Nutritional Frontiers Sleep Time Review: Ingredients & Price
By Candid Wellness Reviews Editorial · November 2, 2026
Sleep Time is a real, long-running capsule supplement from Nutritional Frontiers, a Pittsburgh company that sells mainly through health practitioners. Each 2-capsule serving lists 3 mg of melatonin plus 5-HTP, GABA, glycine, taurine, L-theanine and vitamins B6 and B5, with every amount disclosed. Public reviews lean positive but are few, and some people say it did nothing for them. Because it combines melatonin with 5-HTP, people over 60 who take prescription medicines should check with a pharmacist first.
We have not tested this product ourselves. This review is based on the maker's published information, public customer reviews and independent health sources. We do not earn a commission from this brand. Not medical advice.
If you searched "Nutritional Frontiers Sleep Time reviews," you probably found mostly store listings. Sleep Time is sold mainly through health practitioners and small online shops. We read the maker's pages, several retailer listings, the public reviews we could open, and what NIH says about each ingredient. Everything below was checked on November 2, 2026.
What is Nutritional Frontiers Sleep Time, and who makes it?
Sleep Time is a capsule supplement meant to be taken before bed. It's made by Nutritional Frontiers, LLC, which lists its address as 750 Holiday Drive, Suite 440, Pittsburgh, PA 15220. Its website says it began in 2008 and serves mainly health practitioners and their patients; the shop asks you to log in before buying.
The maker describes Sleep Time as "formulated to help support the neurotransmitters dopamine and serotonin, which have a role with sleep cycles and anxiety." Some stores call it "Sleep Time New Formula," and two 2019 reviews and one 2023 review mention a formula change, so older reviews may describe an earlier version. If your bottle differs from what's below, go by your label.
What's in Sleep Time?
Here is the full Supplement Facts panel as published on nutritionalfrontiers.com (Sleep Time 60 ct. and 120 ct. pages). Professional Supplement Center's listing shows the same amounts. One serving is 2 capsules; a 60-capsule bottle holds 30 servings. Other ingredients: hypromellose (capsule), rice flour and vegetable stearate.
| Ingredient (per 2 capsules) | Amount | What it is | What independent sources say |
|---|---|---|---|
| Melatonin | 3 mg | A hormone your body makes to run its sleep-wake cycle | NIH's NCCIH says short-term use appears safe for most people, long-term safety data are lacking, and melatonin may stay active longer in older people and cause daytime drowsiness. |
| 5-HTP (from Griffonia simplicifolia seed extract) | 50 mg | A compound the body uses to make serotonin | NCCIH says data on 5-HTP for sleep are very limited. It has been watched closely because of its link to L-tryptophan and a 1989 illness outbreak; tests have not found similar contaminants. |
| GABA (gamma-aminobutyric acid) | 500 mg | A calming chemical messenger in the brain | We did not find an NIH consumer fact sheet on GABA supplements for sleep. |
| Glycine | 500 mg | An amino acid | We did not find an NIH consumer fact sheet on glycine supplements for sleep. |
| Taurine | 250 mg | An amino acid | We did not find an NIH consumer fact sheet on taurine supplements for sleep. |
| L-theanine (as Suntheanine®) | 100 mg | An amino acid found in tea | A 2024 review in the American Journal of Lifestyle Medicine (hosted by NIH's PubMed Central) called L-theanine less supported than melatonin or magnesium for sleep. The trial it described used 200 mg. |
| Vitamin B6 (as pyridoxal-5-phosphate) | 10 mg | A B vitamin | NIH's Office of Dietary Supplements lists an adult upper limit of 100 mg a day from all sources and notes Europe's food safety agency set a lower limit of 12 mg in 2023. High amounts for a year or longer can damage nerves. |
| Pantothenic acid (vitamin B5, as calcium-D-pantothenate) | 10 mg | A B vitamin | The Office of Dietary Supplements calls it safe even at high doses; very high amounts (such as 10,000 mg a day) can upset the stomach. It is not known to interact with medicines. |
One thing we like: every amount is spelled out, with no "proprietary blend" hiding the doses from you or your pharmacist.
