MAV Nutrition Night Time Fat Burner Capsules Review 2026: Misleading Claims
Skip this one. — Misleading
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"Formulated with melatonin, valerian, and lemon balm for relaxation"
These ingredients have real, moderate evidence for helping with sleep onset and calm.
Examine.com melatonin and valerian summaries -
"Night Time Fat Burner 'shreds fat overnight'"
The only well-dosed active ingredient is melatonin, a sleep aid with no proven fat-burning effect.
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"Green coffee bean extract supports weight loss"
The famous study behind this claim was retracted for fabricated data, and the FTC sued the marketers who used it.
FTC v. Applied Food Sciences, 2014 -
"White kidney bean extract blocks carbs and curbs cravings"
Six ingredients share one 500mg blend, so the actual white kidney bean dose is far below the roughly 1,500mg used in supportive trials.
Consumer advice
If you want a sleep aid, buy melatonin or valerian root separately for a few dollars — you'll know exactly what dose you're getting. Don't expect this to burn meaningful fat overnight; white kidney bean and green coffee bean extract have weak, inconsistent evidence for weight loss even at full clinical doses, and here they're hidden in an undisclosed blend. If you take other melatonin products or sleep medication, watch out for overlapping doses.
Claims vs Evidence
AGGRESSIVE4 claims assessed. These grades assess the marketing claims, not the whole product. See each explanation for the evidence and its limits.
"Sleep well while you shred fat"
Unsupported
No evidence a sleep capsule meaningfully burns fat overnight
Based on: Melatonin, White Kidney Bean
Source: Internal: label vs marketing claim
"Appetite suppressant & carb blocker (White Kidney Bean)"
Stretch
Some studies show modest effect, but dose here is unknown/hidden
Based on: Kidney Bean Seed Extract
Source: Examine.com white kidney bean summary
"Boost metabolism overnight"
Unsupported
No clinical proof melatonin or this blend raises metabolic rate
Based on: Green Coffee Bean Extract, Melatonin
Source: Internal: ingredient vs claim mismatch
"Supports relaxation without crashes or jitters"
Partial
These ingredients are reasonably supported for relaxation/sleep onset
Based on: L-Theanine, L-Tryptophan, Valerian, Lemon Balm, Melatonin
Source: Examine.com melatonin & valerian summaries
1 partial · 1 stretch · 2 unsupported
Signals
- Makes aggressive marketing claims
Ingredients
Based on peer-reviewed research from PubMed and Examine.com
Why the chain breaks for this product
Most ingredients below have real research behind them. The problem isn't the ingredients — it's the doses. 13 of 14 are hidden in proprietary blends or not disclosed on the label, so the product can claim the benefits without delivering the chain that gets you there.
Vitamin D (as Cholecalciferol)
Essential fat-soluble vitamin. Supports bone health, immune function, and may improve exercise tolerance in deficient individuals.
Research-backed dose: 400–80,000 IU daily depending on condition and deficiency status
In this product: 1200 IU (30mcg)
Kidney Bean (Phaseolus vulgaris) Seed Extract
Starch-blocking extract shown in multiple trials to modestly reduce body weight and fat mass.
Research-backed dose: 700-3000 mg daily (split before meals)
In this product: Dose not disclosed
L-Theanine
Amino acid from green tea. Best evidence supports improved focus and reduced caffeine jitteriness when combined with caffeine.
Research-backed dose: 200 mg daily (alone); 200 mg paired with 160-200 mg caffeine for attention/focus
In this product: Dose not disclosed
Essential amino acid that may help regulate appetite and blood sugar when combined with other nutrients.
Research-backed dose: 500mg-2g for sleep support in studies
In this product: Dose not disclosed
Valerian (Valeriana officinalis) Root Extract
Herbal sleep aid with clinical evidence for improving sleep quality and reducing anxiety-related brain activity.
Research-backed dose: 530–1060 mg daily based on study doses
In this product: Dose not disclosed
Herbal extract with early evidence for stress relief, mood support, and blood sugar control in type 2 diabetes.
Research-backed dose: 300-700 mg daily based on study doses
In this product: Dose not disclosed
Melatonin
Natural sleep hormone. Clinically shown to improve sleep quality and reduce some inflammation-related symptoms.
Research-backed dose: 0.3–10 mg daily depending on use case
In this product: Dose not disclosed
Rest and Reset Blend
Broccoli leaf extract shows early promise for liver health and metabolism, but human trial data is lacking.
Research-backed dose: not applicable - blend total
In this product: Dose not disclosed
Hypromellose (Capsule)
Encapsulated chili pepper extract. May modestly support fat breakdown, but weight loss evidence is limited.
Research-backed dose: 2-10 mg daily based on study doses
In this product: Dose not disclosed
Starch-blocking extract shown in multiple trials to modestly reduce body weight and fat mass.
Research-backed dose: 700-3000 mg daily (split before meals)
In this product: Dose not disclosed
Plant extract marketed to block carb absorption. Limited verified research; mostly marketing claims.
Unroasted coffee extract. Modest evidence for lowering blood pressure, blood sugar, and supporting weight loss.
Research-backed dose: 400-1000 mg daily based on study doses
In this product: Dose not disclosed
Herbal sleep aid with clinical evidence for improving sleep quality and reducing anxiety-related brain activity.
Research-backed dose: 530–1060 mg daily based on study doses
In this product: Dose not disclosed
Herbal extract with modest evidence for reducing anxiety and stress. Sleep and cognitive benefits are mixed.
Research-backed dose: 300-700 mg daily based on study doses
In this product: Dose not disclosed
Safety & side effects
What NIH says about the ingredients in this product. This describes the ingredients, not tests of this product, and it is not medical advice. Ask a doctor or pharmacist first if you take medication, are pregnant or nursing, or have a health condition.
