The only 6 vitamins women over 40 actually need.

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Walk down the supplement aisle at any Target or Costco and you'll feel completely overwhelmed. Thirty-seven kinds of multivitamins. "Women's energy blends" with 40 ingredients. Collagen powders in 12 flavors. Adaptogens you can't pronounce. Here's the truth most supplement brands won't tell you: most women over 40 only need 5 or 6 things.

And those 5 or 6 things, done consistently with quality products, will do more for your energy, sleep, skin, and hormones than a cabinet full of random bottles ever will. Here's what's actually worth your money — and what you can skip.

Why women over 40 need supplements differently

Three things change after 40 that make targeted supplementation worth it:

1. Nutrient absorption declines. Your gut doesn't absorb vitamins and minerals as efficiently as it used to.
2. Hormonal shifts create new needs. Lower estrogen affects calcium absorption, bone density, skin hydration, and mood.
3. Modern food has fewer nutrients. Even a great diet often falls short on magnesium, omega-3s, and vitamin D.

Supplements aren't a replacement for real food. They're insurance.

The 6 supplements actually worth taking

1. Magnesium Glycinate

If you only take one thing, take magnesium. Most women are deficient, and it affects everything — sleep, mood, muscle tension, stress, constipation, headaches, and period symptoms.

Look for: Magnesium glycinate specifically. Not citrate (too laxative for daily use), not oxide (poorly absorbed).
Dose: 200–400mg, taken at night for sleep support.
Try: My magnesium glycinate pick

2. Vitamin D3 + K2

Roughly 40% of adults are deficient in Vitamin D, and after 40, that deficiency contributes to mood issues, bone loss, low immunity, and fatigue. Vitamin K2 ensures the calcium your body absorbs actually goes to your bones and not your arteries.

Look for: D3 (not D2), paired with K2 (MK-7 form).
Dose: 2,000–5,000 IU D3 daily.
Try: My D3 + K2 pick

3. Omega-3 (Fish Oil or Algae Oil)

Omega-3s fight inflammation, support brain health, improve mood, and contribute to that glowing-skin look you want. Most women don't get nearly enough.

Look for: Triglyceride form (better absorbed), with at least 1,000mg combined EPA and DHA per daily dose. Third-party tested for mercury.
Dose: 1–2g EPA+DHA daily.
Try: My omega-3 pick

4. Collagen Peptides

Your natural collagen production drops about 1% per year after 30. Hydrolyzed collagen peptides are absorbed well and have real research behind them for skin elasticity, joint comfort, and hair/nail strength.

Look for: Grass-fed, Types I and III collagen. Unflavored is the most versatile.
Dose: 10–20g daily in coffee, smoothie, or hot tea.
Try: My collagen pick

5. B-Complex

The B vitamins (B6, B12, folate especially) are essential for energy production, hormone metabolism, and mood. Many women in perimenopause have increased need for B6 and B12.

Look for: Methylated forms (methylcobalamin for B12, methylfolate for folate) — especially if you have the MTHFR gene variation.
Dose: One high-quality complex daily, ideally with breakfast.
Try: The B12 I take

6. Probiotic

Your gut microbiome affects your mood, skin, immunity, weight, and hormone metabolism. A quality probiotic matters — but most drugstore probiotics don't survive the trip to your gut.

Look for: Multi-strain (at least 5–10 strains), 10–50 billion CFU, delayed-release capsule or refrigerated.
Dose: One capsule daily, usually with breakfast.
Try: My probiotic pick

Supplements most women over 40 can skip

Save your money:

• Mega-dose biotin — can cause hormonal acne and rarely helps hair unless you're truly deficient
• Generic multivitamins — doses are often too low to matter, and ingredients are usually poor quality
• "Fat burner" blends — poorly regulated, often stimulant-heavy, and don't address the actual hormonal issue
• Most "detox" supplements — your liver is already a detox organ; you don't need to buy it extra help
• Calcium (from a supplement) — food sources are better, and excess supplemental calcium has been linked to heart issues

You don't need 17 supplements. You need the right few, consistently, for long enough to work.

Quality actually matters with supplements

Cheap supplements often don't absorb well, use poor forms of nutrients, or contain fillers you don't want. Look for third-party tested (NSF, USP, Informed Sport certifications), no artificial colors or fillers, and transparent sourcing.

When to take what

Simple timing template:

• Morning (with breakfast): B-complex, D3+K2, omega-3, probiotic, collagen
• Night (before bed): Magnesium glycinate

Get the full midlife supplement + skincare plan

The Midlife Glow Up Guide goes deeper into supplements, gives you a shopping checklist, and pairs it with skincare and self-care habits that all work together. Because supplements alone aren't the answer — but supplements plus the right daily practices? That's where real change happens. Shop the Glow Up Guide →