Establish a baseline before you buy a single capsule. Biological age, lipid panel, fasting insulin, hsCRP, ApoB, homocysteine, omega-3 index, vitamin D.
Apply only protocols backed by human RCTs and available with a reliable kosher certification. No pareve doubt. No animal-only data.
Close the loop in 3–6 months. Did the marker move? If not, the protocol failed for you — regardless of how famous the supplement is.
Senior OU position paper on how kosher law is applied to nutraceutical and supplement certification — covering active ingredients, solvents, excipients, and the auditing process behind any OU symbol on a supplement.
Read the OU position →OU psak on gelatin capsules — including Rabbi Hershel Schachter’s ruling that even soft gelatin capsules may be swallowed for medical purposes when no kosher alternative is available, since gelatin is not eaten k’derech achila.
Read the OU psak →Star-K’s comprehensive halacha framework for vitamins and supplements — covering choleh, mechush, shelo k’derech achila, gelatin, stearates, dilutants, and the practical preference for kosher-certified product first.
Read the Star-K guide →Star-K’s annually updated USA list of OTC medications, vitamins, and supplements whose ingredients have been reviewed and determined permissible for those who are ill or have deficiencies. Not a Passover list.
Open the Star-K medicine list →Consumer-facing cRc listings of medications and supplements reviewed for kashrus status — the third major US database we cross-check against any brand or SKU before assigning a kosher-integrity rank.
Open the cRc list →Jewish Action’s feature on the halacha of medications and vitamins, citing Rabbi Moshe Feinstein zt”l, Rabbi Yisroel Belsky, and Rabbi Hershel Schachter on tablets, gelatin capsules, sugar-coated pills, and multivitamins.
Read the Jewish Action piece →Halacha discussion only. The sources above are educational primary documents. They are not a substitute for your own rav’s psak on your specific situation, nor for your physician’s medical guidance. Always pasken with your own rav.