7-Keto DHEA — Research Profile

7-Keto is a metabolite of DHEA but does not convert to sex hormones (testosterone, estrogen). This is its key advantage — you get potential metabolic benefits without hormonal side effects. DHEA itself can increase sex hormones, which may be unwanted. 7-Keto is considered safer for long-term use.

The evidence is limited. Two small RCTs (33 and 45 subjects) from the same research group showed positive results ^[1]. There are no large, independent trials. The studies were also industry-funded. While results are promising, the evidence base is too small for confident recommendations.

7-Keto may be banned by some sports organizations (WADA lists DHEA metabolites). Athletes subject to drug testing should check with their sport's governing body before using 7-Keto. It is not a controlled substance for general consumer use.

Essentially all human research uses oral 3-acetyl-7-oxo-DHEA, the acetylated form marketed as "7-Keto." No head-to-head trial has established one salt, ester or delivery format as superior. It should not be confused with plain DHEA, a different compound that can convert to androgens and estrogens.

The most-studied claim is a modest rise in resting metabolic rate with some weight and body-fat reduction, seen in short 8-week trials at 200 mg/day and a 1-week crossover. However, a 2022 systematic review of four trials found only half showed significant weight loss and concluded that no clear answer can be given on efficacy, recommending against therapeutic use until better studies exist. These benefits should be treated as preliminary rather than proven.

No standardized dose is established. The weight-loss trials used 100 mg twice daily (200 mg/day) for 8 weeks, which is the most commonly referenced regimen and the highest dose shown to leave estrogen and testosterone unchanged. Because efficacy evidence is weak and long-term data are lacking, staying at or below the studied 200 mg/day is the only supported range.

The clinical trial dosed 7-Keto as 100 mg twice daily but never compared morning versus evening intake, so no optimal time of day has been established. Splitting it into two daily doses simply matches how it was studied. Whether taking the second dose earlier in the day avoids any T3-related sleep effects has not been tested.

In controlled trials of up to 200 mg/day for 8 weeks, adverse events were comparable to placebo and no serious events were reported. Some users report feeling jittery at doses as low as 100 mg/day; 7-Keto did not raise estrogen or testosterone, and any rise in the thyroid hormone T3 stayed within the normal range. Because reported experience is limited to short trials, less-common or longer-term side effects are not well characterized.

No well-documented drug interactions have been established for 7-Keto. The most plausible concern is with thyroid medication, because 7-Keto can raise T3; people taking levothyroxine or with thyroid disease should be cautious and monitored. The lack of documented interactions reflects limited study rather than proven absence of risk.

7-Keto is marketed mainly to adults seeking modest support for weight or body-fat loss alongside calorie restriction, which is the context the trials studied. Given weak and inconsistent efficacy evidence, it is not a proven weight-loss aid. People with thyroid conditions or on thyroid medication should be cautious because of its T3 effect, and it has not been tested in pregnancy or breastfeeding.

In a crossover trial, 7-Keto (3-acetyl-7-oxo-DHEA) raised resting metabolic rate measurably within a 7-day dosing period, so a metabolic effect can appear within about a week. Changes in body weight and body-fat percentage were only assessed over roughly 8-week trials paired with calorie restriction, so visible fat loss takes weeks rather than days. Results are modest and inconsistent across the small number of trials, so a clear timeline should not be assumed.

Controlled trials have only tested 7-Keto up to about 8 weeks at 200 mg/day, where it did not raise estrogen or testosterone; its long-term safety in humans has not been established. A systematic review of four trials reported no serious adverse effects but concluded the evidence is insufficient to recommend it for therapeutic use. Because it is structurally related to steroid hormones and can raise the thyroid hormone T3, daily use beyond the studied ~8-week window is not well characterized.

No formal upper limit has been set, and human trials have gone up to 200 mg/day for 8 weeks without serious adverse effects. Because 7-Keto can raise the thyroid hormone T3 (which stayed within the normal range in the trials), higher intakes carry a theoretical risk of T3-related cardiac strain or bone loss. Doses above the studied 200 mg/day have not been evaluated, so exceeding that range is not supported by evidence.

7-Keto has been tested inside a multi-ingredient thermogenic formula (HUM5007) combining it with green tea extract, chromium, vitamin C, calcium citrate and vitamin D, which raised resting metabolic rate slightly more than 7-Keto alone. No specific supplement-with-supplement conflicts are documented for 7-Keto. The main caution is stacking it with other products that stimulate thyroid activity or metabolism, given its effect on T3.

The studied ingredient is 3-acetyl-7-oxo-DHEA (the acetate ester marketed as "7-Keto"), so confirm the label lists that exact form with a stated per-serving amount rather than burying it in a proprietary blend. Note that 7-Keto is not the same as regular DHEA: DHEA can convert to sex hormones, whereas trials found 7-Keto did not raise estrogen or testosterone. Because it is a hormone-metabolite product sold without standardized quality requirements, third-party purity and identity testing is worth prioritizing.