What Your TTC Supplement Stack Really Costs per Day — and Which Bottles to Cut First

Short answer: to find what a supplement really costs per day, divide the price by the number of days the bottle lasts at the dose you actually take, not the number of capsules. Do that for every bottle, add them up, and then sort the list by evidence. Cut the weak-evidence and duplicate products first and keep the basics (a prenatal with folic acid, plus anything your clinician has specifically recommended). Most stacks shrink a lot, and the ones that stay are the ones with the best support.

We don't list prices here. They change constantly and vary by store and pack size, so any number we printed would be wrong for you. Instead, use the prices on your own receipts or order history.

Step 1: Calculate cost per day for each bottle

The label tells you two things you need: how many units are in the container (capsules, tablets, gummies or scoops) and the serving size. Then use the dose you actually take, which may differ from the label's serving.

Watch for these label traps

• "Serving size: 3 capsules." A 90-count bottle with a 3-capsule serving lasts 30 days, not 90. Many prenatals and men's blends use multi-capsule servings.
• "Servings per container" vs. "count." Use whichever matches how you take it.
• Gummies. Often two to four per serving, so the bottle goes faster than it looks.
• Powders. Check the scoop size and the number of servings; a big tub can be fewer days than you'd guess.
• Dose instructions from a clinician that differ from the label. Use your real dose.
• Subscriptions and multipacks. Use the price you actually pay per shipment. Our subscription vs. one-time purchase guide covers when subscriptions make sense.

A worked example (letters, not prices)

Say a prenatal bottle has 90 capsules, the serving is 3 capsules, and you paid price P. It lasts 30 days, so the cost per day is P ÷ 30. A CoQ10 bottle has 60 softgels and you take 2 a day: 30 days, cost per day is its price ÷ 30. An omega-3 bottle has 120 softgels at 2 a day: 60 days, so its price ÷ 60. Same "monthly" feel on the shelf, very different daily costs.

Step 2: Build your stack table

List every product both partners take. Include the "small" ones: gummies, powders in smoothies, and anything bought for a different reason, such as hair or immunity. Our supplement list for doctor review works as a starting template.

Step 3: Assign an evidence tier

This is the part that saves real money. Sort each product into one of three tiers.

Tier 1: Keep (strong, broadly recommended)

• Folic acid, usually via a prenatal. CDC recommends 400 mcg of folic acid daily for anyone who could become pregnant, starting at least one month before conception.
• A prenatal that covers the basics, including iodine. The American Thyroid Association recommends 150 mcg of iodine daily as potassium iodide when planning a pregnancy, according to NIH's iodine fact sheet.
• Anything your clinician prescribed or specifically recommended for a measured need, such as vitamin D or iron for a documented deficiency.

Tier 2: Keep if it fits your situation

• Nutrients that fill a real dietary gap: B12 for vegans, DHA if you don't eat fish, choline if your prenatal lacks it. Our plant-based nutrient checklist shows how to judge this.
• Condition-specific supplements your clinician supports, such as inositol for some people with PCOS.

Tier 3: Cut first (weak, mixed or no benefit in good trials)

• Men's zinc-and-folate combos taken without a measured deficiency. The large FAZST trial found no improvement in semen quality or live births; see our zinc and sperm health breakdown.
• "Egg quality" and "hormone balance" blends built on animal or lab data, including bee products; our royal jelly evidence check is an example.
• Testosterone boosters and herbal performance blends, which target the wrong outcome and carry quality risks.
• Duplicates. A second multivitamin, a separate folate on top of a prenatal, or the same antioxidant in two products.

For ingredient-by-ingredient ratings, see our 22 supplements ranked by evidence, and our honest answer to whether fertility supplements work. conceiveguide.com's supplement evidence review covers the same question from the treatment side.

Step 4: Cut in this order

1. Duplicates. Same nutrient, two bottles. This is free money and often lowers your risk of exceeding upper limits (vitamin A and zinc are common culprits).
2. Tier 3 products with the highest cost per day. Expensive and weakly supported is the easiest call.
3. Tier 3 products with the most ingredients. Big blends make it hard to know what you're taking and harder to read lab results.
4. Tier 2 products that don't match a gap you actually have.
5. Never cut Tier 1 without your clinician. Especially not folic acid while you're trying.

When cheaper isn't better

Cost per day is a tool, not the only test. Once you've decided a product stays, a few things are worth paying for:

• Independent testing. A seal from a third-party program such as USP or NSF means someone outside the company checked the product, which matters most for blends and herbal products.
• The right form and amount. A cheaper prenatal that lacks iodine or choline isn't a saving if you then buy them separately.
• A dose you'll actually take. If a large tablet makes you nauseous and you skip days, a slightly pricier format you tolerate is better value.
• Freshness. Bulk sizes only save money if you finish them before the expiration date, and omega-3 oils in particular can go stale.

Re-run the numbers every three months

Stacks creep. A new bottle gets added after a podcast, a partner starts something, a clinician adds vitamin D. Set a reminder to redo the worksheet every three months, which also lines up with the roughly three-month cycle of sperm development and is a natural point to review progress with your clinician.

Step 5: Put the savings somewhere useful

Money cut from weak supplements can go further elsewhere: a semen analysis, an earlier appointment, or simply a TTC budget with less pressure on it. howtohaveababy.com's TTC financial planning guide and fertilestart.com's TTC money talk can help you plan the bigger picture together.

Common mistakes when pricing a stack

• Counting capsules instead of servings.
• Forgetting the partner's bottles.
• Ignoring "small" items like gummies, teas and powders that add up.
• Comparing bulk-size prices with small-bottle prices without converting to cost per day.
• Keeping a product because you've already paid for a big supply. Unused is cheaper than unhelpful.

Supplements don't treat infertility. The point of this exercise is to keep what has real support and stop paying for what doesn't. Review your final list with your clinician, and if you've been trying for 12 months (or 6 months at 35 or older), ASRM recommends a full evaluation for both partners.

Sources

• CDC. About folic acid (last reviewed September 18, 2026). cdc.gov
• NIH Office of Dietary Supplements. Iodine: fact sheet for health professionals. ods.od.nih.gov
• Schisterman EF, et al. Effect of folic acid and zinc supplementation in men on semen quality and live birth among couples undergoing infertility treatment. JAMA. 2020;323(1):35–48. PubMed 31910279
• ASRM Practice Committee. Definition of infertility: a committee opinion (2023). asrm.org (PDF)