Vitamin D
Vitamin D toxicity is almost always caused by excessive supplement intake. It can raise blood calcium and, in extreme cases, lead to kidney failure and death. The adult upper limit is 100 mcg (4,000 IU) a day.
Possible side effects
- High blood calcium from vitamin D toxicity can lead to nausea, vomiting, muscle weakness, and other symptoms.
Serious risks
- Toxicity can cause high blood and urine calcium. In extreme cases it may lead to kidney failure, soft tissue calcification, heart rhythm problems, and death.
- Toxicity is almost always caused by taking too much vitamin D through supplements.
Avoid or ask a doctor first if
- The source says people on regular medications should talk with their health care providers about vitamin D intake and status.
Medication interactions
- Vitamin D supplements may interact with orlistat, statins, steroids, and thiazide diuretics.
- Taking calcium supplements with vitamin D supplements may raise the risk of certain adverse effects.
Upper limit: 100 mcg a day for adults 19+. This label lists 1200 IU (30mcg).
Source: NIH Office of Dietary Supplements, Vitamin D: Fact Sheet for Health Professionals
Melatonin
Short-term use of melatonin supplements appears to be safe for most people, but there isn't enough information on side effects at higher doses, and long-term safety information is lacking. The source flags extra concerns for children, including accidental ingestion and overdose.
Possible side effects
- Side effects reported in short-term adult studies included headache, dizziness, nausea, and sleepiness.
- In children, reported side effects have included drowsiness, more bedwetting or evening urination, headache, dizziness, and agitation.
- Melatonin may stay active longer in older people and cause daytime drowsiness.
Serious risks
- Over-the-counter melatonin might put children and teenagers at risk for accidental or intentional overdose.
- In poison control data on people 19 and younger, five people needed mechanical ventilation and two children under 2 died. The data did not show whether melatonin overdose or another cause led to the deaths.
- Melatonin supplements could affect hormonal development in children, including puberty, menstrual cycles, and prolactin overproduction. The source says this isn't known for sure.
- There may be a risk of allergic reactions to melatonin supplements.
- Some melatonin products may not contain what the label says. In one study, 26 percent of supplements contained serotonin.
Avoid or ask a doctor first if
- The 2015 American Academy of Sleep Medicine guidelines recommend against melatonin use by people with dementia.
- Parents should speak with a health care provider before giving children melatonin.
- Research on melatonin safety in pregnant or breastfeeding women has been lacking.
Medication interactions
- People who take medicine should consult their health care providers before using melatonin.
- People with epilepsy and those taking blood thinner medications need medical supervision when taking melatonin supplements.
Price & Value
ModerateMAV Nutrition Night Time Fat Burner Capsules
$15.59
Nature's Bounty Melatonin + separate white kidney bean extract capsules
~$6-10 for melatonin, ~$8-12 for white kidney bean extract
What you're actually paying for
This is a multi-ingredient blend at $0.26 a serving. Comparable options: A $6 melatonin/valerian sleep aid plus a separate white kidney bean extract supplement.
Worth paying for
- Supports relaxation without crashes or jitters
What's marketing
- Appetite suppressant & carb blocker (White Kidney Bean)
- Night Time Fat Burner 'shreds fat overnight'
- Green coffee bean extract supports weight loss
- White kidney bean extract blocks carbs and curbs cravings
Research sources: PubMed · Examine.com
Analyzed product: https://mavnutrition.com/products/night-time-fat-burner-capsules
Analysis generated: 2026-11-06 · Engine v1.0.0
Frequently Asked Questions
Is MAV Nutrition Night Time Fat Burner Capsules worth the money?
Based on our analysis, MAV Nutrition Night Time Fat Burner Capsules has significant red flags that suggest it may not be worth $15.59. This is essentially a melatonin-based sleep aid with a small amount of white kidney bean extract and green coffee bean extract mixed in, sold as a "fat burner." The relaxation ingredients (melatonin, valerian, lemon balm, L-theanine, L-tryptophan) are legitimate for sleep, but they're bundled into a 500mg proprietary blend with the weight-loss ingredients, so no
Is MAV Nutrition Night Time Fat Burner Capsules a scam?
While we can't definitively call MAV Nutrition Night Time Fat Burner Capsules a scam, our analysis found 1 red flags including questionable marketing claims. Key concerns: Makes aggressive marketing claims
What are the ingredients in MAV Nutrition Night Time Fat Burner Capsules?
MAV Nutrition Night Time Fat Burner Capsules contains 14 ingredients including Vitamin D (as Cholecalciferol), Kidney Bean (Phaseolus vulgaris) Seed Extract, L-Theanine, L-Tryptophan, Valerian (Valeriana officinalis) Root Extract.
Does MAV Nutrition Night Time Fat Burner Capsules actually work?
MAV Nutrition Night Time Fat Burner Capsules's effectiveness is questionable. Most claims (3 of 4) lack support.
Are there cheaper alternatives to MAV Nutrition Night Time Fat Burner Capsules?
Yes, Nature's Bounty Melatonin + separate white kidney bean extract capsules at ~$6-10 for melatonin, ~$8-12 for white kidney bean extract offers similar benefits at a better price point. Many key ingredients in MAV Nutrition Night Time Fat Burner Capsules are available separately for less.
Does MAV Nutrition Night Time Fat Burner Capsules have side effects?
NIH summaries of the ingredients in MAV Nutrition Night Time Fat Burner Capsules note these possible effects. Vitamin D: High blood calcium from vitamin D toxicity can lead to nausea, vomiting, muscle weakness, and other symptoms. Melatonin: Side effects reported in short-term adult studies included headache, dizziness, nausea, and sleepiness. This describes the ingredients, not tests of this product; ask a doctor or pharmacist.