| Challenge | Loomis Enzymes | 1800 mg | — | Powder |
| Challenge | Chiro-Zyme | 1800 mg | — | Powder |
| Fennel | BulkSupplements.com | 1000 mg | — | Powder |
| Gas & Bloating Herbal Tea | Gaia Herbs | 680 mg | — | Other (e.g. tea bag) |
| Digestion Tonic Mint | Vitanica Tasty Tonics | 525 mg | — | Liquid |
| Fennel Seed 480 mg● OTHER INGREDIENTS (1) | Nature's Way | 480 mg | — | Capsule |
| Fennel Seed 480 mg | Vitamin World | 480 mg | — | Capsule |
| Fennel Seed 480 mg● OTHER INGREDIENTS (2) | The Vitamin Shoppe | 480 mg | — | Capsule |
| Full Spectrum Fennel Seed 480 mg● OTHER INGREDIENTS (1) | Swanson | 480 mg | — | Capsule |
| Fennel Seed Powder | TerraVita | 450 mg | — | Powder |
| Fennel Seed 450 mg | TerraVita Premium Collection | 450 mg | — | Capsule |
| Fennel Seed (Certified Organic) 450 mg | TerraVita Premium Collection | 450 mg | — | Capsule |
| Fennel 450 mg | Solaray | 450 mg | — | Capsule |
| Fennel Seed 450 mg | TerraVita | 450 mg | — | Capsule |
| Recovery Zymes● OTHER INGREDIENTS (1) | MNP Michael's Naturopathic Programs | 300 mg | — | Tablet or Pill |
| Recovery Zymes● OTHER INGREDIENTS (2) | MH Michael's Health Naturopathic Programs | 300 mg | — | Tablet or Pill |
| Cleanse & Detox | Gaia Herbs | 276 mg | — | Other (e.g. tea bag) |
| Gastritix● OTHER INGREDIENTS (1) | Nature's Way | 237 mg | — | Capsule |
| Gastrix● OTHER INGREDIENTS (2) | Nature's Way | 237 mg | — | Capsule |
| Anise & Fennel Combination 450 mg | TerraVita | 225 mg | — | Capsule |
| Galangal with Fennel 550 mg● OTHER INGREDIENTS (1) | Hildegard's Original | 220 mg | — | Capsule |
| Soothe Digest● OTHER INGREDIENTS (2) | Natural Factors | 200 mg | — | Capsule |
| Colon Care Complete● OTHER INGREDIENTS (2) | Healthy Choice Naturals | 190 mg | — | Capsule |
| FT | Loomis Enzymes | 180 mg | — | Capsule |
| Digestive Enzymes | MH Michael's Health Naturopathic Programs | 150 mg | — | Capsule |
| Coloclear Extra● OTHER INGREDIENTS (2) | Higher Nature | 150 mg | — | Capsule |
| Gas & Bloating | Gaia Herbs | 146 mg | — | Capsule |
| Aloe Latex 140 mg with Fennel● OTHER INGREDIENTS (2) | Nature's Way | 135 mg | — | Capsule |
| Natural Laxative Tea | Gaia Herbs | 132 mg | — | Other (e.g. tea bag) |
| DigesTech Power Blend● OTHER INGREDIENTS (1) | Onnit | 125 mg | — | Capsule |
| Bitters tonic Vanilla Orange | Vitanica Tasty Tonics | 125 mg | — | Liquid |
| Premenstrual Complex● OTHER INGREDIENTS (2) | Higher Nature | 100 mg | — | Capsule |
| T4 To T8 Bil | Chiro-Zyme | 100 mg | — | Capsule |
| Elimi-Tox PM Cleansing Formula● OTHER INGREDIENTS (2) | Bronson Laboratories | 100 mg | — | Capsule |
| Kidney Cleanse● OTHER INGREDIENTS (2) | NOW | 100 mg | — | Capsule |
| LactationBlend | Vitanica | 100 mg | — | Capsule |
| Bil T4 To T8 | Thera-Zyme | 100 mg | — | Capsule |
| Herbal Detox+ | Health Plus | 100 mg | — | Capsule |
| Easy Cleanse P.M.● OTHER INGREDIENTS (2) | NOW | 100 mg | — | Capsule |
| DIU - Plus | Nutri-West | 100 mg | — | Tablet or Pill |
| Kidney-CL● OTHER INGREDIENTS (1) | New Sun | 100 mg | — | Capsule |
| Silimarina Milk Thistle Complex● OTHER INGREDIENTS (2) | Sunshine Naturals | 100 mg | — | Capsule |
| Milk Thistle Complex● OTHER INGREDIENTS (2) | Sunshine Naturals | 100 mg | — | Capsule |
| GI-BFF ● OTHER INGREDIENTS (1) | Gaia Herbs Pro | 100 mg | — | Capsule |
| FreshMD | Premium Certified | 100 mg | — | Capsule |
| Bil | Loomis Enzymes | 100 mg | — | Capsule |
| Digestion with Enzymes● OTHER INGREDIENTS (1) | Nature's Way | 90 mg | — | Capsule |
| Hepacaps | Wise Woman Herbals | 88 mg | — | Capsule |
| Herbal Detox Drops | Swanson | 86.5 mg | — | Liquid |
| BiliVen | Premier Research Labs | 72 mg | — | Capsule |
| ThymuPlex● OTHER INGREDIENTS (2) | Nature's Way | 65 mg | — | Tablet or Pill |
