DOES COLLAGEN IMPROVE INTESTINAL TRANSIT?
Many people who have started taking collagen consistently report improved bowel function. Let's try to understand what this may be due to.
There are virtually no studies on the subject in the literature; the only one I found is tiny: it followed 16 women for 8 weeks. (1)
La cosa perรฒ super interessante รจ che 14 di loro avevano problemi di gonfiore e irregolaritร intestinale e dopo 8 settimane di assunzione di 20 grammi al giorno di collagene il 93% di loro aveva migliorato la frequenza intestinale e diminuito il gonfiore! Il 19% aveva addirittura iniziato a scaricarsi una volta al giorno invece di una volta a settimana! Purtroppo il campione รจ piccolo, ma i risultati sono sorprendenti!
Let's start right away with the objections: the study was funded by a company that produces collagen. I would like to understand one thing: why is it not okay for collagen companies to fund studies demonstrating the efficacy of collagen, while there is no problem when pharmaceutical companies fund studies demonstrating the efficacy of the drugs/vaccines they produce? It seems to me that double standards are being used.
Anche perchรฉ siamo realistici: purtroppo i governi destinano pochissimo alla ricerca scientifica, quindi chi dovrebbe finanziare degli studi scientifici se non le aziende che beneficerebbero dai risultati? Il problema non รจ chi finanzia gli studi, ma la serietร e lโonestร nella conduzione degli stessi.
Vi faccio un esempio: i dati grezzi (raw data) su moltissimi studi sullโefficacia delle statine non sono pubblici e nonostante diversi ricercatori indipendenti li abbiano richiesti, non sono stati resi disponibili. (2, 3) Se non hai nulla da nascondere perchรฉ tieni nascosti i dati? Ciรฒ che rende la situazione ancora piรน triste รจ alcuni di questi studi sono stati finanziati anche con soldi pubblici.
Let's look at what might be the mechanisms of action of collagen on improving bowel function.
When someone makes a health claim, always ask yourself: what is the mechanism that makes it true? Doing so will easily expose many false myths.
RETAINS WATER
Because collagen is a hydrophilic molecule, it attracts water. By holding water in the intestines, collagen helps the movement of food through the gastrointestinal tract.
Questa caratteristica del collagene spiega anche perchรฉ alcune persone assumendo collagene fanno esperienza di costipazione: non bevono abbastanza. Assumendo piรน acqua il problema si risolve.
IMPROVES THE INTESTINAL BARRIER
Two in vitro studies simulating the human intestine with collagen supplementation found:
- Reduction of permeable bowel syndrome (leaky gut) (5)
- decrease in inflammation (5)
- Increased production of short-chain fatty acids (6) including butyrate, which we know has anti-inflammatory capabilities.
In another experiment, human immune cells taken from patients with inflammatory bowel disease (IBD) treated with collagen showed changes related to an anti-inflammatory and antioxidant effect.
Io non sono una grande fan degli studi in vitro, in quanto le reazioni che avvengono nel corpo umano sono interconnesse e non isolate come avviene negli studi in vitro. Ci sono perรฒ dei meccanismi logici dietro a questi risultati:
- nella struttura dellโintestino cโรจ anche collagene (4) e quindi lโassunzione di collagene fornisce aminoacidi che possono essere utilizzati anche per sintetizzare nuovo collagene che la parete intestinale puรฒ utilizzare per rinnovarsi e guarire eventuali lesioni.
- Glutamine has a positive impact on the balance of intestinal flora, supports the integrity of the intestinal barrier, and modulates inflammation (7)
- glycine is crucial for the synthesis of glutathione (8,9), which in turn is crucial for counteracting intestinal inflammation (10)
I think it now becomes clear what mechanisms underlie the benefits on the gut of collagen.
DIARREA
Some people taking collagen instead of experiencing intestinal benefits experience soft stools. How come?
