Here's a more useful framework: Start with the fundamentals: Myo-inositol particularly if you have insulin resistance, irregular cycles, or fertility goals Vitamin D almost certainly needed, especially in the UK Magnesium especially if sleep, anxiety, or PMS are significant symptoms Add targeted support based on your symptom picture: High androgens (acne, hirsutism, hair loss): Add zinc Antioxidant support / fertility optimisation: Consider NAC What to look for on labels: Myo-inositol (possibly at 40:1 ratio with D-chiro-inositol depending on your life stage) Magnesium glycinate or bisglycinate not oxide Zinc gluconate or picolinate not oxide Vitamin D3 not D2 Doses that match studied amounts not token inclusions If a supplement lists a studied ingredient at a fraction of the dose used in trials, it's decoration, not intervention

Ardeleanu R, Dascalu AI, Neamtu A, Peptanariu D, Uritu CM, Maier SS, Nicolescu A, Simionescu BC, Barboiu M, Pinteala M (2018) Multivalent polyrotaxane vectors as adaptive cargo complexes for gene therapy
10.11594/jtls.06.01.04 88 ZanfirescuA.UngurianuA.TsatsakisA
In addition, we selected a ligand-binding configuration that adopted a catalytically active pose, which placed the proton-donating C3 position of NADP near the nitrogen-adjacent tertiary carbon of R -THIQ
Even if it were legal, keep in mind that no supplement is FDA-approved, and the supplement runs the risk of being contaminated