Home News Hashish & COVID-19: Breaking Information or Bogus Science?

Hashish & COVID-19: Breaking Information or Bogus Science?


A current story hit my newsfeed – and hit it time and again – about how “New analysis exhibits that hashish can stop or deal with COVID!” Examples could be seen here, here, and here.

Hashish is commonly touted as a ‘cure-all’, and whereas there may be certainly a variety of verified therapeutic properties related to hashish use, there may be additionally no scarcity of anecdotal claims which are, effectively, bullshit. As somebody who wrote and defended a PhD dissertation about how cannabinoids are working inside our our bodies, these claims are likely to get below my pores and skin in all probability greater than they rightfully ought to.

The headlines I examine hashish and COVID undoubtedly brought on my well-honed bullshit-meter to tingle, however the story was being so broadly reported that I made a decision to present it the advantage of the doubt and really learn the total research being cited by these information shops with an open thoughts.  For the reader’s comfort, the research in query by 5 researchers on the College of Lethbridge could be discovered here.

Purple Flags

Earlier than even studying the article, there have been a number of evident issues that caught out to me:

  1. The article is printed within the multidisciplinary journal PrePrints. As a scientist, I’m utilizing the time period ‘journal’ fairly loosely on this case as a result of PrePrints is not peer-reviewed. In impact which means scientists and clinicians won’t take these outcomes very significantly, and with good purpose. These are solely preliminary analysis findings and shouldn’t be confused for a reputable scientific research. Observe that I don’t have a problem with a ‘preprint’ format per say, however I firmly consider that these kinds of early knowledge ought to be used to drive additional analysis, moderately than to generate any conclusions from it.
  2. All the Canadian-based authors, together with Dr. Igor Kovalchuk, CEO and controlling shareholder of the Alberta Analysis and Growth firm (“Swysh”), have conflicts of curiosity, which they disclose on the finish of the article, as Pathway Analysis and Swysh are startup corporations engaged within the hashish and cannabinoid drug improvement area. [See Editor’s Note at the end of this article.]
  3. From the summary I see that the experiments have been carried out solely in synthetic cell tradition fashions. Not a lot as a single human or animal has been examined to again up any of their conclusions. There may be incessantly an enormous hole between what we observe in a plate of cultured cells vs. what occurs in animal fashions vs. what we observe in an actual human.

Then I learn the paper. It’s effectively written sufficient in order that it’s simple to inform it was written by an actual scientist, albeit with some poorly designed experiments and maybe misguided conclusions. At greatest, the research gives an fascinating preliminary preclinical discovering that warrants further research. However the information headlines grossly exaggerated conclusions from some quite simple preliminary knowledge. The article because it at the moment stands (in my view) can be extremely unlikely to make it previous peer-review and right into a revered scientific journal. Any second-year biochem grad scholar price their salt ought to be capable to tear these experimental knowledge aside and expose many flaws.

The ACE2 Protein

Let’s break down the experiments as if we have been assigned to see overview this research. Not everyone seems to be a scientist so we must always in all probability do some background science lesson to get began. SARS-CoV-2 (aka COVID-19) is a virus, an unimaginably small factor that should discover a method to get previous our physique’s defenses and inside our cells with the intention to propagate and keep ‘alive’ (for lack of a greater lay time period). The virus primarily does this by boring its method into cells via a protein that’s discovered on the floor of our cells. Often called angiotensin-converting-enzyme-2 (ACE2), this protein is most prominently expressed in lung tissue. As soon as inside, the virus ‘methods’ our cells into making extra copies of the virus, the method repeats, and the an infection spreads.

The researchers’ claims are speculations on human implications based mostly on how hashish extracts affected ACE2 ranges in a cell tradition dish. They grew cells in a plastic plate and aggravated these cells by including some inflammatory cytokines to induce irritation, then handled the cells with numerous hashish oil extracts and regarded on the degree of ACE2 RNA and ACE2 protein present in these cells.

