Every Supplement We’ve Tested, Honestly Ranked
Reviews across all five sections of the site: hormone health, gut health, sleep, stress and nutrition. Every product is scored on four things and four things only — how strong the human evidence is, whether the dose matches the one that was actually studied, third-party purity testing, and what it costs you per day.
Myo-Inositol + D-Chiro 40:1
The most-studied supplement in PCOS by a wide margin. Get the 40:1 ratio the trials actually used: 4,000 mg myo with 100 mg D-chiro. Anything else is improvising.
- Evidence: Strong (RCTs)
- Cost per day: $0.72
Multi-Strain Probiotic, 20B CFU
The strains that actually turned up in the PCOS and metabolic trials, at a dose that survives the trip, in a capsule that does not need refrigerating.
- Evidence: Moderate
- Cost per day: $0.48
Magnesium Glycinate, 400 mg
The kindest form to your digestion and the one used in most sleep research. Take it with dinner rather than on an empty stomach.
- Evidence: Moderate
- Cost per day: $0.22
Ashwagandha (KSM-66), 600 mg
The exact extract used in most human trials showing reduced perceived stress and cortisol. Not one to combine with thyroid medication unsupervised.
- Evidence: Moderate
- Cost per day: $0.38
Creatine Monohydrate, 5 g
Possibly the most-researched supplement on earth, and wildly under-used by women. Supports strength, glucose disposal and cognition. No loading phase, no bulking, no drama.
- Evidence: Very strong
- Cost per day: $0.10
The Full Comparison
Sorted by score, and evidence strength always beats a low price.
Prices are indicative averages and change often — always check current pricing at the retailer. Noura Theory earns affiliate commissions on some links at no extra cost to you. Nothing on this page is medical advice; supplements interact with medications and conditions, so please speak to a clinician before starting anything new.
No Brand Has Ever Paid to Be Here
Rankings get finalised before a single affiliate programme is applied. If something we rate highly pays us nothing, it still rates highly. If a generously-paying product misses the dose or purity bar, it does not make the page at all — and anything we cannot recommend stays right here with a low score instead of quietly vanishing.