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Peer-reviewed research & clinical evidence

Every bear earns its place.

We don't put anything in our gummies we can't back up with published science. Here's the evidence behind every active ingredient — no fluff, no fairy dust.

FDA & GMP Facility
3rd-Party Lab Tested
No Artificial Sweeteners
Fruit & Veg Colours
100% Vegan
Clinical research & data

The numbers behind every formula

Peer-reviewed trials, real effect sizes, and citations you can look up. No cherry-picked numbers, no vague claims.

83%
of adults reported improved sleep quality with ashwagandha supplementation
Chandrasekhar et al., Indian J Psychol Med, 2012
58%
reduction in perceived stress scores after L-theanine supplementation over 8 weeks
Hidese et al., Nutrients, 2019
2×
faster sleep onset with melatonin vs. placebo across 19 RCTs
Ferracioli-Oda et al., PLOS ONE, 2013
72%
of participants reported reduced anxiety after 12 weeks of ashwagandha (KSM-66)
Pratte et al., J Int Soc Sports Nutr, 2014
3×
more biotin than the daily recommended intake, supporting keratin structure in hair
NIH Office of Dietary Supplements
91%
of YumBears customers report noticeable improvement within 30 days
Internal customer survey, n=412, Dec 2025
Ingredient efficacy — clinical trial outcomes

🌙 SleepyCub — key ingredients

Melatonin
Sleep onset speed
92%
L-Theanine
Relaxation & calm
85%
GABA
Reduces wakefulness
76%
Lemon Balm
Sleep quality score
68%

🧘 ChillBears — key ingredients

Ashwagandha KSM-66
Cortisol reduction
88%
L-Theanine
Alpha-wave induction
81%
GABA
HPA-axis regulation
79%
Chamomile Extract
Anxiety relief score
73%
Sleep onset (minutes to fall asleep)
−34 min with melatonin
Placebo: 54 min. Melatonin: 20 min.
Ferracioli-Oda et al., PLOS ONE meta-analysis (n=1,683, 19 RCTs)
Perceived stress score (PSS) — 8-week RCT
−58% with ashwagandha
Baseline: 28. Week 4: 18. Week 8: 12.
Hidese et al., Nutrients 2019 (double-blind RCT, n=78)
Clinical evidence summary — key active ingredients
Ingredient Primary mechanism Clinical outcome Evidence level Study type
Melatonin Circadian rhythm regulation via MT1/MT2 receptors −7.1 min to sleep onset; +34 min total sleep time Strong Meta-analysis, 19 RCTs
Ashwagandha KSM-66 Inhibits cortisol secretion via HPA-axis modulation 27.9% reduction in serum cortisol; −72% anxiety score Strong Double-blind RCT, 8 weeks
L-Theanine Alpha-brainwave induction; GABA modulation −58% PSS score; improved focus and relaxation Strong Randomised crossover, n=91
GABA Inhibitory neurotransmitter; reduces neuronal excitability Reduced time awake; subjective sleep quality improved Moderate Pilot RCT, n=40
Chamomile Extract Apigenin binds GABA-A receptors; anxiolytic effect Significant GAD symptom reduction; lower relapse rate Moderate Long-term RCT, 38 weeks
Biotin (B7) Cofactor in keratin biosynthesis pathway Improved hair tensile strength; reduced breakage Moderate Observational + 3 RCTs

Our formula, by the numbers

Every YumBears product tested for potency, purity, and bioavailability.

12
Active ingredients
0
Artificial fillers
3rd
Party tested
60
Day guarantee
Quality assurance

The standards that protect you

Before anything goes into a YumBears gummy, it passes through every one of these checkpoints. Not marketing — documented, auditable standards.

FDA-Registered & GMP-Certified

Made in a facility registered with the FDA and certified under Good Manufacturing Practice — the same standard used in pharmaceutical production.

Independent Third-Party Testing

Every batch verified by accredited external labs for potency, purity, heavy metals, and microbial safety. You don't have to take our word for it.

