Thorne Basic Prenatal: Ingredients, Dosage & Who It Fits

Quick answer: Thorne Basic Prenatal is a three-capsule daily multivitamin for women who are trying to conceive, pregnant or nursing. Each serving carries 1,000 mcg of folate as L-5-methyltetrahydrofolate (5-MTHF, 1,700 mcg DFE), 45 mg of iron as ferrous bisglycinate chelate, 110 mg of choline, 150 mcg of iodine and 1,000 IU of vitamin D3. Take 3 capsules a day with food, and plan on a separate omega-3, because it contains no DHA.

Clinical review pending — Holistic Health Partners

Odette Villanueva has worked the pharmacy counter in Brevard for twenty-two years and can read a supplement label upside down. When Jenna Holcomb, 36, a veterinary technician who had just started trying for her first baby, set a bottle of sour-apple prenatal gummies on the counter and asked whether they were enough, Odette turned it over. Folate, yes. No iron, no iodine, and a sugar line longer than the mineral list. She wrote three words on a sticky note, iron, iodine, choline, and told Jenna to take it to her midwife, who came back with a few names, one of them Thorne Basic Prenatal.

That sticky note is a decent way to read any prenatal label. Here's how this one stacks up.

What is Thorne Basic Prenatal?

It's Thorne's prenatal multivitamin and mineral, built for the stretch from trying to conceive through pregnancy and nursing, and taken as 3 capsules a day. Thorne® Basic Prenatal comes in a 90-capsule bottle, which is 30 servings or one month.

Three things set the formula apart on the label. The folate is the methylated form, 5-MTHF, rather than folic acid. The iron is a chelated form, ferrous bisglycinate, at a full 45 mg. And the B12 is methylcobalamin, so Thorne describes it as a methylated multi. The capsule shell is hypromellose (derived from cellulose), the only other listed ingredient is calcium laurate, and our listing notes it's free of gluten, dairy and soy. The product carries NSF Certified for Sport, which means batches are tested for label accuracy and for close to 300 substances banned in sport.

What it doesn't contain matters just as much: there's no DHA or other omega-3 in the capsules. Thorne sells that piece separately, which we'll get to below.

What's in Basic Prenatal, and what does each key ingredient do?

The short version: folate for cell division, iron for the larger blood supply of pregnancy, choline for cell membranes and nerve development, iodine for thyroid hormone, and vitamin D with calcium for bone. Here's the full serving of Basic Prenatal, per 3 capsules, from Thorne's label.

Why 5-MTHF instead of folic acid?

5-MTHF is the form of folate that already circulates in your blood, so your body doesn't have to convert it first, which is why practitioners often reach for it for women who carry common MTHFR gene variants. The 1,000 mcg on the label works out to 1,700 mcg DFE (dietary folate equivalents), the unit labels now use to compare folate forms.

One fair caveat belongs here. The large studies behind the advice to take folate before and in early pregnancy used folic acid. A 2024 evidence-based review in Nutrients compared the two forms on structure, metabolism, bioavailability and safety and concluded that 5-MTHF is a promising alternative, but that clinical studies of 5-MTHF for early neural tube development are still lacking. That doesn't make it a worse choice; it means the decision between forms is worth a quick word with your OB or midwife, especially if you've been told to take a higher folate dose.

Why does the iron form matter?

Ferrous bisglycinate is an amino acid chelate that tends to be easier on the stomach than the iron salts found in many drugstore prenatals. A 2023 systematic review and meta-analysis pooled nine randomized trials in pregnant women and found that 4 to 20 weeks of ferrous bisglycinate produced higher hemoglobin than other iron supplements, with about a third the rate of reported gastrointestinal side effects (incidence rate ratio 0.36).

The amount is the other half of the story. According to the NIH Office of Dietary Supplements, the iron RDA in pregnancy is 27 mg a day, and the tolerable upper intake level for adults, pregnancy included, is 45 mg. Basic Prenatal's 45 mg sits right at that line, before counting iron from food. That suits a woman whose practitioner wants a full iron dose; it's more than someone with healthy iron stores may need. The same fact sheet puts the RDA during breastfeeding at 9 mg, which is why the iron conversation is worth having again after delivery.

Is 110 mg of choline enough?

No, and no capsule-based prenatal gets you all the way there. The NIH choline fact sheet sets the adequate intake at 450 mg a day in pregnancy and 550 mg while breastfeeding, and notes that prenatal supplements typically contain little if any choline. Basic Prenatal's 110 mg is a contribution, not the target. Eggs, meat, fish, soybeans and dairy carry the rest.

The research is why choline earns a spot on the sticky note at all. In a small randomized, double-blind feeding study at Cornell, 26 women entering their third trimester ate controlled diets with either 480 mg or 930 mg of choline a day until delivery. Infants in the 930 mg group showed faster information processing speed on tests from 4 to 13 months. It's an early, small trial, but it's a good reason not to treat the 110 mg as the whole answer.

What about iodine, vitamin D and calcium?

