Bruce Harold Lipton is an American writer and lecturer whose work has been dismissed by some peers as pseudoscience. By his own admission, Lipton's ideas have not received attention from mainstream science. Lipton has not published original scientific research in a peer-reviewed medical journal in 30 years.

Lipton received a B.A. in biology from C.W. Post Campus of Long Island University in 1966 and a PhD in developmental biology from the University of Virginia in 1971. From 1973 to 1982, he taught anatomy at the University of Wisconsin School of Medicine, before joining St. George's University School of Medicine as a professor of anatomy for three years. Lipton has said that sometime in the 1980s, he rejected atheism and came to believe that the way cells function demonstrates the existence of God. Since 1993, he has taught primarily at alternative and chiropractic colleges and schools. Lipton has lectured at the New Zealand College of Chiropractic.

In 2010, Katherine Ellison wrote in her opinion column in the journal Frontiers in Ecology and the Environment that Lipton "remains on the sidelines of conventional discussions of epigenetics" and quoted him saying that mainstream science basically ignored him. In Science-Based Medicine, David Gorski called Lipton a "well-known crank" and likened his idea to the law of attraction, also known as "The Secret": "wanting something badly enough makes it so". He also criticized the support Lipton's ideas received from Deepak Chopra, calling both of them "quackery supporters".

Lipton has been known to express opposition to vaccinations, specifically with regard to a supposed association between vaccines and autism that has been firmly discredited: "The most important issue we have to face is this very serious issues about vaccines...The question of whether this [vaccines] is beneficial or not is now coming to the front because we are finding a very very epidemic increase in regard to allergic reactions or hypersensitivity. We're also finding that people are bringing in the concept that autism seems to associated with the widespread use of vaccines". He seems to believe that "forcing the immune system to respond to these vaccinations in such an abnormal way is not in the best interest of the body's system" and that for vaccines to work, they must be "natural". He often uses the naturalistic fallacy.

These anti-vaccine viewpoints contradict the overwhelming scientific consensus, which firmly establishes the safety and effectiveness of vaccines in preventing various diseases.

• The Biology of Belief – Unleashing the Power of Consciousness, Matter & Miracles (2005)
• Spontanous Evolution: Our Positive Future and a Way to Get There from Here (2010)
• The Honeymoon Effect: The Science of Creating Heaven on Earth (2013)
• The Biology of Belief – 10th Anniversary Edition (2015)

• New Thought
• Paul Pearsall
• Quantum mysticism

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