She Took Creatine for 100 Days at 40 – Here’s Exactly What Changed for Her Body and Brain
A 40-year-old woman recently took creatine every day for 100 days and shared how it changed her strength, energy, and even her workday focus—challenging the idea that creatine is only for young guys flexing in the free-weights area.
Her story, covered by LADbible, resonated with a lot of women who feel curious—but also a bit nervous—about supplements. If you’ve ever wondered whether creatine is safe, whether it’ll make you “bulky,” or whether it’s even worth it in your 30s or 40s, you’re in the right place.
In this guide, we’ll unpack what happened during her 100‑day experiment, what current research says about creatine for women around 40, and how to decide if it fits your own health and fitness goals—without hype or fear-mongering.
Why a 40-Year-Old Woman Decided to Try Creatine for 100 Days
According to the LADbible feature, this woman didn’t start creatine to become a competitive athlete. She was:
- Juggling work and life, often feeling drained by mid-afternoon
- Frustrated that her strength progress in the gym had plateaued
- Curious whether creatine could support her brain as much as her muscles
- Worried about common myths: weight gain, water retention, and “masculinizing” effects
Her goal wasn’t a dramatic “before and after” body transformation. It was simpler and more relatable: feel stronger, more capable, and more mentally sharp—without wrecking her hormones or her confidence.
What She Actually Noticed After 100 Days on Creatine
In her 100‑day update, she described several changes that lined up closely with what studies on creatine often report:
- More strength in the gym
She noticed she could:- Lift heavier weights (especially in compound lifts like squats and presses)
- Perform more reps at the same weight
- Recover faster between sets
- Better training consistency
She described fewer “off days” where everything felt like a slog. While creatine isn’t a stimulant, supporting energy production in muscle cells may have helped her maintain performance. - Subtle cognitive benefits
She reported:- Improved concentration during focused work
- Less “brain fog” on busy days
- Minimal changes in scale weight
She did notice a small increase on the scale early on—likely from water stored inside muscles, not fat gain. Over time, her clothes fit the same or slightly better as she built muscle.
“I was scared I’d blow up or look puffy. Instead, I just felt…stronger. My jeans fit the same, but I could lift more weight and still feel fresh enough to focus at my desk later.”
– 40-year-old creatine user, as reported by LADbible
What Does Science Say About Creatine for Women Around 40?
Creatine monohydrate is one of the most extensively studied supplements. Most research has historically focused on young male athletes, but growing data now includes women and older adults.
- Muscle strength & performance – Meta-analyses show creatine improves high‑intensity performance and strength in both men and women when combined with resistance training.
- Muscle mass & aging – Studies in adults over 40 suggest creatine, paired with strength training, can help preserve lean mass and strength, which are crucial for healthy aging and independence.
- Brain health & cognition – Emerging research suggests creatine may support cognitive performance under stress, sleep deprivation, or intense mental effort. Some work specifically in women shows potential benefits in memory and mental fatigue, though results are mixed and still evolving.
- Safety – In healthy individuals, long‑term use of creatine monohydrate at typical doses (3–5 g/day) appears safe, with no strong evidence of kidney damage when kidney function is normal. People with pre‑existing kidney issues should avoid it unless cleared by their doctor.
For up‑to‑date evidence, see:
How to Use Creatine Safely: A Practical 100-Day Plan
If you’re considering trying creatine, you don’t have to copy bodybuilder protocols. Many women prefer a simple, low‑stress approach.
1. Choose the right form
- Best choice: Creatine monohydrate (most studied, widely available, usually cheapest)
- Look for third‑party tested brands (e.g., NSF Certified for Sport, Informed‑Sport) when possible
- Powder is easiest to dose; capsules work if you dislike mixing drinks
2. Decide on your dosing strategy
You can either “load” creatine or start with a steady daily dose.
- No‑load option (simpler and gentler):
- Take 3–5 g once daily
- Expect full saturation in about 3–4 weeks
- Loading option (faster saturation):
- Approx. 20 g/day split into 4 doses for 5–7 days, then 3–5 g/day
- Note: This can slightly increase the chance of mild stomach upset in some people.
3. When to take creatine
Timing isn’t critical, but to build a habit:
- Take it with a meal or post‑workout shake to reduce the chance of stomach discomfort
- Pair it with an existing routine (e.g., morning coffee, breakfast, or after your workout)
4. Hydration and lifestyle
- Drink enough water throughout the day (your thirst is a decent guide for most healthy adults)
- Combine creatine with strength training 2–4 times per week for best results
- Prioritize adequate protein intake and sleep—supplements can’t fix poor basics
Common Concerns and Obstacles (Especially for Women)
Creatine carries a lot of myths, especially for women in their 30s and 40s. Let’s address the big ones honestly.
