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Slow Flow

Vitanica
4.2
★ ★ ★ ★ ★
(2233 ratings)
Vitamin C 500 mg
Vitamin A 5000 IU
Ginger
Vitamin K 150 mcg
Product Image
Score65
A narrowly targeted menstrual-flow blend with buffered vitamin C, but label ambiguity and significant clotting and pregnancy considerations limit general use.
How scoring works
Quantity:60 Capsule(s) • (20 servings)
Goals:
Anti-Inflammatory Support
Immunity
Skin Health

Score 65

A narrowly targeted menstrual-flow blend with buffered vitamin C, but label ambiguity and significant clotting and pregnancy considerations limit general use.
How scoring works
$21.75($1.08 per serving)
iHerb
$ 21.75
Amazon
$ 21.75
Pure Formulas
$ 21.75
Vitacost
$ 21.75
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Analysis

Calcium ascorbate, citrus bioflavonoids, and ginger offer antioxidant and botanical support within a menstrual-flow design. Individual amounts are mostly disclosed, and the vitamin C form may be gentler than plain ascorbic acid.

Two identical yarrow entries create label ambiguity, while shepherd’s purse, cranesbill, and life root lack useful standardization details. Vitamin K1 and preformed vitamin A add specific nutrient roles but do not make the product a balanced general-health formula.

The formula is intended for a narrow use and should not be chosen as a routine heart, bone, or anti-aging supplement. People using anticoagulants or who are pregnant need particular caution because of vitamin K1, ginger, hemostatic herbs, and retinyl palmitate.

Who is it for
  • Adults specifically seeking menstrual-flow support
  • Users who value disclosed botanical weights
Best for
  • Targeted menstrual-flow use
  • Buffered vitamin C with bioflavonoids

Pros

  • Meaningful buffered vitamin C amount
  • Substantial citrus bioflavonoids
  • Most active weights are disclosed

Cons

  • Duplicate yarrow entries reduce clarity
  • Several herbs lack standardization
  • Poor fit for broad wellness goals

Warnings

  • Vitamin K1 can counteract warfarin and related vitamin K antagonist medicines.
  • Preformed vitamin A should not be stacked with other retinol supplements, especially during pregnancy.
  • Ginger and hemostatic herbs may complicate bleeding management around anticoagulants or surgery.

Nutrient quality

67 High impact

Buffered vitamin C, vitamin K, and ginger have plausible roles in the specialized design. Duplicate yarrow entries, uncertain botanical forms, and a broad goal list weaken confidence in fit and balance.

Ingredient transparency

72 High impact

Amounts are stated and no proprietary blend hides the ingredients. Duplicate yarrow entries, an ambiguous life root name, missing excipients, and limited use directions reduce clarity.

Customer satisfaction

66 High impact

The average rating is generally positive, with a very large review count supporting the signal. No detailed reviews are supplied to assess recurring complaints or experiences tied to the intended use.

Value for money

55 Moderate impact

Several substantial ingredients provide a specialized combination. Label ambiguities, a short supply, and narrow practical suitability make the value mixed.

Report analysis

Goals

Anti-Inflammatory Support
Cellular Defense
Anti-Inflammatory Support
Impact
High effect
B- Goal FitB Strength of SupportB- CoverageB Formula Quality
Vitamin C · 500 mg

Ginger at 375 mg adds direct botanical relevance alongside 500 mg buffered vitamin C and citrus bioflavonoids. The ginger lacks extract standardization, so its active strength is less certain than a clearly standardized product.

Yarrow and astringent botanicals make sense for the formula’s intended menstrual-flow use but add less certainty for broad systemic inflammation. Vitamin K can interfere with warfarin therapy and should be considered by users of that medicine.

Study evidence
Ginger Supportive 30 studies
Vitamin C Supportive 50 studies
Immunity
Immunity
Impact
Moderate effect
C Goal FitB Strength of SupportC CoverageD- Formula Quality
Vitamin C · 500 mgVitamin A · 5000 IU

Buffered vitamin C reaches a useful immune-support amount, while vitamin A contributes to normal barrier function. Citrus bioflavonoids and ginger add related antioxidant and botanical support.

