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Lipo6 Black Nighttime Ultra Concentrate

Nutrex Research Black Series
4.5
★ ★ ★ ★ ★
(714 ratings)
Selenium 100 mcg
Chromium 200 mcg
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Score47
Useful chromium and selenium forms cannot rescue an undisclosed nighttime complex. Hidden actives make both effectiveness and safety difficult to judge.
How scoring works
Quantity:30 Black-Cap(s) • (30 servings)
Goals:
Metabolism Boost

Score 47

Useful chromium and selenium forms cannot rescue an undisclosed nighttime complex. Hidden actives make both effectiveness and safety difficult to judge.
How scoring works
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Analysis

Chromium picolinate at 200 mcg and selenium as selenomethionine at 100 mcg are useful, specific forms. Vitamin B6 is also clearly listed, but these nutrients do not establish a strong nighttime weight-loss effect on their own.

The 552 mg sleep and weight-loss complex hides every ingredient and individual amount. That omission prevents assessment of whether the formula contains meaningful sleep actives, stimulants, sedatives, or conflicting mechanisms.

One capsule is convenient, yet the opaque centerpiece and weak value outweigh the simple serving. Users seeking sleep support or metabolic nutrition can find products with fully disclosed actives and clearer expectations.

Who is it for
  • Adults considering combined nighttime and weight-management support
  • People who prioritize a one-capsule serving over transparency
Best for
  • Nighttime supplement routines
  • Chromium intake
  • Selenium maintenance

Pros

  • Uses chromium picolinate
  • Uses selenomethionine
  • One-capsule serving
  • Lists the total complex weight

Cons

  • Every ingredient in the main complex is hidden
  • No ingredient-level sleep dosing
  • Weak evidence for weight-management effects
  • Poor value

Warnings

  • The undisclosed sleep complex should not be combined with alcohol, sleep aids, or sedating medicines until its complete ingredient list is verified.
  • The nighttime positioning suggests possible drowsiness, so users should avoid driving or operating machinery until they know their response.
  • Chromium may add to the glucose-lowering effect of insulin or sulfonylureas and should be monitored with the prescriber.

Nutrient quality

60 Moderate impact

Selenium and chromium use useful forms and reach meaningful amounts. The opaque nighttime complex prevents assessment of the ingredients most responsible for sleep and weight effects.

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Ingredient transparency

33 Situational impact

Mineral and vitamin amounts are shown, but the main complex hides all component doses. Directions, inactive ingredients, and complex contents are missing.

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Customer satisfaction

63 Moderate impact

The supplied aggregate rating is only moderately favorable. Specific comments are unavailable, so complaint patterns and intended-use fit cannot be verified.

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Value for money

38 Lower impact

Useful mineral forms provide limited value, but the main formula remains opaque. The moderate serving cost is not competitive for an unassessable blend.

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Report analysis

Goals

Metabolism Boost
Impact
Moderate effect
C+ Goal FitC Strength of SupportC CoverageD Formula Quality
Vitamin B6 · 10 mg

Chromium picolinate directly supports insulin action, while selenium contributes to normal thyroid hormone metabolism. Both amounts are clearly listed and use suitable forms.

The main nighttime weight-loss blend is proprietary, so its ingredients, sedative effects, and metabolic doses cannot be judged. The hidden blend prevents confidence that the formula meaningfully supports thermogenesis or fat oxidation beyond the disclosed minerals.

Study evidence
Chromium Supportive 47 studies
Selenium Mixed 28 studies

Ingredients

IngredientAmount per serving
Vitamin B6 (Pyridoxine Hydrochloride)
10 mg
Selenium (Selenomethionine)
100 mcg
Chromium (Chromium Picolinate)
200 mcg
Nighttime Weight Loss & Sleep Support Complex
552 mg
Adults 18–50 Women
Report overview
A- Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyF Value

Selenomethionine provides a well-absorbed organic source, though the label does not confirm its L isomer. The 100 mcg amount suits daily maintenance and leaves a comfortable safety margin. Its very high selenium-specific cost is not offset by substantial broader nutrition.

B- Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyD- Value

Chromium picolinate provides a preferred elemental amount in a highly bioavailable form. The label does not separate compound weight from elemental yield, and the sleep-support blend hides individual ingredient doses. Normalized chromium cost falls in a middle tier without a qualifying disclosed companion active.

