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Dietary supplement

Folate 1,333 MCG DFE (Folic Acid 800 mcg) Ingredients & Drug Interactions

by Solgar

Tablet Or Pill Category: Vitamin
Most serious interaction: Moderate
The interaction bottom line Most serious interaction: Moderate

Folate 1,333 MCG DFE (Folic Acid 800 mcg) is a dietary supplement by Solgar with 1 active ingredient. Its ingredients are commonly taken for preventing neural tube birth defects, treating or preventing folate deficiency, supporting pregnancy health.Based on those ingredients, 40 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Folic Acid. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

HelloPharmacist Scorecard of Folate 1,333 MCG DFE (Folic Acid 800 mcg) by Solgar

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • “Folate” is listed as a grouped ingredient — the label gives one combined amount (1,333 mcg DFE) without saying how much of each component you get.

This product contains one active ingredient: folic acid (also called folate), a B vitamin your body needs to make new cells and DNA. The 800 mcg of folic acid in each tablet delivers the equivalent of 1,333 mcg DFE — a measurement that accounts for how well your body absorbs it.

The tablet also contains inactive ingredients (dicalcium phosphate, microcrystalline cellulose, stearic acid, vegetable cellulose, and silica), which are fillers and binders that hold it together.

Does it work?

Strong evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Strong

Clinical evidence supports at least one of this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: Heart health and prenatal support.
  • We looked for evidence on: Folate deficiency, Neural tube birth defects, Abdominal wall defects, Oral clefts, Low birth weight, Fetal and premature infant mortality — and 4 related terms.
  • The strongest evidence on file: Folic Acid is rated "Effective" for Folate deficiency (Natural Medicines).
  • Also on file: Folic Acid is rated "Likely Effective" for Neural tube birth defects.
  • Also on file: Folic Acid is rated "Possibly Ineffective" for Anemia, Pre-eclampsia, Fetal and premature infant mortality.

Folic acid in this dose is effective for treating folate deficiency and likely effective for preventing neural tube birth defects (the reason it's recommended during pregnancy) and for reducing side effects of methotrexate. The evidence is less clear for depression, gingival hyperplasia (overgrowth of gum tissue caused by phenytoin), and cognitive impairment — those uses are rated as possibly effective, meaning the evidence suggests promise but isn't conclusive yet.

The evidence, ingredient by ingredient Folic Acid

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

At the dose in this product (800 mcg), folic acid is generally well-tolerated and considered safe for most adults. It's safe during pregnancy at standard prenatal doses to help prevent birth defects, and it's considered safe at normal recommended doses while breastfeeding.

At much higher doses (15 mg daily), some people report bitter taste, nausea, sleep problems, and vivid dreaming. One important caution: folic acid can mask the symptoms of pernicious anemia (a serious vitamin B12 deficiency), potentially delaying diagnosis and leading to permanent nerve damage — don't self-treat suspected anemia without a doctor's workup first.

Very large doses may also worsen nerve problems in people with undiagnosed B12 deficiency.

Side effects, ingredient by ingredient Folic Acid

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Folic Acid.
  • The most serious interaction on file is rated Moderate.
  • For scale: 40 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

If you take phenobarbital (Luminal), phenytoin (Dilantin), or primidone (Mysoline) for seizures, methotrexate for cancer, capecitabine (Xeloda), 5-fluorouracil, or pyrimethamine (Daraprim), check with your pharmacist before starting this supplement — all are Moderate severity interactions.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with clinical evidence supporting its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

This is a straightforward folate supplement, effective for preventing deficiency and supporting pregnancy health. If you take seizure medications, cancer drugs, or pyrimethamine, you need to check with your pharmacist before starting.

Also make sure your B12 level is healthy, since folic acid can hide B12 problems.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Dec 26, 2020.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Folate 1,333 MCG DFE (Folic Acid 800 mcg), straight from the product label.

Brand Solgar
Barcode (UPC) 033984011014
Net contents 250 Tablet(s)
Market status On market
Date entered into DSLD Dec 26, 2020
DSLD ID 241080
Product type Vitamin
Supplement form Tablet Or Pill
Dietary claims / uses All Other, Approved Health, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Kosher, Pregnant Women, Gluten Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Folate 1,333 MCG DFE (Folic Acid 800 mcg) by Solgar, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Tablet(s)
Maximum serving Sizes:
1 Tablet(s)
UPC/BARCODE
033984011014
IngredientAmount% DV
Folic Acid800 mcg--
Folate1333 mcg DFE333%

Other ingredients: Dicalcium Phosphate, Microcrystalline Cellulose, Stearic Acid, Vegetable Cellulose, Silica

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Formula

Folic acid is a water-soluble B Vitamin and member of the B Complex. Folic acid intake is important for pregnant women and helps promote heart health. Folic acid helps maintain healthy levels of homocysteine already within a normal range by helping convert homocysteine into methionine. In addition, it plays a significant role in the health of red blood cells, and helps support a healthy nervous system.

