Watchdog Approved Diet Pills


As women age, their metabolic rate naturally declines, as hormone changes make it harder to maintain and build muscle mass, a key factor in determining metabolic rate. Estrin-D claims to be formulated for women over 40 who want to lose weight, but are struggling, perhaps due to age related factors.

Estrin-D Pros

  • Clinical review to support product

Estrin-D Cons

  • High in caffeine
  • Relevant clinical review information unavailable
  • No information about manufacturers
Watchdog Rejected Diet Pills

Estrin-D Review

Estrin-D Facts

  • Manufactured by Covaxil Laboratories
  • 90 capsules per bottle
  • Aimed at menopausal and perimenopausal women

The sales pitch for Estrin-D makes it seem as if it used to be easier to lose weight when the potential customer was younger, stating “Remember when we could go on a diet and lose 10 or 15 pounds in just a few days? Well, we’re not in our 20′s anymore.”

It feels more that they are trying to make women who are struggling to lose weight feel bad about themselves and their age<, in case that makes them more likely to buy this product. The woman in the video advertisement also uses "we" rather than "you", making the customer feel as if they are not alone in their weight loss struggle.

The official website talks about a clinical study of Estrin-D. However, the information is vague, and clearly manipulated to make the product sound incredibly effective, stating;

Group A (the Estrin-D group) experienced a significant decrease in overall body weight—an incredible 1603% more weight loss (over 16 TIMES more) than those who took a placebo—without following a complicated diet program or following a prescribed exercise regimen.

This does not actually refer to how much weight was lost- 1603% more could be merely a few pounds lost over the 6 week study, compared to a few ounces lost on the placebo diet. For more information on this study, check out the Estrin-D FAQs page.

The manufacturer of Estrin-D is supposedly Covaxil Laboratories. However, this was all the information we could find about the company, as there is no official webpage or even company address made available. Those wishing to contact the company can phone the order hotline on 1-800-351-9882, or can send their questions through a generic contact form on the website.

Estrin-D Concerns:

  • High in caffeine
  • Relevant clinical review information
  • No information about manufacturers

What Does Estrin-D Claim To Do?

According to those advertising Estrin-D;

Estrin-D targets the three critical factors that women over 40 need to lose weight. First, Estrin-D increases a sluggish metabolism, so you burn additional calories… even at rest.
Second, Estrin-D improves hormonal balance so you lose weight in all the right places. Finally, Estrin-D gives you all the energy you’ll ever need… day or night.

So What Is Estrin-D and What Are The Ingredients For Estrin-D?

The official website does not release the ingredients of Estrin-D, describing the product only as;

A powerful, non-ephedra weight-control compound designed specifically to help menopausal and perimenopausal women overcome their unique weight-loss problems.

Thankfully, other websites that sell this diet pill do provide a full ingredients list, as detailed on the side of the packaging.

Each serving size of two capsules provides 1323 mg of the Estrin-D Blend.

No individual ingredient quantities are provided, other than for vitamin D (500 IU, 125% RDA), Vitamin B6 (25mg, 1250% RDA) and magnesium (100mg, 25% RDA).

The Estrin-D Blend consists of:

