greendale GA et al. Bone mineral density loss in relation to the final menstrual period. J Bone Miner Res 2012. Greendale GA et al. Changes in body composition and weight during the menopause transition. JCI Insight 2019. Volpi E et al. Muscle tissue changes with aging. Curr Opin Clin Nutr Metab Care 2004. The Menopause Society, press release on perimenopause knowledge gaps, 2025.


This page is for general education and is not medical advice. Talk to a clinician about your own symptoms.