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Proper Sleep Review 2026: Now Sonnet. Ingredients, Price, Refunds

By Candid Wellness Reviews Editorial · November 2, 2026

Proper's sleep capsules (Core Sleep, Sleep + Calm and Sleep + Restore) appear to be sold now under the name Sonnet: Proper's old website, getproper.com, sends visitors to takesonnet.com. The labels are clear and every amount is listed, but independent research on the main ingredients is mixed or limited, and most of the high ratings sit on the company's own site. It costs $39.99 for 30 nights ($35.99 with a subscription) and comes with a 30-day refund policy. Check with your pharmacist first, because ashwagandha, valerian and melatonin can interact with some medicines.

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 try to visit Proper's website today, you end up somewhere else. This review covers Proper's sleep capsule line (Core Sleep, Sleep + Calm and Sleep + Restore), which now appears to be sold under the name Sonnet. Everything below was checked on November 2, 2026.

What is Proper Sleep, and who makes it now?

Proper launched as a sleep brand that paired capsules with sleep coaching. As of November 2, 2026, its old web address, getproper.com, sends visitors to takesonnet.com, and old product links (like /products/core-sleep) land on the matching Sonnet product pages. The Sonnet store sells three formulas with the same names and ingredients that older Proper reviews describe, and its own review summary still mentions "Proper Core Sleep." The labels say the capsules are made in a cGMP-certified facility for Holistic Health Holdings LLC.

Older articles, such as a 2021 Sleepline review, also mention Sleep + Immunity and Sleep + Clarity. We did not see those for sale on the Sonnet site.

What's in each formula?

Each serving is 2 vegetable capsules, and each container holds 30 servings. Here is what the maker's Supplement Facts labels list (Core Sleep label, Sleep + Calm label, Sleep + Restore label):

Other ingredients on all three labels: vegetable cellulose capsule and organic rice hulls, plus less than 2% ascorbyl palmitate and calcium silicate. We like that every amount is printed instead of hidden in a "proprietary blend."

What does the research say about these ingredients?

In short, it's mixed. NCCIH notes that the American Academy of Sleep Medicine's 2017 guidelines advised against valerian for long-lasting sleep problems in adults. For GABA, the 2020 review's authors said more studies are needed. The Venetron research we found is small, and the 2015 study came from authors at a Japanese supplement company (Pharma Foods International). In that study, GABA shortened the time to fall asleep by 5.3 minutes and the leaf extract raised non-REM sleep time by 7.6%. Those are modest numbers, and the abstract does not say how many people took part.

The company's site reports its own numbers, too. In its words: "84% Of Sonnet Users Report Better Sleep," and "79% of Sonnet customers had less frequent issues staying asleep." The site says the second figure is based on 75 customers who filled out its sleep surveys. These statements have not been evaluated by the FDA. They come from the company's own customers, not from an independent, placebo-controlled trial, and we did not find a published trial of these exact formulas.

One more note: the product pages say the capsules are "Produced in a FDA-approved facility." The FDA says it does not approve dietary supplements, and that supplement facilities register with the FDA. The company's own FAQ uses the more accurate words "FDA-registered."

How does the melatonin dose compare to other options?

Core Sleep and Sleep + Calm have no melatonin at all. Sleep + Restore has 3 mg, with 1 mg in a slow-release form. For comparison, the trials in adults over 55 behind the American Academy of Sleep Medicine's 2017 guideline used 2 mg, and in Europe a 2 mg prolonged-release melatonin tablet (Circadin) is a prescription medicine for people 55 and older. The YU Sleep drops we reviewed list 0.9 mg. NCCIH also notes that a 2017 test of 31 melatonin supplements found most labels did not match what was inside.

If you are over 60 and weighing melatonin, read our guide to melatonin for people over 60, and see our best sleep aid guide for how melatonin and non-melatonin blends differ. We don't suggest any dose here: follow the label and ask a pharmacist.

How much does it cost?

