Peptide fact checks.

Cerebrolysin is a specific finished product and mixture. One 2015 sample contained 638 unique peptides. A 2024 study found different contents and activity in related products. A shared pig-brain source does not prove the same identity, contents, quality, or human evidence.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

The named Austrian product and the exact product, process, composition, and quality record of any other preparation.

Small studies measured increases in reproductive hormones. Some also found short-term testosterone changes. These measurements do not prove a treatment benefit.

What this answer is based on

Studies of body changes in people
This answer uses a study of how the substance enters or changes the body in people. This alone does not show a health benefit.

Applies to

Small, short studies in healthy men. The studies measured hormones, not fertility or treatment success.

Human studies mainly measured short-term hormone responses. FDA found too little evidence to judge whether Kisspeptin-10 treats secondary hypogonadism.

What this answer is based on

No reliable studies showing this health result in people
No reliable study in people shows the health outcome in this statement.

Applies to

Treatment outcomes for infertility, low testosterone, or hypogonadism. Hypogonadism means that the sex glands do not make enough hormones.

No FDA-approved product was identified. An FDA identity record does not mean approval. FDA also lists Kisspeptin-10 among substances that may present significant safety risks in compounding.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

United States status as reviewed August 30, 2026.

For covered male athletes, the 2026 WADA list prohibits kisspeptin and its agonist analogues at all times.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

The 2026 WADA rules for covered male athletes. Athletes must check the current rules that apply to them.

Yes. Randomized studies tested thymosin alpha-1 in people with specific illnesses. This only means human trials exist. It does not mean that they showed a benefit.

What this answer is based on

Health results from a study with randomly assigned groups
This answer uses a study that assigned people to groups by chance and measured a health outcome.

Applies to

The exact study products and groups of people with each illness. A result from one illness does not transfer to another.

The corrected result was 23.4% with thymosin alpha-1 and 24.1% with placebo. The study found no clear difference in 28-day deaths.

What this answer is based on

Health results from a study with randomly assigned groups
This answer uses a study that assigned people to groups by chance and measured a health outcome.

Applies to

The TESTS study randomized 1,106 adults with sepsis at 22 centers in China. The corrected analysis applies only to this study and outcome.

FDA says no approved U.S. drug contains thymosin alpha-1 free base or its acetate salt. Foreign product status does not create U.S. approval.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

United States regulatory status as reviewed August 30, 2026.

FDA's 2024 review describes Zadaxin as a finished medicine with narrow foreign approval. It is not the same as an ingredient name, a compounded product, or an online product.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

The exact product, ingredient form, way it was made, and country status all matter.

Phase 3 trials and the product label support this outcome in the labeled population.

What this answer is based on

Health results from a study with randomly assigned groups
This answer uses a study that assigned people to groups by chance and measured a health outcome.

Applies to

Adults with HIV and excess abdominal fat meeting the trial and label criteria.

The label specifically says it is not indicated for weight-loss management.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

The current Egrifta SV and Egrifta WR labels.

The 2026 WADA Prohibited List names tesamorelin in the S2 peptide-hormone and growth-factor category, which is prohibited at all times for covered athletes.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

Sport governed by the World Anti-Doping Code.

FDA records document the former Geref approvals. FDA later found that safety or effectiveness was not the reason for withdrawal.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

Historical Geref products, not current compounded sermorelin.

A hormone response cannot show that people live longer or age more slowly.

What this answer is based on

Studies of body changes in people
This answer uses a study of how the substance enters or changes the body in people. This alone does not show a health benefit.

Applies to

Hormone-response evidence cannot establish longer life or slower biological aging.

A former Geref approval does not make current compounded products FDA-approved. Current compounded products are not automatically the same as the former Geref products.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

Current products marketed after Geref withdrawal.

FDA's identity record lists gonadorelin's 10-amino-acid sequence. The current cattle Factrel label says it has the same sequence as the body's GnRH. This identity fact does not make every product equivalent or approved.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

The FDA-identified gonadorelin molecule only. It does not cover every product sold under the name.

FDA approved Factrel and Lutrepulse for human uses. Current Drugs@FDA records list both products as discontinued. That history does not mean that a current gonadorelin product is approved.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

Former U.S. human products and current U.S. human drug records as reviewed August 30, 2026.

FDA lists current gonadorelin products for cattle. Their animal approvals do not approve them for people. One cattle product also uses the Factrel name, but it is not the former human Factrel product.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

Current FDA-approved animal products for cattle, not human products.

Human studies used a pump to copy the body's normal signal pattern. They tested people with certain hormone disorders. They did not test gonadorelin during testosterone therapy.

What this answer is based on

No reliable studies showing this health result in people
No reliable study in people shows the health outcome in this statement.

Applies to

People using testosterone therapy; the reviewed pump studies did not test this claim.

For covered male athletes, the 2026 WADA Prohibited List names gonadorelin under testosterone-stimulating peptides.

What this answer is based on

Official record or product label
This answer uses an official regulator record or a specific product label.

Applies to

Covered male athletes under the 2026 WADA rules; athlete-specific rules can differ.