There are a couple of explanations:
- when proteins arrive in the stomach they cause the production of hydrochloric acid necessary for their digestion. For some people taking almost 20 grams of protein all at once in one meal is unusual, and therefore the amount of hydrochloric acid produced can cause diarrhea in some people
- if a person has low stomach acidity, proteins are not digested properly and some fragments will arrive undigested in the colon where they can create diarrhea
- there could be a problem at the level of gut bacteria, such as dysbiosis
Soluzione? Provare a diminuire la quantitร e aumentarla gradualmente: Se il problema sussiste, consultare un esperto.
OTHER BENEFITS OF COLLAGEN
I possibili benefici osservati negli studi scientifici legati allโassunzione di collagene sono:
- Skin: improves hydration and elasticity (11 - 16) but unfortunately does not eliminate wrinkles.
- Joints: improves osteoarthritis (17-19), rheumatoid arthritis (20,21), knee pain (22)
- Bones and muscles: increased bone density (23,24), improved bone metabolism (25), rehabilitation from tendon injuries (26), increased collagen synthesis (27)
- Nails: more growth and less fragility (28)
- Exercise: muscle pain reduction and improvement after exercise (29)
Queste sono alcune delle ragioni per cui io credo che il collagene sia il vero superfood e dovrebbe diventare il quarto macronutriente, in quanto รจ l’alimento in assoluto piรน ricco di glicina, che si trova solo in piccole quantitร nella maggior parte delle proteine. Gli alimenti piรน ricchi di glicina e quindi di collagene sono: gelatina, nervetti, pelle di animali (quella piรน ricca รจ quella di maiale), tagli ricchi di collagene come la coda bovina. (30)
IMPORTANT
I want to emphasize that none of these benefits are certain. The only health claims that are proven and officially recognized are those published on the EFSA website.
BIBLIOGRAPHY
1) https://pmc.ncbi.nlm.nih.gov/articles/PMC9198822/
2) https://pubmed.ncbi.nlm.nih.gov/29353811/
3) https://www.bmj.com/campaign/statins-open-data
4) https://en.wikipedia.org/wiki/Collagen,_type_III,_alpha_1
5) https://pubmed.ncbi.nlm.nih.gov/28174772/
6) https://pubmed.ncbi.nlm.nih.gov/34444880/
7) https://www.sciencedirect.com/science/article/pii/S2213453021000112
8) https://www.sciencedirect.com/science/article/pii/S0022316623026639
9) https://pmc.ncbi.nlm.nih.gov/articles/PMC5855430/
10) https://pmc.ncbi.nlm.nih.gov/articles/PMC1727080/
11) https://pubmed.ncbi.nlm.nih.gov/33742704/
12) https://pubmed.ncbi.nlm.nih.gov/32436266/
13) https://pubmed.ncbi.nlm.nih.gov/30681787/
14) https://pubmed.ncbi.nlm.nih.gov/26561784/
15) https://pubmed.ncbi.nlm.nih.gov/29114654/
16) https://pubmed.ncbi.nlm.nih.gov/31096622/
17) https://pubmed.ncbi.nlm.nih.gov/30368550/
18) https://pubmed.ncbi.nlm.nih.gov/29018060/
19) https://pubmed.ncbi.nlm.nih.gov/22521757/
20) https://pubmed.ncbi.nlm.nih.gov/19951408/
21) https://pubmed.ncbi.nlm.nih.gov/9485087/
22) https://pubmed.ncbi.nlm.nih.gov/33562729/
23) https://pubmed.ncbi.nlm.nih.gov/29337906/
24) https://pubmed.ncbi.nlm.nih.gov/32883033/
25) https://pubmed.ncbi.nlm.nih.gov/32131366/
26) https://pubmed.ncbi.nlm.nih.gov/30609761/
27) https://pubmed.ncbi.nlm.nih.gov/27852613/
28) https://pubmed.ncbi.nlm.nih.gov/28786550/
29) https://pubmed.ncbi.nlm.nih.gov/30783776/
30) https://fdc.nal.usda.gov/food-search?component=1225




















































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