The formula is designed for menstrual flow rather than immunity, and several botanicals lack standardization details. Preformed vitamin A can accumulate during pregnancy, while vitamin K can interfere with warfarin.

Study evidence
Ginger Not classified

No linked studies yet.

Vitamin A Supportive 107 studies
Vitamin C Supportive 53 studies
Skin Health
Skin Health
Impact
Moderate effect
C Goal FitB- Strength of SupportC+ CoverageF Formula Quality
Vitamin C · 500 mg

Vitamin A supports cell turnover, while vitamin C and bioflavonoids support collagen synthesis and antioxidant defense. Those ingredients provide some skin relevance, but the formula is primarily designed for menstrual flow.

Buffered vitamin C is favorable, whereas preformed vitamin A can accumulate and should not be stacked with other retinol sources. Pregnancy is a particular concern for preformed vitamin A, and most included botanicals do not target skin outcomes.

Study evidence
Vitamin A Supportive 106 studies
Vitamin C Supportive 53 studies

Ingredients

IngredientAmount per serving
Vitamin A (Retinyl Palmitate)
 5000 IU
Vitamin C (Calcium Ascorbate)
 500 mg
Vitamin K1 (Phytonadione)
 150 mcg
Calcium (Calcium Ascorbate)
 55 mg
Bioflavonoids (Citrus)
 500 mg
Ginger
375 mg
Yarrow
300 mg
Shepherd's Purse
200 mg
Cranesbill
200 mg
Life Root Aerial Parts Extract (Senecio Aureus Aerial Parts Extract)
 150 mg
Gluten Free Vegan Dairy Free Women Women 18–50 Vegetarian
Report overview
Vitamin C (Calcium Ascorbate) · 500 mg OverallScore73
B+ Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyF Value

Calcium ascorbate supplies buffered vitamin C with the accompanying elemental calcium clearly listed. The 500 mg dose is well targeted and likely gentler than plain ascorbic acid. Vitamin C cost efficiency is poor because the formula is built around several additional botanicals.

View ingredientView products
Vitamin A (Retinyl Palmitate) · 5000 IU OverallScore59
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyF Value

The vitamin A dose is useful, but it comes entirely from preformed retinyl palmitate rather than a naturally regulated carotenoid source. The dry vegetarian capsule lacks a disclosed oil carrier, so taking it with a meal containing fat may support absorption. Preformed vitamin A can accumulate, making it important to avoid stacking it with other retinol supplements, especially during pregnancy.

View ingredientView products
Ginger · 375 mg OverallScore44
F Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyD- Value

The disclosed ginger amount can serve as a supportive dose, but the label gives no plant part, extraction method, or active-marker standardization. Clear quantity disclosure is a strength within the multi-botanical formula. Value for ginger is limited because the serving cost is high for a moderate, non-standardized amount.

View ingredientView products
Loading alternative details
77 Performance

Immune Intensive

Seeking Health
<p>Buffered vitamin C, zinc citrate, vitamin D3, and vitamin K2 form a compact, clearly targeted nutrient blend with much broader general-health and immune coverage. The vitamin D amount is high and preformed vitamin A needs care, while the formula is not a substitute for the original's astringent herbs.</p>
75 Performance

Immufight Respiratory Support

Solaray
<p>Vitamin C, vitamin D, zinc, selenium, monolaurin, quercetin, ginger, and bromelain provide broader immune and anti-inflammatory coverage. Berberine and grapefruit extract create interaction concerns, and the blend is less specific to flow-related support.</p>
73 Performance

Ener-C Orange

Pauling Labs
<p>A substantial vitamin C dose with clearly listed supporting micronutrients offers broader daily-health coverage and easier active-dose assessment. Missing inactive ingredients and the absence of specialized flow-support herbs limit direct comparability.</p>
55 Budget