  • Vitamin D: Research published in April 2014 suggests that vitamin D supplementation may aid weight loss in postmenopausal women, when compared with a placebo.
  • Vitamin B6: Vitamin B6 has several important functions in the body, including ‘allowing the body to use and store energy from protein and carbohydrates in food’. Whilst taking excess amounts of vitamin B6 will not infinitely improve this ability, a deficiency could make it more difficult to lose weight.
  • Magnesium: This mineral helps to turn the food we eat into energy.
  • Yerba Mate Leaf Extract: A plant that is typically brewed as a tea, yerba mate is a natural source of caffeine, and has been the subject of several studies on weight loss. In a 2001 study of 47 healthy overweight adults, researchers found that taking an herbal preparation of yerba mate, guarana, and damiana three times daily for 45 days induced weight loss. It is not clear whether the individual ingredients from this preparation have the same weight loss potential on their own, or how much of each ingredient is required to replicate the results of the study. See our article on Yerba mate for more information.
  • Guarana Seed Extract: A berry that is naturally high in caffeine, it is often an ingredient in energy drinks and diet pills.
  • Damiana Leaf Extract: In a 2001 study of 47 healthy overweight adults, researchers found that taking an herbal preparation of yerba mate, guarana, and damiana three times daily for 45 days induced weight loss. However, there are no studies into the effects of Damiana upon weight loss when used on its own.
  • Green tea leaf extract: Green tea is high in a group of antioxidants called catechins. Studies have suggested that catechins and caffeine both increase energy expenditure by boosting the metabolism temporarily. However, the metabolic increase caused by green tea is limited. One study found that the use of green tea was not enough to counteract weight gain following a very low calorie diet.
  • Caffeine: Numerous studies have shown that caffeine boosts energy levels and alertness, as well as mildly boosting the metabolism, causing a small increase in the number of calories used by the body. The effects shown in studies are small, and some studies are inconclusive.
  • Ginger: Some studies suggest that ginger root is an appetite suppressant. One study used dried ginger powder to make a tea that participants drank with breakfast. Researchers found that satiety levels were much higher when the tea was consumed with breakfast, rather than just the breakfast on its own.
  • Kola Nut Seed Extract: Kola nut has been studied in relation to weight loss, but in conjunction with ephedra, a substance that is now banned in the U.S due to severe side effects. As a source of caffeine, Kola Nut may boost the metabolism mildly. In animal studies, regular use of kola nut over a month resulted in a decrease in both appetite and body weight.
  • DHEA: Short for dehydroepiandrosterone, this is a hormone produced in the body. DHEA production declines with age. Some people believe that it can improve the sex drive, fight the effects of aging, and improve some health conditions. In terms of promoting weight loss, DHEA is thought by some to aid in building muscle, therefore helping to boost the body’s natural metabolic rate, but there is little clinical evidence to support this.
  • Schisandra Fruit Powder: Schisandra is also used for preventing early aging and increasing lifespan, normalizing blood sugar and blood pressure, and stimulating the immune system, as well as an adaptogen, supposedly increasing resistance to disease and stress. There is little clinical evidence to support any of these uses.
  • Chinese Skullcap Root Extract: This member of the mint family contains several different active compounds, which may have a variety of effects, such as being anti-inflammatory, anti-hypertensive, anti-anxiety and liver-protective properties. However, its usual dose is considered to be between 3 and 9 grams per day, making it unlikely that the much smaller dose in Estrin-D will have any beneficial effects at all.
  • Rhodiola Crenulata Root Extract: The Rhodiola plant is thought to increase endurance, based upon studies in rats, and is thought to be an adaptogen, as well as being used to treat altitude sickness, and reduce fatigue. However, much of the relevant information and studies have shown results in Rhodiola Rosia, rather than Rhodiola Cenulata.
  • Cocoa Seed Extract: Typically used to make chocolate because of its cacao content, there is little evidence explicitly this ingredient with weight loss. Studies in rats suggest it can lower cholesterol levels. It may act mildly as a stimulant.
  • Jujube Fruit Powder: Jujube is sometimes called a red date or Indian, Chinese or Korean date, and may lower blood pressure. It is also used in anti-wrinkle skin products.
  • Black Tea leaf extract: Black tea is another source of caffeine. Studies have also suggested that black tea leaves contain high levels of some polythenols, which have caused weight loss in rats on high fat diets, by inhibiting absorption of fat from the intestines.

So What Does All This Mean?

There is likely a huge amount of caffeine in this diet pill, as green tea, black tea, kola nut, yerba mate, guarana and obviously Caffeine all contain the stimulant. Without knowing exact ingredient quantities, it is quite likely that this could cause side effects such as jitteriness and insomnia, as well as the desired increase in energy levels and increase in the metabolism.

Some of the ingredients appear to be unrelated to weight loss or the metabolism in any way, and are reputed to have anti-aging or health improving properties, although there is little clinical evidence to support these properties.

Does Estrin-D Have Any Side Effects?

This product contains high levels of caffeine, which can cause a wide range of side effects including headaches, insomnia, heart palpitations, increased blood pressure and increased heart rate.

Possible side effects of DHEA supplements can include: Oily skin and acne, as well as skin thickening, hair loss, stomach upset, high blood pressure, changes in menstrual cycle, facial hair in women, deepening of the voice in women, fatigue, nasal congestion, headache, rapid or irregular heartbeat, insomnia, and unfavourable changes in cholesterol levels.


Avoid if you are pregnant or breast-feeding.

Any Estrin-D Reviews From Customers?