| Thymuril⚠ EXCEEDS UL● OTHER INGREDIENTS (2) | Integrative Therapeutics | 65 mg | — | Tablet or Pill |
| ThymuPlex Immune Formula● OTHER INGREDIENTS (3) | Nature's Way | 65 mg | — | Capsule |
| Fennel | Zongle Therapeutics | 60 mg | — | Liquid |
| LivPlus | Swiss BioEnergetics | 60 mg | — | Capsule |
| Fennel (Sweet) | doTERRA | 60 mg | — | Liquid |
| Organic Fennel | Zongle Therapeutics | 60 mg | — | Liquid |
| ThyroVen | Premier Research Labs | 54 mg | — | Capsule |
| W.L. Energizer | Priority One Nutritional Supplements | 51 mg | — | Capsule |
| Regulari-T● OTHER INGREDIENTS (1) | LifeSeasons | 50 mg | — | Capsule |
| Bitters Extra | Vitanica | 50 mg | — | Capsule |
| Hydroxycut Ultra Probiotic+ SX-7 Black Onyx● OTHER INGREDIENTS (3) | MuscleTech | 50 mg | — | Capsule |
| Regulari-T Bowel Support● OTHER INGREDIENTS (1) | LifeSeasons | 50 mg | — | Capsule |
| Natural Cleanse Tablets | Viva Vitamins | 50 mg | — | Tablet or Pill |
| IB Soothe-R● OTHER INGREDIENTS (1) | LifeSeasons Therapeutics | 50 mg | — | Capsule |
| Digestivi-T● OTHER INGREDIENTS (1) | LifeSeasons Therapeutics | 45 mg | — | Capsule |
| Keto Digestivi-T● OTHER INGREDIENTS (1) | LifeSeasons Therapeutics | 45 mg | — | Capsule |
| Gastro | TransFormation Professional Protocol | 40 mg | — | Capsule |
| Catalyst-7● OTHER INGREDIENTS (1) | Energetix | 36 mg | — | Capsule |
| GB LIV #3 | Nutri-West Herbals | 35 mg | — | Tablet or Pill |
| #3 - GB-LIV | Nutri-West Herbals | 35 mg | — | Tablet or Pill |
| ReleaseZyme | TransFormation The Genesis of Good Health | 30 mg | — | Capsule |
| Herbal Parasite Guardian | BiOptimizers | 28 mg | — | Capsule |
| Para Guardian | BiOptimizers | 28 mg | — | Capsule |
| Advanced Colon Cleanser● OTHER INGREDIENTS (2) | Puritan's Pride | 25 mg | — | Capsule |
| Colon Cleanser● OTHER INGREDIENTS (2) | Vitamin World | 25 mg | — | Capsule |
| Advanced Detoxapure Colon Cleanser● OTHER INGREDIENTS (2) | Vitamin World | 25 mg | — | Capsule |
| Supergest | Higher Nature | 25 mg | — | Capsule |
| Femtone● OTHER INGREDIENTS (1) | Integrative Therapeutics | 25 mg | — | Capsule |
| Bio Minerals● OTHER INGREDIENTS (2) | Higher Nature | 20 mg | — | Tablet or Pill |
| Digestive Enzymes● OTHER INGREDIENTS (2) | Modere | 20 mg | — | Capsule |
| GastroVen | Premier Research Labs | 20 mg | — | Capsule |
| Calorie Quencher● OTHER INGREDIENTS (2) | Vitamer Laboratories | 15 mg | — | Capsule |
| Carbo Quencher● OTHER INGREDIENTS (2) | VitaCeutical Labs | 15 mg | — | Capsule |
| Super Enzymes● OTHER INGREDIENTS (2) | KAL | 10 mg | — | Tablet or Pill |
| Enzyme Complex With Herbs | VitaCeutical Labs | 5 mg | — | Capsule |
| Enzyme Complex With Herbs | Vitamer Laboratories | 5 mg | — | Capsule |
| Fennel Seed | Banyan Botanicals | 1 Teaspoon(s) | — | Other (e.g. tea bag) |
| Organic Fennel Seed | Banyan Botanicals | 1 Teaspoon(s) | — | Other (e.g. tea bag) |
| Organic Fennel Whl | Banyan Botanicals | 0.5 Teaspoon(s) | — | Unknown |
| Original CCF Tea | Banyan Botanicals | 0 NP | — | Liquid |
| AM - PM Power Cleanse Fiber Blend Formula● OTHER INGREDIENTS (3) | The Vitamin Shoppe | 0 NP | — | Tablet or Pill |
| AM - PM Power Cleanse Herb Blend Formula● OTHER INGREDIENTS (2) | The Vitamin Shoppe | 0 NP | — | Tablet or Pill |
| Fennel | Herb Xtra | 0 NP | — | Capsule |
| intraMAX 2.0 Peach Mango Flavor | Drucker Labs | 0 NP | — | Liquid |
| Organic Fennel Seed | Ra Herbals | 0 NP | — | Liquid |
| Nursing Time Tea Delicious Lemon Flavor | Fairhaven Health Milkies | 0 NP | — | Other (e.g. tea bag) |
| 30 Day Night Slim Skinny Tea | Totally Products | 0 NP | — | Other (e.g. tea bag) |
| Lactation Support SystemSupport Herbal TeaDiscontinued | Gaia Herbs SystemSupport | 900 mg | — | Other (e.g. tea bag) |
| TheraSlimDiscontinued | Klaire Labs | 500 mg | — | Capsule |