RNA is translated into protein by our cells, so having extra RNA round usually means there can even be extra protein, but it surely’s undoubtedly not at all times the case. If there may be much less ACE2 protein being expressed, the authors speculate, then this may result in decreased susceptibility to the illness as there will probably be much less entry factors for the virus to enter a cell.

Fudging the Figures

Going over each determine intimately might be extreme for the aim of this text, so let’s simply select one determine and provides it a scientific peer overview. For my part, Determine 2 is probably the most egregious. Determine 2 is damaged down in to a few components, (2A, 2B, 2C).


Determine 2 from: Wang, B.; Kovalchuk, A.; Li, D.; Ilnytskyy, Y.; Kovalchuk, I.; Kovalchuk, O. In Search of Preventative Methods: Novel Anti-Inflammatory Excessive-CBD Hashish Sativa Extracts Modulate ACE2 Expression in COVID-19 Gateway Tissues. Preprints 2020, 2020040315

Beginning with 2A and 2B, the bars on these two figures are representing the quantity of ACE2 RNA being expressed within the cell tradition within the numerous therapy situations. Of the 13 hashish oils examined, two of them (extracts #81 and #130) have been concluded to considerably scale back the quantity of ACE2 RNA present in these cells. Nonetheless, I can’t appear to search out any distinction between the experimental situations between 2A and 2B, so they need to actually be put collectively right into a single determine and the info analyzed as a set. However discover how the management situation (DMSO) got here out to be fairly a bit larger in 2A than in 2B. In my opinion, the inconsistency of those controls undermines the credibility of the entire experiment. Additional, I’ve a sense that the weak statistical significance noticed in 2A is likely to be misplaced if the dataset have been analyzed the ‘right’ method in its entirety.

Sadly, we will’t know this for certain because the researchers don’t really disclose the statistical strategies that have been used, solely stating that these datasets have been analyzed utilizing an ‘ANOVA-like’ evaluation. It’s vital for scientific papers to be crystal clear concerning the statistical fashions which are being utilized.  An ANOVA can be applicable on this case, however I don’t know what an ‘ANOVA-like’ evaluation is – I suppose it’s virtually like an actual statistical technique! Additional, the textual content tells us that these experiments have been repeated solely twice and an n=2 is usually not deemed appropriate by most journals for statistical evaluation on this kind of knowledge.

Filtered Findings

On to Determine 2C. As an alternative of RNA, we at the moment are trying on the precise quantity of ACE2 protein that was present in these cultured cells. The researchers used a quite common lab method referred to as a Western Blot, which might measure the quantity of protein in cells.  Mainly, you break open the cells, acquire all of the proteins, and filter them by measurement via a porous gel. {An electrical} present pulls small proteins via the gel, whereas bigger proteins get caught. Antibodies are then used to establish a specific protein of curiosity, corresponding to ACE2.

What’s proven within the first a part of Determine 2C is a picture of related parts of this gel. Darker bands usually correspond to extra protein, however in case you had extra cells to start out with then clearly you’re going to get extra protein! Researchers want a management situation if we wish to evaluate outcomes from completely different cultures. With a view to account for this, we are going to sometimes embody one other protein within the evaluation, referred to as a ‘loading management,’ which demonstrates equal loading of samples throughout all experimental situations. Proteins corresponding to GAPDH function a superb loading management, as this protein is stably and constitutively expressed throughout most tissues and cell varieties.

The loading management proven in Determine 2C is method overloaded, as indicated by the utterly black smear within the GAPDH situation, so it’s unattainable to inform if there really is diminished ACE2 protein expression or if there have been merely completely different quantities of complete protein loaded into the Western Blot. The blot knowledge was then quantified via densitometry (Fig. 2C, backside), which basically compares the darkness of the band related together with your protein-of-interest vs. the darkness of the loading management with the intention to quantify relative abundance of protein in every respective pattern.

