Add up caffeine from gum, coffee, espresso, energy drinks and pills, check the total against the 400 mg adult limit, and get a half-life based cutoff so it clears before bed.
Caffeine Dose and Timing Calculator: Gum, Coffee, Drinks Read More »
If you take Ozempic, you have probably noticed that the standard advice — "just set a calendar reminder" — does not account for anything specific to this drug. It ignores the dose ramp, the injection-site rotation requirement, and the nausea pattern that peaks on day two of each new dose tier and then eases. The
Best Ozempic Tracker Apps for Weekly Injections Read More »
Enter pre- and post-workout weight to get your personal sweat rate and hourly sodium target.
Sweat Rate Calculator: Fluid and Sodium From a Home Weigh-In Read More »
Supplement Calculators & Tools: Dosing, Timing & Comparison Tools Free, evidence-based supplement calculators and tools — dosing, timing, unit conversions, stack builders and brand comparisons. Educational only; not medical advice. Talk to a healthcare professional before changing your regimen. Dose Calculators Apigenin Dose Calculator (Sleep, Longevity, By Goal) B12 Dose by Form Calculator (Methyl vs
Supplement Calculators & Tools: Dosing, Timing & Comparison Tools Read More »
Calculate elemental zinc by form. “50 mg zinc picolinate” delivers different elemental zinc than “50 mg zinc oxide.” Includes RDA, common cold protocols, and the copper-depletion warning most labels don’t disclose. Math, not medical advice. The 40 mg/day ceiling: chronic intake above 40 mg elemental zinc depletes copper over months. Most “high-dose immune” formulas at
Zinc Dose Calculator (Picolinate vs Citrate vs Gluconate, By Form) Read More »
Match your vitamin D dose to the right K2 (MK-4 or MK-7) amount based on bone-health trial ratios. Calculator also flags the magnesium cofactor that most stack labels ignore. Math + RCT references, not medical advice. Why stack D with K2: vitamin D raises calcium absorption from the gut; K2-dependent proteins (osteocalcin, MGP) direct that
Vitamin D + K2 Stack Calculator (Synergy Dosing) Read More »
Convert vitamins A, E, and K between metric units (mcg/mg) and International Units (IU). Each vitamin has its own conversion factor, and vitamin E differs by form. For vitamin D, see our dedicated D converter. Why IU vs mcg matters: The 2020 FDA Nutrition Facts label moved from IU to mcg/mg as primary, but older
Vitamin A, E, K Unit Converter (mcg ↔ IU) Read More »
Calculate spermidine dose by goal — autophagy / longevity, cognitive support, hair growth. Trial doses range from 1.2 mg (food intake) to 6 mg (supplement protocols). Wheat germ is the cheapest natural source; branded supplements offer convenience at premium price. Math, not medical advice. Honest caveat: spermidine human RCT evidence is preliminary. SmartAge trial (Schwarz
Spermidine Dose Calculator (Wheat Germ vs Spermidine3, By Goal) Read More »
Calculate trans-resveratrol dose. Stilbene polyphenol found in red wine, grapes, Japanese knotweed (the standard supplement source). 2010s hype was excessive — early sirtuin-activation claims were oversold; David Sinclair-era enthusiasm has moderated. Real but modest CV / metabolic effects in some populations. Math, not medical advice. Honest framing: trans-resveratrol has real biological activity but effect sizes
Resveratrol Dose Calculator (Trans-Resveratrol + NMN/NR Pairing) Read More »
Calculate quercetin dose by goal. Flavonoid found in onions, apples, capers. Three main use cases: allergies (mast cell stabilizer), senolytic protocols (with fisetin or dasatinib), cardiovascular / anti-inflammatory. Absorption is poor — form matters. Math, not medical advice. Bioavailability problem: standard quercetin (quercetin dihydrate) absorbs poorly — under 5% from a typical oral dose. Phytosome
Quercetin Dose Calculator (Allergies / Senolytic / CV) Read More »