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Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Chromium picolinate supplementation in women: effects on body weight, composition, and iron status.
    Lukaski HC; Siders WA; Penland JG · Nutrition (Burbank, Los Angeles County, Calif.) · 2007
    Randomized trial83 participantsWeight Loss forChromium
  2. The Influences of Chromium Supplementation on Metabolic Status in Patients with Type 2 Diabetes Mellitus and Coronary Heart Disease.
    Farrokhian A; Mahmoodian M; Bahmani F; Amirani E; Shafabakhsh R; Asemi Z · Biological trace element research · 2021
    Randomized trial64 participantsWeight Loss forChromium
  3. Effect of L-arginine and selenium added to a hypocaloric diet enriched with legumes on cardiovascular disease risk factors in women with central obesity: a randomized, double-blind, placebo-controlled trial.
    Alizadeh M; Safaeiyan A; Ostadrahimi A; Estakhri R; Daneghian S; Ghaffari A; Gargari BP · Annals of nutrition & metabolism · 2012
    Randomized trial84 participantsWeight Loss forSelenium
  4. The Effects of Zinc and Selenium Supplementation on Body Composition and Thyroid Function in Individuals with Overweight or Obesity: A Systematic Review.
    Zavros A; Giannaki CD; Aphamis G; Roupa Z; Andreou E · Journal of dietary supplements · 2023
    Systematic review13 studies pooledWeight Loss forSelenium
  5. Dietary selenium intake modulates thyroid hormone and energy metabolism in men.
    Hawkes WC; Keim NL · The Journal of nutrition · 2004
    Non-randomized trial11 participantsWeight Loss forSelenium
  6. Elevated intakes of supplemental chromium improve glucose and insulin variables in individuals with type 2 diabetes.
    Anderson RA; Cheng N; Bryden NA; Polansky MM; Cheng N; Chi J; Feng J · Diabetes · 1997
    Randomized trial180 participantsMetabolism Boost forChromium
  7. Chromium Supplementation and the Effects on Metabolic Status in Women with Polycystic Ovary Syndrome: A Randomized, Double-Blind, Placebo-Controlled Trial.
    Jamilian M; Asemi Z · Annals of nutrition & metabolism · 2016
    Randomized trial64 participantsMetabolism Boost forChromium
  8. A Comprehensive insight into the effect of chromium supplementation on oxidative stress indices in diabetes mellitus: A systematic review.
    Kooshki F; Tutunchi H; Vajdi M; Karimi A; Niazkar HR; Shoorei H; Pourghassem Gargari B · Clinical and experimental pharmacology & physiology · 2024
    Systematic review33 studies pooledMetabolism Boost forChromium
  9. Comparison of nutritional supplements in improving glycolipid metabolism and endocrine function in polycystic ovary syndrome: a systematic review and network meta-analysis.
    Hu X; Wang W; Su X; Peng H; Tan Z; Li Y; Huang Y · PeerJ · 2023
    Meta-analysis2,362 participants41 studies pooledMetabolism Boost forChromium Metabolism Boost forSelenium
  10. [Chromium supplementation in patients with type 2 diabetes and high risk of type 2 diabetes: a meta-analysis of randomized controlled trials].
    San Mauro-Martin I; Ruiz-León AM; Camina-Martín MA; Garicano-Vilar E; Collado-Yurrita L; Mateo-Silleras Bd; Redondo Del Río Mde P · Nutricion hospitalaria · 2017
    Meta-analysis13 studies pooledMetabolism Boost forChromium
  11. Effects of selenium supplementation on glucose homeostasis, inflammation, and oxidative stress in gestational diabetes: Randomized, double-blind, placebo-controlled trial.
    Asemi Z; Jamilian M; Mesdaghinia E; Esmaillzadeh A · Nutrition (Burbank, Los Angeles County, Calif.) · 2016
    Randomized trial70 participantsMetabolism Boost forSelenium
  12. Metabolic response to selenium supplementation in women with polycystic ovary syndrome: a randomized, double-blind, placebo-controlled trial.
    Jamilian M; Razavi M; Fakhrie Kashan Z; Ghandi Y; Bagherian T; Asemi Z · Clinical endocrinology · 2016
    Randomized trial70 participantsMetabolism Boost forSelenium
  13. The Effects of Selenium Supplementation on Gene Expression Related to Insulin and Lipid Metabolism, and Pregnancy Outcomes in Patients with Gestational Diabetes Mellitus: a Randomized, Double-Blind, Placebo-Controlled Trial.
    Karamali M; Dastyar F; Badakhsh MH; Aghadavood E; Amirani E; Asemi Z · Biological trace element research · 2021
    Randomized trial36 participantsMetabolism Boost forSelenium
  14. Glycemic and lipid responses to selenium-enriched vs. zeaxanthin-enriched eggs in patients with type 2 diabetes: a 12-week randomized controlled trial.
    Niu X; Zhang Y; Liu Y; Zhu Y; Fang B; Hu C; Xu X; Wang R; Sang Y; Zhang Q; Guo J · Frontiers in nutrition · 2026
    Randomized trial58 participantsMetabolism Boost forSelenium