Airborne Original Berry

Airborne
<p>A lower serving cost provides substantial vitamin C and zinc for broad immune support. Basic nutrient forms and a proprietary herbal blend reduce transparency, and the formula does not replace the original's specialized astringent herbs.</p>
55 Budget

Superfood Wild Berry

Greens+ Organics
<p>A lower serving cost supplies beta-carotene, modest iron, and broad plant ingredients in a superfood format. Large undisclosed blends make dose quality difficult to judge, and there is little direct overlap with the original's flow-oriented purpose.</p>
54 Budget

Green Superfood Energy Lemon-Lime

Amazing Grass
<p>A lower serving cost combines greens, antioxidants, fiber, and digestive ingredients for broad daily nutrition. Most amounts and forms are hidden in blends, so the economical powder is less targeted and less transparent than the original.</p>
75 Value

Lemon Lime

Pauling Labs
<p>A substantial vitamin C dose and supporting micronutrients provide broad daily-health coverage at a much lower serving cost. Active amounts are clear, although missing inactive ingredients and no flow-specific botanical core make it a general wellness substitute.</p>
64 Value

Vita Biotic 750 mg

Eclectic Herb
<p>Vitamin C, zinc, echinacea, bioflavonoids, garlic, and ginger broaden immune coverage at a lower serving cost. Aggressive preformed vitamin A and duplicated or mismatched botanical entries weaken label confidence.</p>
77 Value