Prenatal Support

Solgar’s KOF-K certification # K-1250

Precautions

Adequate folate levels may reduce a woman’s risk of having a child with a brain or spinal cord defect.

If you are pregnant, nursing, taking any medication or have a medical condition, please consult your healthcare practitioner before taking any dietary supplement.

Keep out of reach of children.

Do not use if outer bottle seal is missing or damaged.

Seals/Symbols

Total Folic Acid intake should not exceed 1000 mcg (1,667 mcg DFE) per day.

GF Certified Gluten-Free

K Parve

Brand IP Statement(s)

Copyright 2019 Solgar, Inc.

General Statements

Solgar Since 1947

Heart health

DV = Daily Value

Formulation

Non-GMO Gluten, Wheat & Dairy free

Suitable for Vegans

Free Of: Gluten, wheat, dairy soy yeast, sugar, sodium, artificial flavor, sweetener and color.

FDA Statement of Identity

Dietary Supplemtent

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement for adults, take one (1) tablet daily, preferably at mealtime, or as directed by a healthcare practitioner.

Discontinue use and consult your healthcare practitioner if any adverse reactions occur.

Storage

Store at room temperature.

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

See for yourself

Folate 1,333 MCG DFE (Folic Acid 800 mcg) by Solgar label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

What’s inside

The Ingredients in Folate 1,333 MCG DFE (Folic Acid 800 mcg) by Solgar

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 Tablet(s) Dosage formTablet Or Pill Amounts shown are per serving.

Folate

1333 mcg DFE per serving

Other (inactive) ingredients: Dicalcium Phosphate, Microcrystalline Cellulose, Stearic Acid, Vegetable Cellulose, Silica. These complete the product’s ingredient list but are not active constituents.

Interaction report

Folate 1,333 MCG DFE (Folic Acid 800 mcg) by Solgar Drug Interactions

Want to check YOUR meds against Folate 1,333 MCG DFE (Folic Acid 800 mcg)?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

Go to the checker
40Drugs
40 Moderate

Ingredients driving the most interactions

Each ingredient & the kinds of drugs it affects

For each ingredient in Folate 1,333 MCG DFE (Folic Acid 800 mcg) with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Folic Acid7 drug types · 40 drugs

5-Fluorouracil

Theoretically, high doses of folic acid might increase the toxicity of 5-fluorouracil.
Increases in gastrointestinal side effects of 5-fluorouracil, such as stomatitis and diarrhea, have been described in two clinical studies when leucovorin, a form of folic acid, was administered with 5-fluorouracil.

Likelihood Possible Evidence D
Capecitabine (Xeloda)

Use of high-dose folic acid might contribute to capecitabine toxicity.
Clinical research suggests that higher serum folate levels are associated with an increased risk for moderate or severe toxicity during capecitabine-based treatment for colorectal cancer. Additionally, in one case report, taking folic acid 15 mg daily might have contributed to increased toxicity, including severe diarrhea, vomiting, edema, hand-foot syndrome, and eventually death, in a patient prescribed capecitabine.

Likelihood Possible Evidence D
Methotrexate (Trexall, Others)

Folic acid might reduce the efficacy of methotrexate as a cancer treatment when given concurrently.
Methotrexate exerts its cytotoxic effects by preventing conversion of folic acid to the active form needed by cells. There is some evidence that folic acid supplements reduce the efficacy of methotrexate in the treatment of acute lymphoblastic leukemia, and theoretically they could reduce its efficacy in the treatment of other cancers. Advise cancer patients to consult their oncologist before using folic acid supplements. In patients treated with long-term, low-dose methotrexate for rheumatoid arthritis (RA) or psoriasis, folic acid supplements can reduce the incidence of side effects, without reducing efficacy.

Likelihood Probable Evidence B
Phenobarbital (Luminal)

Folic acid might have antagonistic effects on phenobarbital and increase the risk for seizures.
Folic acid can have direct convulsant activity in some people, reversing the effects of phenobarbital and worsening seizure control. Monitor closely for increased seizure activity.

