酵素可以減肥，無知婦孺才會受騙。首先要明白什麼是酵素 (Enzyme)︰
存於生物體內的蛋白質性觸媒，持有特定基質的作用。則是在生物體內，物理性條件（濃度、溫度與pH值等）之下，進行化學反應，有助於消化器官，或組織內營養素的分解，和進行各種代謝作用。
An enzyme is a substance that acts as a catalyst (催化劑) in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. The biological processes that occur within all living organisms are chemical reactions, and most are regulated by enzymes.
既然酵素能夠有助分解食物，便可以加速吸收，人會得到更多營養，理論上只會導致肥胖。
延伸閱讀︰
Key and lock hypothesis (假設) of enzyme
Enzymes are folded into complex 3D shapes that allow smaller molecules to fit into them. The place where these molecules fit is called the active site.
In the lock and key hypothesis, the shape of the active site matches the shape of its substrate (基質) molecules. This makes enzymes highly specific. Each type of enzyme can usually catalyst only one type of reaction.
Chitosan (甲殼素) 無效
This article aims to determine whether chitosan, a popular, over-the-counter, weight loss supplement, is an effective treatment for overweight and obesity.
Results obtained from high-quality trials indicate that the effect of chitosan on body weight is minimal and unlikely to be of clinical significance.
Mhurchu, C. N. (2005). Effect of chitosan on weight loss in overweight and obese individuals: a systematic review of randomized controlled trials. Obesity Reviews, 6(1), 35-42. https://doi.org/10.1111/j.1467-789X.2005.00158.x
White Kidney Bean (白腎豆) 有效
In summary, after analysis of the various effective parameters, our results clearly revealed that intake of dietary 2,400 mg Phaseolus vulgaris extract (PVE) capsules daily by obese human subjects is more effective at reducing body weight and body fat mass compared to daily intake of placebo in a short time period. In our experiments, no clinically significant changes and adverse events occurred or felt due to the active product during the trial period. PVE has the potential to induce weight loss and reduce fat mass caused by carbohydrates through its alpha‐amylase inhibiting activity. This work provides the detail information for the depth study and wide applications of PVE in the future work.
Wang, S. (2020). Regular intake of white kidney beans extract (Phaseolus vulgaris L.) induces weight loss compared to placebo in obese human subjects. Food Science and Nutrition, 8(3), 1315–1324. https://doi.org/10.1002/fsn3.1299
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