Organic Wheat Grass

Amazing Grass
<p>A simple wheat-grass powder offers modest vitamin K, potassium, and plant nutrition at a lower serving cost with little formulation clutter. Detailed nutrient forms are limited, and the product does not match the original's specialized astringent-herb purpose.</p>
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. The effect of ginger supplementation on serum C-reactive protein, lipid profile and glycaemia: a systematic review and meta-analysis.
    Mazidi M; Gao HK; Rezaie P; Ferns GA · Food & nutrition research · 2022
    Meta-analysis9 studies pooledAnti-Inflammatory Support forGinger
  2. Ginger supplementation and metabolic health: an umbrella review of meta-analyses of randomized trials.
    Musazadeh V; Morvaridi M; Hosseini-Roknabadi SM; Mahmoudinezhad M; Jafari A; Shidfar F · Diabetology & metabolic syndrome · 2026
    Meta-analysis43,570 participants36 studies pooledAnti-Inflammatory Support forGinger
  3. Effect of Ginger Supplementation on Proinflammatory Cytokines in Older Patients with Osteoarthritis: Outcomes of a Randomized Controlled Clinical Trial.
    Mozaffari-Khosravi H; Naderi Z; Dehghan A; Nadjarzadeh A; Fallah Huseini H · Journal of nutrition in gerontology and geriatrics · 2017
    Randomized trial120 participantsAnti-Inflammatory Support forGinger
  4. Effects of Ginger Supplementation on Markers of Inflammation and Functional Capacity in Individuals with Mild to Moderate Joint Pain.
    Broeckel J; Estes L; Leonard M; Dickerson BL; Gonzalez DE; Purpura M; Jäger R; Sowinski RJ; Rasmussen CJ; Kreider RB · Nutrients · 2025
    Randomized trial30 participantsAnti-Inflammatory Support forGinger
  5. The effect of ginger supplementation on some immunity and inflammation intermediate genes expression in patients with active Rheumatoid Arthritis.
    Aryaeian N; Shahram F; Mahmoudi M; Tavakoli H; Yousefi B; Arablou T; Jafari Karegar S · Gene · 2019
    Randomized trial70 participantsAnti-Inflammatory Support forGinger
  6. Efficacy of Vitamin C as Glucocorticoid Substitute for Reducing Pain and Inflammation After Total Hip Arthroplasty: A Randomized Controlled Trial.
    Jiang W; Xu H; Jiang X; Zhan Y; Ju Y; Xie J; Huang Z; Huang Q; Pei F · The Journal of bone and joint surgery. American volume · 2025
    Randomized trial107 participantsAnti-Inflammatory Support forVitamin C
  7. The Impact of Vitamin C on Analgesic, Anti-inflammatory, and Hemostatic Outcomes After Total Hip and Knee Arthroplasty: A Systematic Review and Meta-Analysis.
    Moftakhari Hajimirzaei S; Bagherzadeh Cham M; Dolikhani M; Tabatabaee SM; Ebrahimpour A · The archives of bone and joint surgery · 2026
    Meta-analysis1,162 participants10 studies pooledAnti-Inflammatory Support forVitamin C
  8. The impact of vitamin C supplementation on the perioperative outcomes after total hip and knee arthroplasty: a systematic review and meta-analysis.
    Liu X; Guo J; Li Y; Yang Y; Liu M; Gao Q; Yang Y; Wu X; Yue C · BMC musculoskeletal disorders · 2026
    Meta-analysis852 participants8 studies pooledAnti-Inflammatory Support forVitamin C
  9. Therapeutic Impact of Ascorbic Acid on Oral and Periodontal Tissues: A Systematic Literature Review.
    Ruzijevaite G; Acaite E; Jagelaviciene E · Medicina (Kaunas, Lithuania) · 2025
    Systematic review811 participants17 studies pooledAnti-Inflammatory Support forVitamin C
  10. Oral vitamin C administration reduces early recurrence rates after electrical cardioversion of persistent atrial fibrillation and attenuates associated inflammation.
    Korantzopoulos P; Kolettis TM; Kountouris E; Dimitroula V; Karanikis P; Pappa E; Siogas K; Goudevenos JA · International journal of cardiology · 2005
    Randomized trial44 participantsAnti-Inflammatory Support forVitamin C
  11. Depressed immune response to tetanus in children with vitamin A deficiency.
    Semba RD; Muhilal; Scott AL; Natadisastra G; Wirasasmita S; Mele L; Ridwan E; West KP; Sommer A · The Journal of nutrition · 1992
    Randomized trial236 participantsImmunity forVitamin A
  12. Impact of a single megadose of vitamin A at delivery on breastmilk of mothers and morbidity of their infants.
    Roy SK; Islam A; Molla A; Akramuzzaman SM; Jahan F; Fuchs G · European journal of clinical nutrition · 1997
    Randomized trial50 participantsImmunity forVitamin A
  13. Vitamin A supplementation reduces measles morbidity in young African children: a randomized, placebo-controlled, double-blind trial.
    Coutsoudis A; Broughton M; Coovadia HM · The American journal of clinical nutrition · 1991
    Randomized trial60 participantsImmunity forVitamin A
  14. Vitamin A supplementation enhances specific IgG antibody levels and total lymphocyte numbers while improving morbidity in measles.
    Coutsoudis A; Kiepiela P; Coovadia HM; Broughton M · The Pediatric infectious disease journal · 1992