How does its melatonin dose compare?
Sleep Time lists 3 mg of melatonin per 2-capsule serving. For context, the 2017 American Academy of Sleep Medicine guideline based its melatonin advice on trials of 2 mg prolonged-release melatonin in adults over 55, and it suggested doctors not use melatonin for long-lasting trouble falling or staying asleep. NCCIH also notes that melatonin may linger longer in older adults. So Sleep Time's serving is about 1.5 times the 2 mg used in those trials, with 5-HTP and amino acids on top. By comparison, the YU Sleep formula we reviewed earlier lists 0.9 mg.
For more, read Melatonin for People Over 60: What the Research Says and our best sleep aid guide. Whatever you choose, follow the label and ask a pharmacist.
Where can you buy it, and what does it cost?
Prices below are as listed on each site on Nov 2, 2026:
- nutritionalfrontiers.com (the maker): $39.50 for 60 capsules, $69.50 for 120 capsules, with a 5% "Subscribe & Save" option. The site shows a "Login to Shop" button. Shipping is a flat $12.50 on orders under $250 and free at $250 or more.
- Professional Supplement Center: $39.99 for 60 veg capsules, $69.99 for 120. Free standard U.S. shipping on orders of $35 or more. The listing says this product does not ship to California.
- Pine Street Clinic ($39.99 / $69.99) and Nutriessential ($39.50 / $69.50) list the same two sizes.
- Fullscript (an online dispensary practitioners use) lists Sleep Time, including a separate "California Only" version with the same ingredient amounts. Prices there require an account.
That's roughly $1.16 to $1.33 per 2-capsule serving before shipping.
What is the return policy?
The maker's Shipping & Returns page is stricter than many shoppers expect. You must request an authorized return within 30 days of receipt, ship it back at your own expense within 5 business days of approval, and the product must be in original condition with seals in place and at least 10 months of shelf life left. "All refunds will be issued a credit memo to be used for future purchases," and "a 20% restocking fee will apply." Discounted products can't be returned. In plain terms: store credit, not cash, and opened bottles don't qualify.
Professional Supplement Center's listing shows a "30-Day Return Policy"; read its terms before opening a bottle.
What do real customers say?
We found two places with public reviews we could read:
- Professional Supplement Center: 4.1 out of 5 stars from 29 reviews (19 five-star, 4 four-star, 1 three-star, 0 two-star, 5 one-star), with 79% saying they would recommend it. Checked Nov 2, 2026. The reviews go back to 2015; 14 of the 29 are dated before October 2019, when reviewers first mention a formula change, so they may describe the earlier version. One 5-star review is about the store's service rather than the product.
- nutritionalfrontiers.com: the 120-capsule page shows 6 reviews, all 5 stars, dated May 2024 to April 2025; the 60-capsule page shows none. Checked Nov 2, 2026. Keep in mind that reviews on a brand's own site are a small sample the brand controls.
What comes up again and again: Happy reviewers most often mention falling asleep sooner or getting back to sleep after waking during the night. Several say they take it only now and then rather than nightly. A reviewer on the maker's site (January 2025, 5 stars) wrote that they credit it "with helping me get back to sleep quickly."
The other side: Four of the five 1-star reviews on Professional Supplement Center say it didn't help or kept the person awake; the fifth objects to the formula change. "This product was not effective for me," wrote a reviewer on Professional Supplement Center (June 2019). An anonymous reviewer who received a sample wrote, "It kept me awake!" (January 2024). Grogginess comes up too, even in positive reviews: one 5-star reviewer said it "tends to make him groggy the next morning" (a reviewer on Professional Supplement Center, August 2018, writing about her husband). And two 2019 reviewers were unhappy about the formula change.
