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Skald Oxydynamic Fat Scorcher Review: Does It Work for Weight Loss?

Written by Markita Lewis, MS, RD

Reviewed by Anthony Dugarte, MD 

Last Updated on June 9, 2021

Our Expert Rating:


About This Rating
The average rating of this product is calculated based on the evaluation of the following factors:
  • Support for Claims:3.0
  • Ingredient Safety:1.0
  • Value for the Price:3.0
  • Brand Transparency:3.0

A review of the research shows that several of the ingredients in Skald have limited efficacy, and this product may cause adverse effects due to the combination of stimulants.

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Skald Oxydynamic Fat Scorcher Review: Does It Work for Weight Loss?


  • Easy dosage
  • Contains ingredients that do boost energy
  • Contains ingredients that do promote fat loss


  • Contains combinations of ingredients that can potentially cause negative health effects
  • Many ingredients do not have significant clinical research to back up claims

What Is Skald?

Skald Oxydynamic Fat Scorcher is a weight-loss and fat-burning supplement reported to increase energy, speed fat loss, and boost mood in a safe and legal manner.

It was designed to replace other stimulant-based weight loss products that were banned in 2004.

The creators behind Skald are BELDT Labs, a formulator and manufacturer of products geared towards bodybuilding and sports nutrition.

I found limited information about the scientists behind BELDT Labs and little transparency about the background of the company.

Skald is reported to be a natural weight loss pill, with the claimed benefits of energy and fat loss, improved oxygen intake during exercise, elevated mood, and appetite control.

A full dose of Skald is 2 capsules daily, taken with water. The manufacturers recommend taking the first dose 15-30 minutes prior to breakfast and the second dose 5-6 hours later. Users can take up to 3 capsules daily, with the first two capsules taken before breakfast.

The ingredients present in Skald are reported to “safely” mimic the ECA stack. The ECA stack stands for ephedrine, caffeine, and aspirin, a stimulant combination that was popular in the 1990s and early 2000s for weight loss and bodybuilding.

But you may wonder, why isn’t this ECA stack popular now? In 2004, the FDA banned supplements containing ephedrine alkaloids because they presented an unreasonable health risk.

Ephedrine alkaloids mimic the effects of epinephrine and norepinephrine and generally raise blood pressure and increase heart rate.

This in turn increases the risk of death from heart failure and arrhythmia. These products were found to increase the risk of stroke and heart attack.

I don’t know about you, but the risks of cardiovascular incidents and death outweigh any potential benefits that this product may have.

Evaluation of Ingredients

This review is focused on the capsule form of Skald, but there is a Skald burner pre-workout powder available that contains an additional electrolyte blend of sodium chloride, potassium chloride, calcium citrate, and magnesium citrate.

Skald contains a proprietary blend of ingredients amounting to 356 mg per capsule, which means you will have 712 mg of this blend if taking a full dose of 2 capsules.


Tyrosine is an amino acid that is important in the synthesis of dopamine and norepinephrine.

Some research supports tyrosine supplementation for enhancing cognitive performance in healthy individuals during short-term stressful situations or mentally demanding situations.

Currently, the evidence is limited to the benefits of tyrosine on physical activity during stress.

N-Acetyl-Tyrosine is an amino acid that has potential in helping cognitive performance during stress, but does not have much evidence to support benefits for physical performance.

Green Tea Leaf Extract

Green tea extract contains caffeine and catechins, both of which are associated with energy burning and weight loss.

Catechins are polyphenols (a type of antioxidant), and green tea has nearly twice the concentration of catechins than black tea.

Catechins stimulate thermogenesis (increased energy expenditure above basal metabolic rate) and brown fat oxidation, especially when combined with caffeine.

Research on green tea catechins alone on energy expenditure is currently limited.

Green tea extract contains catechins and caffeine, which stimulates thermogenesis and brown fat oxidation when combined.

Bitter Orange Fruit Extract

Bitter orange extracts contain p-synephrine, a protoalkaloid molecule that is structurally similar to ephedrine.

This extract is commonly used for weight loss, sports performance, mental focus and cognition, energy enhancement, and appetite control.

Synephrine activates several types of adrenergic receptors, which in turn contributes to fat burning and thermogenesis.

The use of synephrine at commonly used amounts in supplements and foods is generally considered safe.

Bitter orange is often combined with caffeine to boost fat oxidation during exercise.

Bitter orange extract contains p-synephrine, a generally considered safe molecule similar to ephedrine, which activates fat burning and thermogenesis.

