It is believed that high doses of Tamoxifen may lower IGF-1 levels but only slightly and prevent muscle build up in the chest muscles or any other muscles with receptors where tamoxifen exerts it's influence due to the lack of estrogen which is needed to build muscle; at only 10 mg I don't believe there's much of a impact in that regard. I'd say for on cycle 10 mg will give you piece of mind in terms of any gyno that might flare up and the negative effect it might have are negligible at best at that dose. If you weren't on cycle then you could expect your gains to be hindered for sure but with AAS in your system it's not an issue IMO.





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