Densitometry ought to NOT be carried out when you could have an overexposed loading management, and due to this fact it mustn’t have been carried out right here. It was carried out, although, and the researchers posit that a number of of their hashish pressure extracts resulted in important downregulation of ACE2 protein. Amongst them is pressure #1, which highlights the absurdity of their conclusions. To my eyes, extract #1 exhibits the second-darkest band of the pattern set, that means that there ought to be extra ACE2 on this pattern in comparison with the management. Nonetheless, from the densitometry evaluation they conclude that pressure #1 resulted in important discount of ACE2, which may be very clearly not the case via a easy qualitative evaluation of their gel picture. 

It’s additionally price noting that the extracts that brought on a rise in ACE2 protein weren’t marked as being considerably completely different from the management, regardless that a few of the samples (#45 particularly) confirmed such a stark enhance that they virtually actually achieved statistical significance. So, their determine exhibits us that some strains are literally inflicting a rise ACE2 expression. By the authors’ personal logic which means some hashish strains will really be dangerous if taken for COVID! After all, there’s no method to know if the hashish you could have stashed in your closet at residence would enhance or lower ACE2 ranges, as all the strains examined on this paper are proprietary property developed by the authors’ firm.

Haphazard Experiments

The opposite experiments which are outlined within the Preprints paper more-or-less repeat the experiments mentioned above utilizing various kinds of cultured cells. Nonetheless, their alternative of experiments appears haphazard, as in the event that they’re fishing for correlations moderately than methodically assessing a speculation. Determine 2 checked out ranges of ACE2 RNA and protein to evaluate its degree of expression in a mannequin of oral cells, whereas Determine 3 checked out ACE2 RNA (however not protein) in tracheal/bronchial cells, and Determine 4 checked out ACE2 expression (again to quantifying each RNA and protein) in a mannequin of intestinal cells.

There appears to be little logic within the strains that have been chosen to check in a single mannequin to the following. Why would the strains that confirmed important discount of ACE2 in respiratory cells (#5, #10, & #31) not even be examined in any of the oral or intestinal fashions? Why not take a look at protein expression like was achieved for the opposite fashions? Even inside the similar cell sort there are unusual inconsistencies, corresponding to strains #81 and #130 being the one extracts that confirmed important discount in ACE2 RNA (Fig. 2A) and so they weren’t even included as strains examined on the protein degree (Fig. 2C). It is senseless!

Even when the identical strains have been examined amongst completely different fashions, I really feel there ought to have been some dialogue from the authors declaring that they noticed completely completely different results between the completely different cell varieties. For instance, pressure extract #45 was proven to considerably lower ACE2 within the intestinal mannequin (Fig. 4) and drastically enhance ACE2 within the oral cell tradition mannequin (Fig. 2). This looks as if an vital omission from the dialogue. In any case, lung-derived cells weren’t even examined, so how do we all know that these strains don’t really enhance ACE2 expression in our lungs, the primary web site of entry for COVID-19? The reply is that we don’t.

I additionally really feel the authors ought to have mentioned that they discovered completely no correlation to the CBD or THC content material within the strains that confirmed efficacy of their experiments. If there are certainly actual results brought on by these hashish strains, then it’s virtually actually because of one thing within the extracts aside from the key phytocannabinoids. Maybe it’s the terpenes or flavonoids? Or maybe we’re simply observing statistical probability because of improper repetition of experiments. In the event you examined sufficient completely different olive oil extracts, I’d enterprise to guess that you’d additionally discover important results on ACE2 expression from a few of them. Results which are ‘actual’ are discerned via correct repetition and complementary experimentation, which I discover missing on this paper.