The official website includes no testimonials from customers, or any place to leave reviews. However, Estrin-D is also sold elsewhere, and these websites have a variety of reviews from customers.

Customers seem to be split over how well this product works. Most customer agree that it does boost energy levels, most likely thanks to the high caffeine content. However, some people are not convinced that it aids with weight loss:

I have to say at first I wasn’t sure this product was going to work. I thought for the price, it’s worth trying. Been using a week and so far I have more energy, can stay up late and get up early without feeling run down. Too early to say if it helps with the mood swings and the weight loss. I’ll give it 30 days and if I see a difference in these areas, I’ll update my review.

March 26th, 2013: Here’s my 30 day update. Weight Loss, not much. Mood swings, has helped but not resolved. Energy boost is still there. I’ll continue to the end of 90 days. If weight loss kicks in, I’ll give another update to my review.

It’s now April 24th, 2013 and I can truly say this stuff does not work for weight loss. I can say that the mood swings are minimal and the energy boost is still there. I don’t plan on purchasing this product again.

There are customers who are incredibly impressed with this product.

LOVE IT! LOVE IT! LOVE IT! This is the first product I have used which has allowed me to not only loose weight, but also loose inches. It is one thing to see the numbers on the scale going down, but it is another to look at yourself from week to week and see your shape returning.

If you have problems with products containing stimulants, you will probably want to avoid this product. I have found only one capsule per day is needed for my energy level to maintain throughout the day and still be able to sleep at night. I do not take this product past noon due to the high level of stimulants it contains. My best recommendation would be to know your body 100% before using.

So Does Estrin-D Work?

Some customers do seem to lose weight whilst using the product, but many of the positive reviews are from women who have found the product boosts energy levels significantly, minimises some symptoms of the menopause, or mildly suppresses the appetite (although many have no weight loss to show for it).

The clinical trial sounds promising, but a closer read shows it is likely a manipulation of results rather than accurate and representative data. There is not even a link to the actual study, which appears to be unpublished.

Estrin-D may work for some, but there is not enough evidence to support its use in general, making it more of a trial and error diet pill.

Where Can I Buy Estrin-D?

Estrin-D can be purchased from the official website. A 30 day supply costs $59.99 plus delivery, or customers in the US can sign up for their Preferred customer plan, which is an automatic shipping arrangement, with the first order being $59.99, and subsequent deliveries being charged at $47.99, with free shipping and handling.

This is quite a high price for a diet pill, but luckily other retail websites also sell Estrin-D, at a reduced price. On Amazon, a bottle of 90 capsules sells for $26.21. For UK purchasers, Estrin-D is available for £15.62 plus shipping, from the uk.evitamins site.

What About A Guarantee

According to the official website for Estrin-D, there is a 30 day money back guarantee if the customer is not satisfied with their product. Customers should return the product to the place of purchase.

Watchdog Verdict

Estrin-D claims that it makes weight loss easy again for women over 40. Considering how large the diet pill industry has become in recent years, it is easy to say that significant and long term weight loss is not an easy accomplishment for many people, no matter their age. The diet pill is supposed to be a metabolism booster, but its main stimulant is merely caffeine, naturally present in 5 of the ingredients in this diet pill, as well as being added as a separate ingredient.

Because of the lack of research available on many of the ingredients, as well as the huge amounts of caffeine, side effects are likely, especially in those who already have cardiac related health issues such as high blood pressure.

Some of the ingredients are not even related to weight loss, whilst others are either under-researched, or their weight loss properties are merely attributed because of folk remedies. The customer comments also support the idea that this product is not a great weight loss aid; whilst users’ energy levels are boosted, there seems to be little consistency with people losing any weight.

Finally, the lack of available information about the manufacturer, Covaxil Laboratories, is concerning. Contact information is minimal, and there is no manufacturer information or official webpage. Even their location is unavailable.

With all of these flaws, it is not possible to recommend Estrin-D to any customers, no matter how well they match the target demographic. As such we reject Estrin-D.

Watchdog Rejected Diet Pills

#1 Consumer Choice: Superfruit Slim

Superfruit Slim

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Disclaimer: Our reviews and investigations are based on extensive research from the information publicly available to us and consumers at the time of first publishing the post. Information is based on our personal opinion and whilst we endeavour to ensure information is up-to-date, manufacturers do from time to time change their products and future research may disagree with our findings. If you feel any of the information is inaccurate, please contact us and we will review the information provided.

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