Likelihood Probable Evidence B
Phenytoin (Dilantin)

Folic acid might reduce serum levels of phenytoin in some patients.
Folic acid may be a cofactor in phenytoin metabolism. Folic acid, in doses of 1 mg daily or more, can reduce serum levels of phenytoin in some patients. Increases in seizure frequency have been reported. If folic acid supplements are added to established phenytoin therapy, monitor serum phenytoin levels closely. If phenytoin and folic acid are started at the same time and continued together, adverse changes in phenytoin pharmacokinetics are avoided. Note that phenytoin also reduces serum folate levels.

Likelihood Probable Evidence B
Primidone (Mysoline)

Folic acid might have antagonistic effects on primidone and increase the risk for seizures.
Folic acid can have direct convulsant activity in some people, reversing the effects of primidone and worsening seizure control. Monitor closely for increased seizure activity. Note that primidone also reduces serum folate levels.

Likelihood Probable Evidence B
Pyrimethamine (Daraprim)

Folic acid might antagonize the effects of pyrimethamine.
Folic acid can antagonize the antiparasitic effects of pyrimethamine against toxoplasmosis and Pneumocystis carinii pneumonia. Folic acid doesn't antagonize the effects of pyrimethamine in the treatment of malaria, because malarial parasites cannot use exogenous folic acid. Use folinic acid as an alternative to folic acid when indicated.

Likelihood Probable Evidence D
The maker

Brand information

Manufacturer and brand details for Folate 1,333 MCG DFE (Folic Acid 800 mcg), from the product label.

Solgar

See all Solgar products
Name
Solgar, Inc.
Street Address
500 Willow Tree Road
City
Leonia
State
NJ
ZipCode
07605
Phone Number
1-877-765-4274
Pharmacist Counseling Corner

Folate 1,333 MCG DFE (Folic Acid 800 mcg) by Solgar: Common Questions

Does Folate 1,333 MCG DFE (Folic Acid 800 mcg) by Solgar interact with any medications?
Yes. Based on its ingredients, Folate 1,333 MCG DFE (Folic Acid 800 mcg) has a known interaction with 40 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Folate 1,333 MCG DFE (Folic Acid 800 mcg) contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is this safe to take during pregnancy?
Yes — folic acid is recommended during pregnancy at standard prenatal doses to help prevent birth defects. The safety data we hold rates it as likely safe at those doses. Talk to your doctor about the right dose for your pregnancy.
What is the difference between folic acid and folate?
Folate is the natural form of the vitamin found in foods; folic acid is the synthetic form used in supplements and fortified foods. Your body uses both the same way.
Can I take this if I have low B12?
You should check with your pharmacist or doctor first. Folic acid can mask the symptoms of vitamin B12 deficiency (pernicious anemia), which can lead to serious nerve damage if left untreated. Make sure your B12 is checked before starting.
What dose is in this tablet?
Each tablet contains 800 mcg of folic acid, which equals 1,333 mcg DFE — a measurement that reflects how well your body absorbs it.
Does this supplement cause side effects at the dose shown?
At this dose, folic acid is generally well-tolerated. Doses under 1 mg daily rarely cause side effects. Much higher doses (5 mg or more daily) can cause stomach cramps, diarrhea, or rash; very high doses may cause sleep problems or nausea.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Folate 1,333 MCG DFE (Folic Acid 800 mcg) label
Go deeper

The Full Monographs Behind Folate 1,333 MCG DFE (Folic Acid 800 mcg)’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Sources

