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Supplement comparison tool
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| Category | Suplementy | Suplementy |
| Evidence strength | Strong evidence | Strong evidence |
| Evidence Score | 5/5 | 4/5 |
| User rating | 4.7 (189) | 4.7 (738) |
| Typical dose | Deficiency prevention: RDA of about 14–16 mg/day; in dermatology trials on skin-cancer prevention: 500 mg twice daily (1000 mg/day) under medical supervision. Topically: cosmetics with 2–5% niacinamide, applied once or twice daily | 200–400 mg of elemental magnesium per day (RDA: approx. 310–420 mg depending on sex and age) |
| Form | Capsules/tablets taken orally; creams and serums with niacinamide applied topically to skin | Magnesium citrate, lactate or glycinate — better bioavailability than the oxide form |
| Average price | Doustnie: 15–35 zł za opakowanie starczające na miesiąc. Miejscowo: 20–80 zł za serum/krem z niacynamidem, zależnie od marki i koncentracji | 20–45 zł za opakowanie 60 kapsułek (miesiąc stosowania) |
| Monthly cost | ok. 15–80 zł/miesiąc, zależnie od formy i produktu | ok. 20–45 zł/miesiąc |
| Time to effects | Topically: sebum reduction can be measurable after just 2–4 weeks of regular use, effects on the barrier and hydration after 4–6 weeks, and visible reduction in discoloration usually after 8–12 weeks. Orally, in the context of skin-cancer prevention: effect was assessed in trials at 3, 6, 9 and 12 months of regular use. | With an actual deficiency, improvements in well-being and sleep can be noticeable after 1–3 weeks; fully replenishing tissue stores takes longer, usually several weeks. |
| Who it's for | People with combination or oily skin seeking to regulate excess sebum production | People with a diet low in leafy greens, nuts and whole grains |