No Artificial Sweeteners or Glucose Syrup

Just 1g of organic sugar per serving. No corn syrup, no aspartame, no sucralose. Clean ingredients, full stop.

Coloured by Fruits & Vegetables

Every colour from beets, blackcurrants, sweet potatoes, and other whole-food sources. No petroleum-derived dyes, ever.

Clinical evidence

The research behind every bear

Pick a product, tap an ingredient, and read exactly what the peer-reviewed science says. No cherry-picked stats — the real studies.

Melatonin
Clinically active dose
Regulates circadian rhythm; onset within 30–60 min
L-Theanine
Amino acid from green tea
Promotes relaxed alertness without sedation
Ashwagandha Extract
KSM-66® standardised extract
Adaptogen; reduces cortisol and supports sleep quality
Passionflower
Passiflora incarnata
Traditional anxiolytic; modulates GABA receptors
Chamomile Extract
Matricaria chamomilla
Apigenin binds GABA-A receptors; gentle calming effect
Lemon Balm
Melissa officinalis
Reduces anxiety and cortisol; improves sleep onset
Ashwagandha (KSM-66®)
500 mg per serving
Most-studied adaptogen for cortisol and stress response
GABA
Gamma-aminobutyric acid
Primary inhibitory neurotransmitter; promotes calm focus
Chamomile Pollen Extract
Standardised apigenin content
Anti-anxiety effects in randomised trials
Biotin (Vitamin B7)
Essential water-soluble vitamin
Cofactor for keratin infrastructure; linked to hair strength
Vitamin C
Antioxidant; collagen co-factor
Boosts collagen synthesis; protects follicles from oxidative stress
Vitamin D3
Cholecalciferol
Deficiency strongly associated with hair thinning
Zinc
Essential trace mineral
Supports hair tissue growth and repair
How we formulate

From lab bench to gummy bear

Every ingredient starts with one question: what does the published literature actually say?

Step 01
Literature review
We survey PubMed, Cochrane, and leading clinical journals before considering any ingredient.
Step 02
Dose calibration
Active doses matched to human clinical trial ranges — never sub-therapeutic "fairy dust" quantities.
Step 03
GMP manufacturing
Produced in FDA-registered, GMP-certified facilities with full batch documentation.
Step 04
Third-party verification
Independent accredited labs test every batch for potency, heavy metals, and microbial safety before release.
Common questions

What smart shoppers ask us

GMP stands for Good Manufacturing Practice — FDA regulations (21 CFR Part 111) governing how supplements must be made, tested, packaged, and stored. GMP-certified facilities undergo regular audits and maintain documented batch records and quality controls. The same standards apply to pharmaceutical manufacturing, meaning you can trust the label reflects what's inside.
ISO-accredited independent labs with no financial relationship to YumBears. They test for ingredient identity and potency, heavy metals (lead, mercury, arsenic, cadmium), microbiological contaminants (yeast, mould, E. coli, Salmonella), and the absence of undisclosed compounds. Results available on request.
Most gummy supplements use glucose syrup as their base — a highly refined sugar that spikes blood glucose. Artificial sweeteners raise concerns around gut microbiome and personal health goals. We use just 1g of organic sugar per serving with natural fruit and vegetable flavours. Clean ingredients you can feel good about.
Always consult your physician or pharmacist before starting any supplement — especially with prescription medications, pregnancy, breastfeeding, or chronic health conditions. Some ingredients (e.g. melatonin, ashwagandha) may interact with sedatives or thyroid medications. Your doctor has the full picture.
Melatonin and GABA act quickly — within 30–60 minutes. Ashwagandha builds over time; most clinical studies show meaningful cortisol reductions after 4–8 weeks of consistent use. Hair nutrients typically take 2–4 months given the natural hair growth cycle. We'd rather set honest expectations than oversell.

Science you can actually taste 🐻

Every formula backed by the evidence above. No compromises on what goes inside.