Positive, it’s possible that hashish reduces ACE2 expression and thereby lowers infectivity of COVID-19, however the knowledge introduced right here give me little or no confidence in that conclusion. Even when the experiments have been carried out to the purpose the place I used to be utterly satisfied that ACE2 was really being downregulated in human cell tradition by therapy with hashish oil, it’s a HUGE freaking leap to imagine that this is able to have any bearing in any way in a real-life in vivo setting.

Unvetted Science

Lastly, I’d like to notice that I’m not making any accusations of misconduct on behalf of the analysis group at Lethbridge. It’s inside their rights to publish the analysis knowledge that they generated wherever they’d like. Although, I’ll point out that there are some pretty damning allegations made prior to now towards this group, with three of their publications being featured in PubPeer, a web based discussion board that helps scientists to reveal misconduct. However I can’t communicate to these earlier articles and so they stay unretracted of their respective journals.


This picture was posted on PubPeer, alleging picture manipulation in a earlier paper by the Kovalchuks. Determine 1 and Determine 3 are layed out facet by facet. The 5 photographs boxed in yellow, pink, inexperienced, purple, and sky blue could be seen twice. They’re utilized in Determine 1, then they’re mirrored or rotated and reused in Determine 3, indicating that photographs have been photoshopped.

Whereas I feel there are some evident flaws within the current article, I can’t conclude that there’s any apparent misconduct or unethical habits on the facet of the researchers (other than maybe glossing over some factors that might be inconvenient to their narrative). Although I did discover it unusual how incessantly a hypothetical ‘hashish mouthwash & throat gargle’ was repetitively talked about all through the article. If I have been of a extra suspicious nature, this would possibly trigger me to take a position that the authors have been prepping a brand new product launch for his or her firm with this PrePrints paper. It’s doubtless not the case, but when a Swysh/Pathway Analysis hashish mouthwash hits the Canadian dispensary cabinets anytime quickly, then I could rethink my tackle the ethics at play right here. [See editor’s note below.]

In my opinion it’s the information shops which are chargeable for misrepresenting analysis of their unending quest for clickbait headlines. Journalists ought to be held chargeable for vetting scientific articles prior to creating scientific claims from preclinical analysis, notably from this kind of very preliminary analysis that has not even gone via the peer-review course of. A skilled scientist will simply see via this for what it’s, however the writing type and format utilized by Preprints will seem like ‘official’ scientific analysis to the overwhelming majority of the inhabitants, even when there’s nothing notably noteworthy being introduced.

Unvetted science is fueling COVID-19 misinformation. It’s harmful, and the issue permeates to many different societal subjects at the moment other than COVID. It deeply frightens me that now we actually have a U.S. president who routinely denounces actual science and scientists with the intention to actually make up no matter ‘info’ occurs to swimsuit his agenda.

Greater than ever, we’d like the vital eye of scientists in the course of the peer-review course of to assist vet the bullshit. Peer-review is much from excellent, however it’s the greatest system accessible for us to stop flawed or inaccurate analysis from reaching readers who haven’t had the coaching to be able to correctly evaluating it.

Regardless of the information headlines that you’ll have learn, this hashish scientist will let you know that we’re nonetheless a really far method off from contemplating hashish as a reputable candidate for preventative or therapeutic therapy of COVID-19 infections.

EDITORS NOTE (June 15, 2020): Venture CBD has discovered that the Preprints manuscript in query was submitted and posted on-line one month after a patent was filed on the Swysh mouthwash that’s overtly peddled within the PrePrints article. This was not disclosed by the authors of the PrePrints article, a ploy that means the PrePrints article is extra a glorified investor pitch than a reputable scientific report. Because of neuroscientist Greg Gerdeman for bringing this patent software to our consideration. “It actually makes me query the ethics of how preprint ‘journals’ function,” says Gerdeman.

Dr. Matt Elmes is a hashish fanatic and molecular biologist who has authored quite a few peer-reviewed papers on cannabinoid science. He at the moment serves because the Director of New Product Growth for Care By Design.

Copyright, Venture CBD. Might not be reprinted with out permission.