Iodine supports normal thyroid hormone production, and the 150 mcg here as potassium iodide is a common amount for a prenatal. The 1,000 IU of vitamin D3 helps your gut absorb calcium. The 180 mg of calcium is modest by design: a full calcium dose would add several large capsules, so most of your calcium is meant to come from food. Vitamin A is split between beta carotene and 600 mcg of preformed palmitate, a balance worth knowing if you also take cod liver oil or another A-containing product.

How do you take Basic Prenatal?

Take 3 capsules daily with food, or as your health-care practitioner recommends. Here's how that plays out day to day with Thorne Basic Prenatal.

A few practical notes:

• Retire your old multivitamin. Stacking two multis pushes iron, vitamin A and zinc past where you want them.
• Space it from thyroid medication. The NIH iron fact sheet notes iron can interact with levothyroxine. If you take it, ask your prescriber or pharmacist how far apart to keep them.
• Morning queasiness? Taking the capsules with dinner instead of breakfast is a simple first move.
• Store it locked up. The label warns that accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under six. Keep the bottle out of reach of toddlers.

Who is Basic Prenatal for, and who should skip it?

Basic Prenatal is a strong fit for women planning a pregnancy, pregnant or nursing who want methylated folate and B12, a chelated iron form, and a short ingredient list without coatings. It also suits women who've had stomach trouble with other iron-containing prenatals and athletes who want the NSF Certified for Sport mark.

Talk with your practitioner first, or choose another formula, if you:

• Take warfarin (Coumadin) or another anticoagulant. The label says vitamin K interferes with these drugs and advises against using them together.
• Take methotrexate as cancer therapy. Thorne's label says 5-MTHF is not recommended alongside it. The label also notes this folate form has not been shown to interfere with methotrexate at the lower doses used for psoriasis or rheumatoid arthritis, but your prescriber should still know.
• Have been told your iron is already high, or have a condition that raises iron stores. 45 mg a day is a full dose.
• Have reacted to iodine before. The label notes iodine may occasionally cause an allergic reaction.
• Are sensitive to vitamin C in larger amounts. The label notes vitamin C can loosen stools in some people; 150 mg is moderate, but it adds up with other products.
• Find swallowing capsules hard. Three a day is manageable for most people, but a few reviewers mention capsule size and taste.

Thorne's label also says to consult your health-care practitioner if you're pregnant, which is standard advice for every prenatal. If you'd like a second set of eyes on your current routine, Holistic Health Partners offers a free product consultation.

How does Basic Prenatal compare with other prenatal vitamins we carry?

All three multis below use 5-MTHF folate; they differ most in iron, choline, capsule count and cost. Thorne's own Prenatal DHA is in the last column because it fills the one gap the multis share.

Prices are current Covenant Health Products prices at the time of writing and can change. Pure and Xymogen figures come from the label panels on our product listings and Pure Encapsulations' product page.

How to read it: if your practitioner wants a full iron dose and you like the NSF testing, Thorne Basic Prenatal is the one. If your iron is fine and you'd rather swallow two capsules a day, Pure Encapsulations® PreNatal Nutrients keeps iron at the 27 mg pregnancy RDA and is the least expensive per day on the 120-count bottle. If you want more choline, iodine and vitamin D in the capsule itself and don't mind five capsules, Xymogen® Prenatal Essentials carries the most of those three.

Does Basic Prenatal have DHA, or do you need a separate one?

It has none, so if you want DHA you'll take it separately. Thorne designed it that way: its FAQ describes Thorne Prenatal DHA as the companion formula, with no overlapping nutrients, so the two can be taken together. Prenatal DHA supplies 650 mg of DHA and 200 mg of EPA per 2 gelcaps from fish oil, with mint and rosemary added to help with fish burps. If you don't eat fatty fish regularly, ask your practitioner whether the pair makes sense for you. If you're allergic to fish or shellfish, Prenatal DHA isn't the right add-on.

Is Thorne Basic Prenatal worth it?

Yes, if your practitioner wants you on active folate and a full, gentle-form iron dose. Thorne Basic Prenatal gives you 1,000 mcg of 5-MTHF, 45 mg of ferrous bisglycinate, methylcobalamin B12 and 150 mcg of iodine in 3 plain capsules, with NSF Certified for Sport testing behind it, for about $1.23 a day.

It's not the whole plan. You'll still need choline from food, DHA from fish or a separate gelcap, and a check on whether 45 mg of iron is right for you, especially once you're nursing. If two capsules a day or a lower iron dose sounds better, Pure Encapsulations PreNatal Nutrients is the closest alternative.

Jenna, for what it's worth, kept the sticky note. It's on the inside of her kitchen cabinet, next to the bottle her midwife picked, and it now has a fourth word on it in her own handwriting: DHA.

Keep reading

• Thorne Methyl Guard Plus: Benefits, Side Effects & How It Works, for more on methylated folate and B12
• Thorne Curcumin Phytosome 1000 mg: Benefits, Side Effects & How It Works

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.