As listed on takesonnet.com on Nov 2, 2026:

• One-time purchase: $39.99 for 30 servings (bottle or refill pouch), for any of the three formulas.
• Subscription: $35.99 per delivery (10% off), shipped every 30 or 60 days. The first subscription box includes a reusable glass jar; refills come in pouches.
• Shipping: the FAQ says one-time orders pay a $5 flat rate and subscribers ship free. The site banner says free shipping on orders over $50.

That works out to about $1.33 a night one-time, or about $1.20 a night on subscription. The FAQ says subscriptions charge your card every 30 days, and you can skip, swap or cancel from your account (Subscriptions, then Edit, then Cancel) or by emailing care@takesonnet.com.

What is the refund policy?

The company's refund policy page says that if you are not satisfied, you can email care@takesonnet.com within 30 days for a full refund, "no questions asked and no need to ship anything back to us." The FAQ adds that the 30 days count from your delivery, and that anything bought in a store has to go back to that store. Keep your order confirmation.

What do real customers say?

Most of the reviews we could find live on the company's own website, which chooses how they are shown. On Nov 2, 2026, the Core Sleep page showed about 4.6 out of 5 from 217 reviews, the Sleep + Calm page showed about 4.8 out of 5 from 258 reviews, and the home page listed 244 reviews for Sleep + Restore (we could not load that page to see its average). Common praise in the reviews shown: falling asleep more easily, getting back to sleep after waking, and not feeling groggy the next morning. Less happy reviews say the effect faded over time or that it simply didn't work. A reviewer on the maker's site (November 2022, 4 stars, Core Sleep) wrote: "After taking this for a few days it started working well but as time went on it’s not as effective."

Independent reviews were hard to find. Trustpilot's page for getproper.com showed a TrustScore of 3.1 from just 2 reviews on Nov 2, 2026, both from 2023 and none in the past 12 months. Both described trouble with orders and with reaching customer service. Two reviews are far too few to judge a company. We did not find a Trustpilot page for takesonnet.com. We could not open a current Amazon listing, so we have left Amazon ratings out.

Who should skip it or talk to a doctor first?

The company says the formulas are for adults 18 and older, and asks pregnant or nursing women to check with a doctor. Its FAQ also says the formulas are safe to take with other supplements. NIH sources are more cautious about the individual ingredients:

• Pregnant or breastfeeding: NCCIH says ashwagandha should be avoided, and little is known about valerian or melatonin safety in pregnancy.
• Thyroid or autoimmune conditions, or surgery coming up: NCCIH says ashwagandha is not recommended.
• Hormone-sensitive prostate cancer: NCCIH says to avoid ashwagandha.
• Certain medicines: ashwagandha might interact with medicines for diabetes, high blood pressure, thyroid conditions and seizures, plus immunosuppressants and sedatives. Valerian should not be combined with alcohol or sedatives.
• Sleep + Restore only: people with epilepsy or on blood thinners need medical supervision with melatonin, and the American Academy of Sleep Medicine's 2015 guidelines advise against melatonin for people with dementia.
• Liver concerns: rare liver injury has been linked to ashwagandha and to valerian (most often with other herbs).

Bring the label to your pharmacist. If poor sleep has lasted for weeks, talk with your doctor.

Our take: is Proper Sleep worth trying?

There are real positives here. The labels are clear, every amount is listed, there are melatonin-free choices, and the 30-day refund policy doesn't ask you to mail anything back. On the other side, the research on the main ingredients is mixed or limited, the strongest numbers come from the company's own surveys, and independent customer feedback is very thin, with the two Trustpilot reviews both describing service problems. At about $40 a month, it costs more than many single-ingredient options.

If you've already worked on the basics (a steady bedtime, less caffeine late in the day, a dark, cool room) and your doctor or pharmacist says these ingredients are fine with your medicines, a single one-time bottle within the refund window is a lower-risk way to try it than starting a subscription. If you take several prescriptions, are pregnant, or have thyroid or liver concerns, this is one to discuss before you buy.

This is not medical advice. Talk to a doctor or pharmacist before starting any new supplement, especially if you take other medicines.