Sources & How We Checked

Folate 1,333 MCG DFE (Folic Acid 800 mcg)'s label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 56 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Folic Acid 56 references
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  10. Morgan SL, Baggott JE, Lee JY, Alarcón GS. Folic acid supplementation prevents deficient blood folate levels and hyperhomocysteinemia during longterm, low dose methotrexate therapy for rheumatoid arthritis: implications for cardiovascular disease preventi
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  24. Lange H, Suryapranata H, De Luca G, et al. Folate therapy and in-stent restenosis after coronary stenting. N Engl J Med 2004;350:2673-81. PubMed
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  33. Whitrow, M. J., Moore, V. M., Rumbold, A. R., and Davies, M. J. Effect of supplemental folic acid in pregnancy on childhood asthma: a prospective birth cohort study. Am J Epidemiol. 12-15-2009;170(12):1486-1493. PubMed
  34. Collin, S. M., Metcalfe, C., Refsum, H., Lewis, S. J., Zuccolo, L., Smith, G. D., Chen, L., Harris, R., Davis, M., Marsden, G., Johnston, C., Lane, J. A., Ebbing, M., Bonaa, K. H., Nygard, O., Ueland, P. M., Grau, M. V., Baron, J. A., Donovan, J. L., Nea
  35. Baggott, J. E., Oster, R. A., and Tamura, T. Meta-analysis of cancer risk in folic acid supplementation trials. Cancer Epidemiol. 2012;36(1):78-81. PubMed
  36. Fonseca VA, Lavery LA, Thethi TK, et al. Metanx in type 2 diabetes with peripheral neuropathy: A randomized trial. Am J Med 2013;126(2):141-9. PubMed
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  40. Qin X, Fan F, Cui Y, Chen F, Chen Y, Cheng X, Li Y, Wang B, Xu X, Xu X, Huo Y, Wang X. Folic acid supplementation with and without vitamin B6 and revascularization risk: a meta-analysis of randomized controlled trials. Clin Nutr. 2014;33(4):603-12. PubMed
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  46. Valera-Gran D, García de la Hera M, Navarrete-Muñoz EM, Fernandez-Somoano A, Tardón A, Julvez J, Forns J, Lertxundi N, Ibarluzea JM, Murcia M, Rebagliato M, Vioque J; Infancia y Medio Ambiente (INMA) Project. Folic acid supplements during pregnancy and ch
  47. Van Der Woude DA, De Vries J, Van Wijk EM, Verzijl JM, Pijnenborg JM. A randomized controlled trial examining the addition of folic acid to iron supplementation in the treatment of postpartum anemia. Int J Gynaecol Obstet. 2014;126(2):101-5. PubMed
  48. Vila-Nova C, Wehby GL, Queirós FC, Chakraborty H, Félix TM, Goco N, Moore J, Gewehr EV, Lins L, Affonso CM, Murray JC. Periconceptional use of folic acid and risk of miscarriage - findings of the Oral Cleft Prevention Program in Brazil. J Perinat Med. 201 PubMed
  49. Vollset SE, Clarke R, Lewington S, Ebbing M, Halsey J, Lonn E, Armitage J, Manson JE, Hankey GJ, Spence JD, Galan P, Bønaa KH, Jamison R, Gaziano JM, Guarino P, Baron JA, Logan RF, Giovannucci EL, den Heijer M, Ueland PM, Bennett D, Collins R, Peto R; B-V
  50. Wehby GL, Félix TM, Goco N, Richieri-Costa A, Chakraborty H, Souza J, Pereira R, Padovani C, Moretti-Ferreira D, Murray JC. High dosage folic acid supplementation, oral cleft recurrence and fetal growth. Int J Environ Res Public Health. 2013 4;10(2):590-6 PubMed
  51. Fanidi A, Carreras-Torres R, Larose TL, et al. Is high vitamin B12 status a cause of lung cancer? Int J Cancer. 2019 Sep 15;145(6):1499-1503. PubMed
  52. Liu J, Li Z, Ye R, Liu J, Ren A. Periconceptional folic acid supplementation and risk of parent-reported asthma in children at 4-6 years of age. ERJ Open Res. 2020;6(1):00250-2019. PubMed
  53. Houghton LA, Sherwood KL, Pawlosky R, Ito S, O'Connor DL. [6S]-5-Methyltetrahydrofolate is at least as effective as folic acid in preventing a decline in blood folate concentrations during lactation. Am J Clin Nutr. 2006 Apr;83(4):842-50. PubMed
  54. Houghton LA, Yang J, O'Connor DL. Unmetabolized folic acid and total folate concentrations in breast milk are unaffected by low-dose folate supplements. Am J Clin Nutr. 2009 Jan;89(1):216-20. PubMed
  55. Chan SL, Chan AWH, Mo F, et al. Association Between Serum Folate Level and Toxicity of Capecitabine During Treatment for Colorectal Cancer. Oncologist. 2018 Dec;23(12):1436-1445. PubMed
  56. Sarris J, Ravindran A, Yatham LN, et al. Clinician guidelines for the treatment of psychiatric disorders with nutraceuticals and phytoceuticals: The World Federation of Societies of Biological Psychiatry (WFSBP) and Canadian Network for Mood and Anxiety T

See these in context on the Folic Acid monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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