Most products don’t list triterpene percentage. Here is a standardized extract that does (FreshCap brand):

https://a.co/d/d5LvvDZ


The LEF brand label:

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Reishi seems to have inhibiting effect on 5-alpha-reductase (study):

Red reishi, commonly known as LingZhi in Chinese, is a mushroom thought to have many health benefits. In a research study exploring the anti-androgenic effects of 20 species of mushrooms, reishi mushrooms had the strongest action in inhibiting testosterone (3). That study found that reishi mushrooms significantly reduced levels of 5-alpha reductase, preventing conversion of testosterone into the more potent DHT. High levels of DHT are a risk factor for conditions such as benign prostatatic hypertrophy (BPH), acne, and baldness.

So, reishi is a multitalent.

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In-vitro 5ar inhibition is different from in-vivo 5ar inhibition. Most “natural” supplements that inhibit 5ar in-vitro do not work in-vivo.

Some older study: Anti-androgenic activities of Ganoderma lucidum (Reishi)

In this paper, we have demonstrated the in vitro and in vivo anti-androgenic activity of Ganoderma lucidum for the first time.

@Virilius, thank you for your point. Will notice it for future analysis.