The Pill and Nutrient Claims
The combined oral contraceptive pill has been used for decades and remains one of the best-known methods of preventing pregnancy. Alongside its popularity runs a steady stream of personal essays and wellness commentary questioning what daily hormones do to the body. One such essay, written by a former user trained in natural nutrition, raised a number of points that fall into established and contested claims.
What the essay reported
The author took the pill for roughly five years from her teens, found that it eased migraines, and stopped about three years before writing. Her list of concerns covered animal testing of pharmaceuticals, traces of hormones entering waterways and affecting aquatic life, and common side effects such as weight gain, low mood and reduced libido. She also stated that the pill can lower levels of B vitamins, copper, zinc and vitamin C, and that it interacts with drugs including some antibiotics, anti-seizure medications, antidepressants and antifungals, as well as the herbal product St. John's wort.
How the evidence is generally described
Some of these points have support, though the strength differs. Drug interactions are well documented in pharmacology, and pharmacists routinely discuss them. Mood changes and altered desire are listed among reported side effects, yet studies disagree about how often they occur, and many users report no change. Evidence on vitamin and mineral depletion is mixed, and reviews have generally found the clinical significance unclear. Weight gain has been studied in large reviews, which have not found a consistent link for most combined pills.
The idea that the pill tricks the body into a state like pregnancy is a popular simplification. The hormones suppress ovulation, but the body is not in the same condition as during pregnancy.
Environmental and ethical arguments
Concerns about hormones in water are an active research area, with attention to synthetic oestrogen from many sources, including human excretion and livestock. Animal testing applies to nearly all licensed medicines, which leads some vegans and vegetarians to object to pharmaceuticals in general.
Effectiveness in context
The essay itself acknowledged that the pill is highly effective at preventing pregnancy, second only to abstinence. Typical-use failure rates are higher than perfect-use rates because doses are sometimes missed. Folic acid, mentioned in the source, is widely discussed for its role in early fetal development.
Health Canada and provincial health services publish product information, and medical opinions on hormonal contraception remain varied.
Frequently asked questions
Does the pill interact with other medicines?
Yes, some medicines and herbal products can change how hormonal contraceptives work. Pharmacists and prescribers keep interaction information.
Sources and further reading
Related reading
- The Birth Control Pill and the Questions Around It
Common questions about the birth control pill: side effects, nutrients, drug interactions and environmental concerns.
- The Pill and Contraception Options in Canada
A history of the pill and an overview of hormonal, intrauterine and barrier contraception in Canada.
- Non-Hormonal Contraception in Canada
How the diaphragm and spermicide work, their limits as non-hormonal contraception and why availability can vary in Canada.
- Teen Pregnancy Down, STI Concerns Up
Teen pregnancy has declined in Canada over decades, while public health agencies report rising rates of some STIs among young people.
- Genital Herpes and Unrecognized Infection
Explains herpes simplex viruses, why infection often goes unnoticed, and how testing and public health reporting work in Canada.
Updated November 2026. General information only, not medical, legal or professional advice. See the disclaimer and the medical disclaimer.