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Under TRT I'd guess that nandrolone is more likely to lower total testosterone, which would need to be measured using LC/MS technology. This would be from some combination of lower SHBG and the additional free testosterone you mention that is caused by displacement. Your numbers perhaps bear this out, because the predicted sum of nandrolone and testosterone with your new protocol is around 1,200 ng/dL. One possible confounding factor is the magnitude of cross-reactivity to nandrolone present in the standard testosterone test. Is it close to 100%, or is it actually less?