I'd like to know more about Tongkat ali and Fadogia agrestis supplements.

Tongkat ali may support libido and increase free testosterone; Fadogia agrestis may raise testosterone through luteinizing-hormone activity, but its long-term safety is less established and high doses raise toxicity concerns.

1. Tongkat ali dosage and cycling: Reported doses vary by preparation: 200–600 mg daily in one discussion, and 300–1,200 mg daily in another. Cycling generally isn’t considered necessary, though an optional cautious schedule discussed was 11 months on and 1 month off. 1 2

2. Tongkat ali and SHBG/libido: Tongkat may lower sex hormone-binding globulin (SHBG), freeing more testosterone; the SHBG-lowering effect appears more pronounced when SHBG is high. Libido effects may build over time and appear cumulative. 3 4 5

3. Fadogia agrestis mechanism: It may increase luteinizing hormone release and sensitivity at the LH receptor, stimulating testicular Leydig cells to produce more testosterone. 6 7

4. Fadogia safety and cycling: Testicular-cell toxicity has been reported in rodent studies at high doses. A discussed schedule is 3 weeks on and 1 week off; the available evidence was not considered sufficient to establish safety for continuous long-term use. 8 9

5. Monitoring: Blood tests are recommended to assess whether hormone supplements are having the intended effects and to catch unwanted changes. One suggested approach is to test before starting and again after about 4–8 weeks; Tongkat may warrant a later check, around 8–12 weeks. 10 11