Caffeine Anhydrous (110 mg per capsule)

Caffeine is supported by research to promote reductions in weight, BMI, and weight loss and may help with weight maintenance.

Consumption of caffeine may acutely suppress appetite if ingested between 0.5 to 4 hours before a meal, but more research is needed on this effect.

It is also known to improve mood and cognition when provided in proper dosages.

Caffeine has a synergistic effect with compounds including acetylsalicylic acid and catechins from green tea leaf extract.

Research is mixed if there is a synergistic relationship with p-synephrine from bitter orange fruit extract.

Caffeine may suppress appetite, improve mood and cognition, and increase the activity of acetylsalicyclic acid and the catechins from green tea extract.

White Willow Bark Extract

The compound acetylsalicylic acid, commonly known as aspirin, is derived from white willow bark.

This compound is used as a pain-reliever, anti-inflammatory drug, and antiplatelet agent.

This aspirin-like compound is found in limited research to enhance the actions of the stimulants ephedrine and caffeine and the secret behind the weight loss power and energy stimulation of the ECA stack.

White willow bark extract contains an aspirin-like compound that may enhance the energy-stimulating and fat-burning activities of ephedrine and caffeine.

Verbascum thapsus Leaf Powder

Mullein (Verbascum thapsus) is a medicinal plant considered to loosen and remove the excess mucus in the respiratory tract, improve respiratory function, and reduce inflammation.

Research supports mullein having antioxidant properties, and it has been historically used in respiratory-related ailments though I was unable to find clinical trials.

Verbascum thapsus leaf powder has historical use as an herbal remedy for respiratory function, but no clinical trials exist to demonstrate its function.


Theobromine is a compound that is found in cocoa and physiologically binds to adenosine receptors in the brain.

Adenosine is known to regulate mood and behaviors including anxiety and depression.

The research does not consistently show a relationship between theobromine and mood, but it may reduce self-reported calmness.

Theobromine supplementation does not consistently improve mood, but some report having improved calmness after use.

Elecampane Root Powder

Elecampane is a sunflower-like flower from the aster family, originally grown in Europe and Asia.

Elecampane root is used in traditional medicines for the treatment of respiratory conditions, acts as an expectorant, and is reported to have antioxidant properties.

Clinical research on the effectiveness of elecampane for lung health and treatment of conditions is limited.

Elecampane root powder is used in traditional medicine for respiratory conditions, but there is little research to support its reported benefits.

Bioperine ® Black Pepper Fruit Extract

Bioperine® is a standardized piperine extract from black pepper and is known as a compound that increases the bioavailability (the amount that is active in the body) of other nutrients.

Research supports Bioperine® to be effective to increase the absorption of nutraceuticals such as curcumin, but no research on the interactions of Bioperine® on any of the other ingredients in Skald was found.

It is assumed that the Bioperine® will increase the bioavailability of the other ingredients in Skald.

Bioperine is an extract from black pepper that can increase the absorption of certain nutrients, but there is no research linking Bioperine with aiding the absorption of any of the ingredients within this supplement.

Verdict on Claimed Benefits

Here is our summary of the available support for the claimed benefits of Skald Oxydynamic Fat Scorcher, based on the available studies:

  • Energy boostingStrong Evidence
  • Fat lossStrong Evidence
  • Respiratory supportNo Evidence
  • Elevated moodModerate Evidence
  • Appetite controlModerate Evidence

Side Effects and Safety Concerns

Per the BELDT Labs website, it is recommended to first assess your tolerance to Skald by taking 1 capsule on an empty stomach, approximately 15–30 minutes before eating breakfast.

If you are able to tolerate it well, you can try a second capsule approximately 5-6 hours later.

Once your tolerance to the standard dose of Skald (2 capsules) has been fully assessed, the manufacturers say that you are able to add an additional 1 capsule to the morning dose only (max 3 capsules total in one day).

Skald contains both caffeine anhydrous and green tea extract, which are sources of caffeine.

Caffeine anhydrous is a highly concentrated form of the stimulant; you may react differently than you have with natural forms of caffeine. This can be especially dangerous if you have a history of heart conditions.

The FDA warns against excessive amounts of caffeine and recommends limiting caffeine intake to no more than 400 mg daily (an equivalent to 3 or 4 cups of coffee).

Consuming Skald with other caffeine-containing beverages, foods or supplements like coffee, tea, soda or chocolate may cause you to exceed daily caffeine recommendations and potentially result in negative side effects.