    Randomized trial60 participantsImmunity forVitamin A
  15. Vitamin A supplementation reduces the monocyte chemoattractant protein-1 intestinal immune response of Mexican children.
    Long KZ; Santos JI; Estrada Garcia T; Haas M; Firestone M; Bhagwat J; Dupont HL; Hertzmark E; Rosado JL; Nanthakumar NN · The Journal of nutrition · 2006
    Randomized trial127 participantsImmunity forVitamin A
  16. Vitamin C and contribution to the normal function of the immune system: evaluation of a health claim pursuant to Article 14 of Regulation (EC) No 1924/2006.
    EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) · EFSA journal. European Food Safety Authority · 2026
    Guideline / consensusImmunity forVitamin C
  17. Therapeutic effects of high-dose vitamin C supplementation in patients with COVID-19: a meta-analysis.
    Sun L; Zhao JH; Fan WY; Feng B; Liu WW; Chen RQ; Ban C; Dang AG; Wang M; Luo KT; Zhou GY; Yu FF; Ba Y · Nutrition reviews · 2024
    Meta-analysis2,334 participants14 studies pooledImmunity forVitamin C
  18. Effect of micronutrient supplements on influenza and other respiratory tract infections among adults: a systematic review and meta-analysis.
    Abioye AI; Bromage S; Fawzi W · BMJ global health · 2021
    Meta-analysisImmunity forVitamin C
  19. New evidence for antioxidant properties of vitamin C.
    Vojdani A; Bazargan M; Vojdani E; Wright J · Cancer detection and prevention · 2001
    Randomized trial20 participantsImmunity forVitamin C
  20. Enhanced Vitamin C Delivery: A Systematic Literature Review Assessing the Efficacy and Safety of Alternative Supplement Forms in Healthy Adults.
    Calder PC; Kreider RB; McKay DL · Nutrients · 2025
    Systematic review13 studies pooledImmunity forVitamin C
  21. Efficacy and Tolerability of Topical 0.1% Stabilized Bioactive Retinol for Photoaging: A Vehicle-Controlled Integrated Analysis.
    Farris P; Berson D; Bhatia N; Goldberg D; Lain E; Mariwalla K; Zeichner J; Miller D; McGuire T; Kizoulis M · Journal of drugs in dermatology : JDD · 2024
    Meta-analysis471 participants6 studies pooledSkin Health forVitamin A
  22. Tensile properties and contours of aging facial skin. A controlled double-blind comparative study of the effects of retinol, melibiose-lactose and their association.
    Piérard-Franchimont C; Castelli D; Cromphaut IV; Bertin C; Ries G; Cauwenbergh G; Piérard GE · Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI) · 2016
    Randomized trial120 participantsSkin Health forVitamin A
  23. Antiaging action of retinol: from molecular to clinical.
    Bellemère G; Stamatas GN; Bruère V; Bertin C; Issachar N; Oddos T · Skin pharmacology and physiology · 2009
    Randomized trial48 participantsSkin Health forVitamin A
  24. An Updated Review of Topical Tretinoin in Dermatology: From Acne and Photoaging to Skin Cancer.
    Balado-Simó P; Morgado-Carrasco D; Gómez-Armayones S; López-Ferrer A; Barco D; Ferrándiz-Pulido C; Podlipnik S · Journal of clinical medicine · 2025
    Narrative reviewSkin Health forVitamin A
  25. Novel Cyclized Hexapeptide-9 Outperforms Retinol Against Skin Aging: A Randomized, Double-Blinded, Active- and Vehicle-Controlled Clinical Trial.
    Chang H; Tao K; Yang Y; Wang Y; Ge M; Wang X; Tang S; Yu H · Journal of cosmetic dermatology · 2025
    Randomized trialSkin Health forVitamin A
  26. Evaluation of the anti-wrinkle effect of an ascorbic acid-loaded dissolving microneedle patch via a double-blind, placebo-controlled clinical study.
    Lee C; Yang H; Kim S; Kim M; Kang H; Kim N; An S; Koh J; Jung H · International journal of cosmetic science · 2017
    Randomized trial23 participantsSkin Health forVitamin C
  27. Comparative Study on the Outcome of Periorbital Wrinkles Treated with Laser-Assisted Delivery of Vitamin C or Vitamin C Plus Growth Factors: A Randomized, Double-blind, Clinical Trial.
    Machado BHB; Frame J; Zhang J; Najlah M · Aesthetic plastic surgery · 2021
    Randomized trial149 participantsSkin Health forVitamin C
  28. Randomized trial of topical ascorbic acid in DMSO versus imiquimod for the treatment of basal cell carcinoma.
    Burke B; Bailie JE · Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie · 2022
    Randomized trial25 participantsSkin Health forVitamin C
  29. Vitamin C improves healing of foot ulcers: a randomised, double-blind, placebo-controlled trial.
    Gunton JE; Girgis CM; Lau T; Vicaretti M; Begg L; Flood V · The British journal of nutrition · 2022
    Randomized trial16 participantsSkin Health forVitamin C
  30. Dietary nutrient intakes and skin-aging appearance among middle-aged American women.
    Cosgrove MC; Franco OH; Granger SP; Murray PG; Mayes AE · The American journal of clinical nutrition · 2007
    Cross-sectional study4,025 participantsSkin Health forVitamin C