Comparison
Compare all 37 products
The whole catalogue in one table. The default order is the GUIVONIZ index — never price. You can sort by budget if that is your criterion, but it will never be ours.
37 products shown
| Product | Evidence | Index | Budget | What for |
|---|---|---|---|---|
| Folic acid 400 µg (vitamin B9) 400 to 800 µg a day | Strong evidence | 97 | €10–15 | Longevity, Lasting energy |
| Creatine monohydrate 5 g (Creapure) 5 g a day | Strong evidence | 96 | €25–30 | Strength & muscle, Recovery, Concentration |
| Blond psyllium husk 500 g 5 g · 1 to 2 times a day | Strong evidence | 93 | €15–20 | Digestion & microbiome, Heart & metabolism, Longevity |
| Vitamin B12 1,000 µg 1 tablet · 1,000 µg | Strong evidence | 92 | €10–15 | Lasting energy, Concentration, Longevity |
| Mineral face sunscreen SPF 50+ (zinc oxide) Two finger-lengths for face and neck | Strong evidence | 91 | €15–20 | Skin & hair, Longevity |
| Potassium-enriched salt substitute (75 % NaCl / 25 % KCl) Replaces your usual table salt | Strong evidence | 90 | under €10 | Heart & metabolism, Longevity |
| Vitamin D3 2,000 IU + K2 MK-7 1 drop · 2,000 IU | Strong evidence | 88 | €15–20 | Immunity, Lasting energy, Longevity |
| Whey isolate 90 % — 1 kg 1 scoop · 25 g protein | Strong evidence | 88 | €30–35 | Strength & muscle, Recovery, Longevity |
| Oat beta-glucan 3 g 3 g of beta-glucan a day | Strong evidence | 88 | €15–20 | Heart & metabolism, Digestion & microbiome, Longevity |
| Iodine 150 µg (potassium iodide) 150 µg a day | Strong evidence | 88 | €10–15 | Lasting energy, Longevity |
| Plant phytosterols 2 g (sterols / stanols) 1.5 to 3 g a day, with meals | Strong evidence | 87 | €20–25 | Heart & metabolism, Longevity |
| Fermented foods (kefir, raw sauerkraut, kimchi) 2 portions a day, building up gradually | Emerging evidence | 86 | under €10 | Digestion & microbiome, Immunity, Stress & anxiety |
| Plant protein, pea + rice — 1 kg 1 scoop · 24 g protein | Strong evidence | 84 | €30–35 | Strength & muscle, Recovery, Longevity |
| Enteric-coated peppermint oil 450 to 750 mg a day, in 2 to 3 doses before meals | Strong evidence | 84 | €20–25 | Digestion & microbiome |
| Omega-3 EPA/DHA 1,000 mg 2 capsules · 1,000 mg EPA+DHA | Emerging evidence | 83 | €25–30 | Heart & metabolism, Stress & anxiety, Longevity |
| Beta-alanine 3.2 g 3.2 g a day, split | Strong evidence | 82 | €20–25 | Strength & muscle, Recovery, Heart & metabolism |
| Standardised oral lavender oil 80 mg 80 mg a day, in one dose | Emerging evidence | 82 | €25–30 | Stress & anxiety, Deep sleep |
| Caffeine 100 mg + L-theanine 200 mg 1 capsule · 100/200 mg | Strong evidence | 81 | €20–25 | Concentration, Lasting energy, Strength & muscle |
| Lactase 9,000 units (enzyme) 9,000 units, 15 min before the dairy meal | Emerging evidence | 81 | €10–15 | Digestion & microbiome |
| Melatonin 1 mg 1 tablet · 1 mg | Strong evidence | 80 | €10–15 | Deep sleep, Stress & anxiety, Lasting energy |
| Iron bisglycinate 14 mg + vitamin C 1 capsule · 14 mg | Strong evidence | 80 | €15–20 | Lasting energy, Concentration, Recovery |
| Algae omega-3 EPA/DHA 500 mg 2 capsules · 500 mg EPA+DHA | Emerging evidence | 80 | €30–35 | Heart & metabolism, Longevity, Stress & anxiety |
| Glycine powder 3 g 1 level spoon · 3 g | Emerging evidence | 78 | €15–20 | Deep sleep, Stress & anxiety, Recovery |
| L-theanine 200 mg 1 capsule · 200 mg | Emerging evidence | 78 | €15–20 | Stress & anxiety, Deep sleep, Concentration |
| Retinol 0.3 to 0.5 % — night treatment A pea-sized amount, at night, 2 to 3 times a week at first | Emerging evidence | 78 | €25–30 | Skin & hair |
| Zinc bisglycinate 15 mg 1 capsule · 15 mg | Emerging evidence | 76 | €10–15 | Immunity, Skin & hair, Lasting energy |
| Magnesium bisglycinate 300 mg 2 capsules · 300 mg elemental | Emerging evidence | 75 | €20–25 | Deep sleep, Stress & anxiety, Recovery |
| Citrulline malate 2:1 — 8 g 6 to 8 g, 40 to 60 min before the session | Emerging evidence | 74 | €20–25 | Strength & muscle, Recovery |
| Calcium 500 mg + vitamin D3 1 to 2 tablets · 500 mg | Emerging evidence | 71 | €15–20 | Longevity, Strength & muscle, Joints |
| Concentrated beetroot (nitrates) 1 dose · ~400 mg of nitrates | Emerging evidence | 70 | €20–25 | Heart & metabolism, Recovery, Lasting energy |
| Chicory inulin (prebiotic fibre) 3 to 8 g a day | Emerging evidence | 68 | €15–20 | Digestion & microbiome, Immunity, Heart & metabolism |
| Vitamin C 500 mg 1 tablet · 500 mg | Limited evidence | 68 | €10–15 | Immunity, Skin & hair, Lasting energy |
| Collagen peptides + vitamin C 10 to 15 g | Emerging evidence | 67 | €30–35 | Joints, Skin & hair, Recovery |
| Sugar-free electrolytes (sticks) 1 stick · 500 ml | Emerging evidence | 65 | €25–30 | Lasting energy, Recovery, Concentration |
| Bioavailable curcumin 500 mg 1 to 2 capsules | Emerging evidence | 64 | €25–30 | Joints, Recovery, Longevity |
| Ashwagandha (standardised extract) 600 mg 1 to 2 capsules · 300–600 mg | Emerging evidence | 57 | €25–30 | Stress & anxiety, Deep sleep, Strength & muscle |
| Multi-strain probiotic 20 bn CFU 1 capsule | Emerging evidence | 56 | €25–30 | Digestion & microbiome, Immunity, Stress & anxiety |
No product matches these criteria.
The index weighs four criteria: evidence 40 %, dose and form 25 %, effect per euro 20 %, tolerance 15 %. The budget is an editorial benchmark, not the Amazon price.