That's a modest number of reviews in total, so read them as a rough signal, not proof either way.
Who should skip it or talk to a doctor first?
- People taking antidepressants or other serotonin-affecting medicines. The warning on Professional Supplement Center's copy of the label says 5-HTP should not be taken with prescription antidepressants unless a practitioner directs it. MedlinePlus explains that serotonin syndrome, a potentially life-threatening reaction, most often happens when two or more drugs that affect serotonin are taken together.
- People on blood thinners or with epilepsy. NCCIH says they should take melatonin only under medical supervision.
- Pregnant or breastfeeding women, and teens. The retailer's label copy says the product should not be taken by adolescents or pregnant or lactating women. NCCIH notes there's been little research on melatonin in pregnancy and breastfeeding.
- People taking cortisone or with kidney disease, both named in the same label warning.
- Anyone who needs to drive or stay alert. The label says not to drive or operate machinery when taking melatonin.
- People already taking a B-complex or multivitamin. Add up your vitamin B6 from all products and show the total to your pharmacist.
If your sleep trouble has lasted weeks or months, see a doctor; it could be something like sleep apnea.
Our take
Sleep Time is a legitimate product from an established practitioner brand, and its label is unusually clear: every ingredient and amount is listed. Public reviews lean positive, but they're few, and some buyers said it did nothing or left them groggy. For readers over 60, two details matter most. The 3 mg of melatonin is higher than the 2 mg studied in older adults, and the 5-HTP makes a pharmacist check important if you take antidepressants or other prescriptions. And the maker's return policy gives store credit minus a 20% restocking fee, not cash back. If your pharmacist says it's fine for you, it's a reasonable, clearly labeled option.
This review is for general information only and is not medical advice. Talk to your doctor or pharmacist before starting any supplement, especially if you take other medicines.
Frequently Asked Questions
Who makes Sleep Time?
Nutritional Frontiers, LLC, which lists its address as 750 Holiday Drive, Suite 440, Pittsburgh, PA 15220. Its website says the company began in 2008 and is set up mainly for health practitioners and their patients, with separate practitioner and patient logins.
How much melatonin is in Nutritional Frontiers Sleep Time?
The maker's Supplement Facts list 3 mg of melatonin per serving of 2 capsules. For comparison, the trials of adults over 55 reviewed by the American Academy of Sleep Medicine in 2017 used 2 mg. Follow the label and ask a pharmacist what makes sense for you.
How much does Sleep Time cost?
As listed on Nov 2, 2026: $39.50 for 60 capsules and $69.50 for 120 capsules on nutritionalfrontiers.com (the site asks you to log in to shop, and shipping is a flat $12.50 on orders under $250). Professional Supplement Center listed $39.99 and $69.99, with free U.S. standard shipping on orders of $35 or more. A 60-capsule bottle is 30 servings.
Can I return Sleep Time if it doesn't work for me?
The maker's posted policy allows returns requested within 30 days of receipt, but only for products in original, sealed condition with at least 10 months of shelf life left. Refunds are issued as a credit memo for future purchases, a 20% restocking fee applies, and you pay return shipping. Professional Supplement Center's listing shows a 30-day return policy; read its terms before you open the bottle.
Is Sleep Time safe with my medications?
We can't answer that for you, and neither can a label. Sleep Time contains melatonin and 5-HTP. NIH's NCCIH says people with epilepsy and people taking blood thinners should take melatonin only under medical supervision, and a retailer's copy of the label warns against combining 5-HTP with prescription antidepressants unless a practitioner directs it. Bring the bottle to your pharmacist.
What do customers say about Sleep Time?
On Professional Supplement Center (checked Nov 2, 2026), 19 of 29 reviews gave 5 stars and 5 gave 1 star. Positive reviews often mention falling asleep or getting back to sleep after waking at night. Most of the 1-star reviews say it did not work or kept the person awake, one (October 2019) objects to a formula change, and two reviewers mention next-morning grogginess.