Common side effects of caffeine may include increased heart rate, insomnia, dizziness and lightheadedness, headache, diarrhea, feelings of anxiety or agitation, or upset stomach.

Caffeine toxicity can happen if you rapidly consume 1000 mg, and higher doses have been associated with seizures and even death.

If you experience any of these symptoms, this may indicate poor tolerance to Skald (or other thermogenic supplements containing stimulants).

If taking this product long-term, it is suggested to cycle off of Skald for at least 2 weeks after every 6-weeks of continuous use.

As noted earlier, a combination of ephedrine and caffeine increases blood pressure and heart rate, which can increase the risk of death from heart failure and arrhythmia.

When taken together, p-synephrine and caffeine may increase heart rate and blood pressure, though more research needs to be done to be conclusive.

Though the concentration is not listed, taking high doses of green tea extract can lead to liver failure in rare cases.

Theobromine doses of 1,000 mg caused headache, nausea and vomiting in some individuals during a clinical trial.

Elecampane is noted to cause a reaction in individuals with a history of allergic contact dermatitis or eczema.

In one case, a man developed oral mucosal lesions after 3 months having a mouthwash product containing elecampane.

White willow bark should be avoided in individuals with an aspirin allergy and in children under 16 years due to potential for causing Reye syndrome.

People with a history of gastritis, diabetes, stomach ulcers, asthma, or hemophilia should also avoid white willow bark.

White willow bark may also interact with medications including anticoagulants, beta blockers, diuretics, and NSAIDs.

Do not take Skald if you are pregnant or nursing. This supplement is only intended for use by healthy adults over 18 years of age.

I recommend speaking with your doctor before taking any dietary supplements to see if it is safe for you to start.

Stop taking this product and consult your physician if you experience any adverse effects.

BELDT Labs notes that all of their products are manufactured solely through GMP-certified labs, but no additional third-party testing of this product is done.

They also claim that all of their raw materials for the supplements are vigorously inspected using lab analysis.


Skald Oxydynamic Fat Scorcher is available as a one-time purchase, or in bundles on the BELDT Labs website:

  • A single bottle costs $49
  • 3-bottle bundle costs $83.30 ($41.65 per bottle)
  • 6-bottle bundle costs $117.60 ($39.20 per bottle).

You can pay in installments using Sezzle or PayPal. Skald is also available for purchase on Amazon through BELDT Lab’s storefront.

Products can only be returned if purchased through the BELDT Labs website within 60 days for a full refund. Other return policies are per Amazon.

How It Compares to the Competition

Skald Oxydynamic Fat Scorcher is noted to have ingredients that are geared towards supporting lung health in addition to its blend for energy and fat burning, which is something that I did not see in several competing fat-burning supplements.

These ingredients may be helpful in improving the lungs’ capacity to do work during intense exercises, allowing individuals to increase the length of their exercise.

Still, the lack of research undermines the efficacy of these ingredients.

Some supplements may use Yohimbine as their source of p-synephrine and include other ingredients to provide mood-boosting effects during your workout.

The cost of Skald appears to be higher than most fat-burning supplement competitors, including some well-known brands.

The reportedly added benefit of lung support is from ingredients that are not well researched and is not worth the additional cost.

You should spend your money on supplements that have a majority, if not all of their ingredients backed by rigorous research.

Skald is unique in that it contains ingredients to support lung health, but the research is weak in proving this claim. This doesn’t make the higher cost of Skald worth it compared to other thermogenic supplements.

The Bottom Line

Overall, Skald Oxydynamic Fat Scorcher’s ingredients live up to their energy boosting and fat loss claims, but there is still much to be desired.

Many of the ingredients, while used in traditional medicine, have limited or no clinical research to confirm their effects.

And despite being reported to be a safe and natural version of an ECA stack, there still appears to be cardiac risks (elevated blood pressure and heart rate) involved with taking a stimulant-based fat and weight loss supplement containing p-synephrine and caffeine.

Outside of this combination, high dose green tea extract may negatively impact the liver.

As a registered dietitian and health professional, I would not recommend this product due to the potential risks.

A Word from Our RD

Fat loss, respiratory support, and energy-boosting effects can be obtained through certain lifestyle habits like a varied diet, regular exercise, sleep, and supporting your body’s natural circadian rhythms.

If you choose to use supplements, I recommend ones that do not have significant potential adverse health effects.

If you are looking to obtain your ideal fat and weight goals, consulting with professionals like doctors, registered dietitians, personal trainers, and other health and wellness professionals can help you achieve your goals safely.

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