“Will I gain weight or look puffy?”
Creatine pulls water into muscle cells, which can cause:
- A small increase on the scale (often 0.5–1.5 kg early on)
- More “full” muscles, not the bloated look most people fear
For many women, this isn’t visually noticeable in clothes and can even enhance a toned appearance as strength improves. If small scale changes feel triggering, consider relying on strength records, progress photos, or how clothes fit instead.
“Is creatine safe for my kidneys?”
In healthy adults, research has not shown that normal creatine use (3–5 g/day) damages kidney function. However:
- If you have kidney disease or reduced kidney function, consult your doctor first.
- Creatine may increase serum creatinine, but this doesn’t automatically mean kidney damage—it’s a by‑product of creatine metabolism.
“Will it mess up my hormones?”
Current evidence does not show that creatine monohydrate disrupts female hormones or causes masculinizing effects. Some preliminary research even explores creatine’s potential benefits across the menstrual cycle and perimenopause, though this area is still growing and not conclusive.
Before and After: What Really Changes in 100 Days?
Changes from creatine are often more about performance and consistency than a dramatic visual transformation—especially if your training and diet stay roughly the same.
Typical “Before” (Day 0)
- Strength plateaued on key lifts
- Energy dips during or after workouts
- Moderate muscle definition, but slow visible changes
- Occasional brain fog on busy or under‑slept days
Possible “After” (Around Day 100)
- Noticeable strength increases (heavier weights or more reps)
- Improved performance on short, intense efforts (sprinting, heavy lifts)
- Slightly fuller muscles with similar or improved clothing fit
- Subjective improvements in focus or mental stamina for some people
Everyone responds a little differently. Some people are “high responders,” experiencing big performance boosts; others see modest changes. Genetics, diet, training quality, sleep, and stress all play a role.
A Simple 4-Step Action Plan If You’re Considering Creatine
If you’re inspired by this 40‑year‑old’s 100‑day journey and want to experiment in a safe, structured way, here’s a practical roadmap.
- Check your health context
- Review your medical history for kidney disease or other major conditions.
- Ask your doctor if you’re unsure, especially if pregnant, breastfeeding, or on medication.
- Dial in your training first
- Aim for 2–4 strength sessions per week, focusing on full‑body compound movements.
- Progressively increase weight or reps over time.
- Choose your creatine and start low
- Pick a reputable creatine monohydrate.
- Start with 3–5 g once per day with food.
- Note how you feel over the first 2–4 weeks.
- Track the right metrics for 60–100 days
- Log your workouts (weights, reps, how hard they feel).
- Jot down weekly notes on energy, recovery, and focus.
- Optionally, take front/side photos every 4 weeks under similar conditions.
Who Might Want to Avoid or Pause Creatine
While creatine is safe for many healthy adults, some groups should be more cautious.
- People with diagnosed kidney disease or significantly reduced kidney function
- Anyone with a history of severe reactions to supplements
- Those advised by their doctor to limit certain types of supplements
- Pregnant or breastfeeding women, unless given specific medical clearance (research here is limited)
If you’re in any of these categories, it’s worth having a clear, open conversation with your healthcare provider rather than experimenting on your own.
What Experts and Coaches Are Seeing in Real Life
Many strength coaches and sports dietitians now recommend creatine not just to young athletes, but also to women in midlife who want to stay strong and active.
“Among healthy adults, especially women over 35 who are lifting weights, creatine is one of the very few supplements I consistently see make a noticeable difference in strength and training quality.”
– Hypothetical summary of common sports dietitian perspectives, based on current literature
That said, most experts stress that creatine is a supporting player, not the star of the show. Your program, nutrition, sleep, and stress management still do most of the heavy lifting.
Bringing It All Together: Is Creatine Worth It for You?
The 40-year-old woman featured by LADbible didn’t turn into a fitness influencer or a bodybuilder in 100 days. What she gained was quieter but arguably more meaningful: better strength, more reliable energy in the gym, and a sense of empowerment at work and in daily life.
Creatine isn’t a magic powder. It won’t replace movement, nourishing food, or rest. But for many women in their 30s and 40s who are already training—or want an extra edge as they get stronger—it can be a well‑researched, relatively low‑risk tool.
If you’re curious, consider:
- Checking in with a healthcare professional if you have any medical conditions
- Setting up a consistent strength routine first
- Trying 3–5 g/day for 60–100 days and tracking how you feel and perform
Your next step: decide what you want most—more strength, better training consistency, or cognitive support—and design a small, realistic experiment around that. Let your own data, not social media, tell you whether creatine earns a permanent place in your routine.
